diff --git a/CHANGES.rst b/CHANGES.rst
index daf31a041..01a3c2a01 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,7 +7,7 @@
 1.3.5 (unreleased)
 ==================
 
-- Nothing changed yet.
+- Update the bundled libuv from 1.20.1 to 1.22.0.
 
 - Update Python versions tested on Travis, including PyPy to 6.0. See :issue:`1195`.
 
diff --git a/deps/libuv/AUTHORS b/deps/libuv/AUTHORS
index bb564ac75..ef3d5e181 100644
--- a/deps/libuv/AUTHORS
+++ b/deps/libuv/AUTHORS
@@ -336,3 +336,12 @@ Bob Burger <rgburger@beckman.com>
 Thomas Versteeg <thomasversteeg@gmx.com>
 zzzjim <zzzjim@users.noreply.github.com>
 Alex Arslan <ararslan@comcast.net>
+Kyle Farnung <kfarnung@microsoft.com>
+ssrlive <30760636+ssrlive@users.noreply.github.com>
+Tobias Nießen <tniessen@tnie.de>
+Björn Linse <bjorn.linse@gmail.com>
+zyxwvu Shi <i@shiyc.cn>
+Peter Johnson <johnson.peter@gmail.com>
+Paolo Greppi <paolo.greppi@libpf.com>
+Shelley Vohr <shelley.vohr@gmail.com>
+Ujjwal Sharma <usharma1998@gmail.com>
diff --git a/deps/libuv/CMakeLists.txt b/deps/libuv/CMakeLists.txt
new file mode 100644
index 000000000..a133edb85
--- /dev/null
+++ b/deps/libuv/CMakeLists.txt
@@ -0,0 +1,380 @@
+# TODO: determine CMAKE_SYSTEM_NAME on OS/390.  Currently assumes "OS/390".
+cmake_minimum_required(VERSION 3.0)
+project(libuv)
+enable_testing()
+
+if(MSVC)
+  list(APPEND uv_cflags /W4)
+elseif(CMAKE_C_COMPILER_ID MATCHES "AppleClang|Clang|GNU")
+  list(APPEND uv_cflags -fvisibility=hidden --std=gnu89)
+  list(APPEND uv_cflags -Wall -Wextra -Wstrict-prototypes)
+  list(APPEND uv_cflags -Wno-unused-parameter)
+endif()
+
+set(uv_sources
+    src/fs-poll.c
+    src/inet.c
+    src/threadpool.c
+    src/timer.c
+    src/uv-common.c
+    src/uv-data-getter-setters.c
+    src/version.c)
+
+set(uv_test_sources
+    test/blackhole-server.c
+    test/echo-server.c
+    test/run-tests.c
+    test/runner.c
+    test/test-active.c
+    test/test-async-null-cb.c
+    test/test-async.c
+    test/test-barrier.c
+    test/test-callback-order.c
+    test/test-callback-stack.c
+    test/test-close-fd.c
+    test/test-close-order.c
+    test/test-condvar.c
+    test/test-connect-unspecified.c
+    test/test-connection-fail.c
+    test/test-cwd-and-chdir.c
+    test/test-default-loop-close.c
+    test/test-delayed-accept.c
+    test/test-dlerror.c
+    test/test-eintr-handling.c
+    test/test-embed.c
+    test/test-emfile.c
+    test/test-env-vars.c
+    test/test-error.c
+    test/test-fail-always.c
+    test/test-fork.c
+    test/test-fs-copyfile.c
+    test/test-fs-event.c
+    test/test-fs-poll.c
+    test/test-fs.c
+    test/test-get-currentexe.c
+    test/test-get-loadavg.c
+    test/test-get-memory.c
+    test/test-get-passwd.c
+    test/test-getaddrinfo.c
+    test/test-gethostname.c
+    test/test-getnameinfo.c
+    test/test-getsockname.c
+    test/test-getters-setters.c
+    test/test-handle-fileno.c
+    test/test-homedir.c
+    test/test-hrtime.c
+    test/test-idle.c
+    test/test-ip4-addr.c
+    test/test-ip6-addr.c
+    test/test-ip6-addr.c
+    test/test-ipc-heavy-traffic-deadlock-bug.c
+    test/test-ipc-send-recv.c
+    test/test-ipc.c
+    test/test-loop-alive.c
+    test/test-loop-close.c
+    test/test-loop-configure.c
+    test/test-loop-handles.c
+    test/test-loop-stop.c
+    test/test-loop-time.c
+    test/test-multiple-listen.c
+    test/test-mutexes.c
+    test/test-osx-select.c
+    test/test-pass-always.c
+    test/test-ping-pong.c
+    test/test-pipe-bind-error.c
+    test/test-pipe-close-stdout-read-stdin.c
+    test/test-pipe-connect-error.c
+    test/test-pipe-connect-multiple.c
+    test/test-pipe-connect-prepare.c
+    test/test-pipe-getsockname.c
+    test/test-pipe-pending-instances.c
+    test/test-pipe-sendmsg.c
+    test/test-pipe-server-close.c
+    test/test-pipe-set-fchmod.c
+    test/test-pipe-set-non-blocking.c
+    test/test-platform-output.c
+    test/test-poll-close-doesnt-corrupt-stack.c
+    test/test-poll-close.c
+    test/test-poll-closesocket.c
+    test/test-poll-oob.c
+    test/test-poll.c
+    test/test-process-title-threadsafe.c
+    test/test-process-title.c
+    test/test-queue-foreach-delete.c
+    test/test-ref.c
+    test/test-run-nowait.c
+    test/test-run-once.c
+    test/test-semaphore.c
+    test/test-shutdown-close.c
+    test/test-shutdown-eof.c
+    test/test-shutdown-twice.c
+    test/test-signal-multiple-loops.c
+    test/test-signal.c
+    test/test-socket-buffer-size.c
+    test/test-spawn.c
+    test/test-stdio-over-pipes.c
+    test/test-tcp-alloc-cb-fail.c
+    test/test-tcp-bind-error.c
+    test/test-tcp-bind6-error.c
+    test/test-tcp-close-accept.c
+    test/test-tcp-close-while-connecting.c
+    test/test-tcp-close.c
+    test/test-tcp-connect-error-after-write.c
+    test/test-tcp-connect-error.c
+    test/test-tcp-connect-timeout.c
+    test/test-tcp-connect6-error.c
+    test/test-tcp-create-socket-early.c
+    test/test-tcp-flags.c
+    test/test-tcp-oob.c
+    test/test-tcp-open.c
+    test/test-tcp-read-stop.c
+    test/test-tcp-shutdown-after-write.c
+    test/test-tcp-try-write.c
+    test/test-tcp-unexpected-read.c
+    test/test-tcp-write-after-connect.c
+    test/test-tcp-write-fail.c
+    test/test-tcp-write-queue-order.c
+    test/test-tcp-write-to-half-open-connection.c
+    test/test-tcp-writealot.c
+    test/test-thread-equal.c
+    test/test-thread.c
+    test/test-threadpool-cancel.c
+    test/test-threadpool.c
+    test/test-timer-again.c
+    test/test-timer-from-check.c
+    test/test-timer.c
+    test/test-tmpdir.c
+    test/test-tty.c
+    test/test-udp-alloc-cb-fail.c
+    test/test-udp-bind.c
+    test/test-udp-create-socket-early.c
+    test/test-udp-dgram-too-big.c
+    test/test-udp-ipv6.c
+    test/test-udp-multicast-interface.c
+    test/test-udp-multicast-interface6.c
+    test/test-udp-multicast-join.c
+    test/test-udp-multicast-join6.c
+    test/test-udp-multicast-ttl.c
+    test/test-udp-open.c
+    test/test-udp-options.c
+    test/test-udp-send-and-recv.c
+    test/test-udp-send-hang-loop.c
+    test/test-udp-send-immediate.c
+    test/test-udp-send-unreachable.c
+    test/test-udp-try-send.c
+    test/test-walk-handles.c
+    test/test-watcher-cross-stop.c)
+
+if(WIN32)
+  list(APPEND uv_defines WIN32_LEAN_AND_MEAN _WIN32_WINNT=0x0600)
+  list(APPEND uv_libraries
+       advapi32
+       iphlpapi
+       psapi
+       shell32
+       user32
+       userenv
+       ws2_32)
+  list(APPEND uv_sources
+       src/win/async.c
+       src/win/core.c
+       src/win/detect-wakeup.c
+       src/win/dl.c
+       src/win/error.c
+       src/win/fs.c
+       src/win/fs-event.c
+       src/win/getaddrinfo.c
+       src/win/getnameinfo.c
+       src/win/handle.c
+       src/win/loop-watcher.c
+       src/win/pipe.c
+       src/win/thread.c
+       src/win/poll.c
+       src/win/process.c
+       src/win/process-stdio.c
+       src/win/req.c
+       src/win/signal.c
+       src/win/snprintf.c
+       src/win/stream.c
+       src/win/tcp.c
+       src/win/tty.c
+       src/win/udp.c
+       src/win/util.c
+       src/win/winapi.c
+       src/win/winsock.c)
+  list(APPEND uv_test_libraries ws2_32)
+  list(APPEND uv_test_sources src/win/snprintf.c test/runner-win.c)
+else()
+  list(APPEND uv_defines _FILE_OFFSET_BITS=64 _LARGEFILE_SOURCE)
+  list(APPEND uv_libraries pthread)
+  list(APPEND uv_sources
+       src/unix/async.c
+       src/unix/core.c
+       src/unix/dl.c
+       src/unix/fs.c
+       src/unix/getaddrinfo.c
+       src/unix/getnameinfo.c
+       src/unix/loop-watcher.c
+       src/unix/loop.c
+       src/unix/pipe.c
+       src/unix/poll.c
+       src/unix/process.c
+       src/unix/signal.c
+       src/unix/stream.c
+       src/unix/tcp.c
+       src/unix/thread.c
+       src/unix/tty.c
+       src/unix/udp.c)
+  list(APPEND uv_test_sources test/runner-unix.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL "AIX")
+  list(APPEND uv_defines
+       _ALL_SOURCE
+       _LINUX_SOURCE_COMPAT
+       _THREAD_SAFE
+       _XOPEN_SOURCE=500)
+  list(APPEND uv_libraries perfstat)
+  list(APPEND uv_sources src/unix/aix.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL "Android")
+  list(APPEND uv_libs dl)
+  list(APPEND uv_sources
+       src/unix/android-ifaddrs.c
+       src/unix/linux-core.c
+       src/unix/linux-inotify.c
+       src/unix/linux-syscalls.c
+       src/unix/procfs-exepath.c
+       src/unix/pthread-fixes.c
+       src/unix/sysinfo-loadavg.c
+       src/unix/sysinfo-memory.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME MATCHES "Android|Darwin|Linux|OS/390")
+  list(APPEND uv_sources src/unix/proctitle.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD")
+  list(APPEND uv_sources src/unix/freebsd.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD|NetBSD|OpenBSD")
+  list(APPEND uv_sources src/unix/posix-hrtime.c)
+  list(APPEND uv_libraries kvm)
+endif()
+
+if(CMAKE_SYSTEM_NAME MATCHES "Darwin|DragonFly|FreeBSD|NetBSD|OpenBSD")
+  list(APPEND uv_sources src/unix/bsd-ifaddrs.c src/unix/kqueue.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+  list(APPEND uv_defines _DARWIN_UNLIMITED_SELECT=1 _DARWIN_USE_64_BIT_INODE=1)
+  list(APPEND uv_sources
+       src/unix/darwin-proctitle.c
+       src/unix/darwin.c
+       src/unix/fsevents.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+  list(APPEND uv_defines _GNU_SOURCE _POSIX_C_SOURCE=200112)
+  list(APPEND uv_libraries dl rt)
+  list(APPEND uv_sources
+       src/unix/linux-core.c
+       src/unix/linux-inotify.c
+       src/unix/linux-syscalls.c
+       src/unix/procfs-exepath.c
+       src/unix/sysinfo-loadavg.c
+       src/unix/sysinfo-memory.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
+  list(APPEND uv_sources src/unix/netbsd.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
+  list(APPEND uv_sources src/unix/openbsd.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL "OS/390")
+  list(APPEND uv_defines PATH_MAX=255)
+  list(APPEND uv_defines _AE_BIMODAL)
+  list(APPEND uv_defines _ALL_SOURCE)
+  list(APPEND uv_defines _LARGE_TIME_API)
+  list(APPEND uv_defines _OPEN_MSGQ_EXT)
+  list(APPEND uv_defines _OPEN_SYS_FILE_EXT)
+  list(APPEND uv_defines _OPEN_SYS_IF_EXT)
+  list(APPEND uv_defines _OPEN_SYS_SOCK_IPV6)
+  list(APPEND uv_defines _UNIX03_SOURCE)
+  list(APPEND uv_defines _UNIX03_THREADS)
+  list(APPEND uv_defines _UNIX03_WITHDRAWN)
+  list(APPEND uv_defines _XOPEN_SOURCE_EXTENDED)
+  list(APPEND uv_sources
+       src/unix/pthread-fixes.c
+       src/unix/pthread-barrier.c
+       src/unix/os390.c
+       src/unix/os390-syscalls.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL "SunOS")
+  list(APPEND uv_defines __EXTENSIONS__ _XOPEN_SOURCE=500)
+  list(APPEND uv_libraries kstat nsl sendfile socket)
+  list(APPEND uv_sources src/unix/no-proctitle.c src/unix/sunos.c)
+endif()
+
+if(CMAKE_SYSTEM_NAME MATCHES "Darwin|DragonFly|FreeBSD|Linux|NetBSD|OpenBSD")
+  list(APPEND uv_test_libraries util)
+endif()
+
+add_library(uv SHARED ${uv_sources})
+target_compile_definitions(uv PRIVATE ${uv_defines} BUILDING_UV_SHARED=1)
+target_compile_options(uv PRIVATE ${uv_cflags})
+target_include_directories(uv PRIVATE include src)
+target_link_libraries(uv ${uv_libraries})
+
+add_library(uv_a STATIC ${uv_sources})
+target_compile_definitions(uv_a PRIVATE ${uv_defines})
+target_compile_options(uv_a PRIVATE ${uv_cflags})
+target_include_directories(uv_a PRIVATE include src)
+target_link_libraries(uv_a ${uv_libraries})
+
+if(BUILD_TESTING)
+  include(CTest)
+  add_executable(uv_run_tests ${uv_test_sources})
+  target_compile_definitions(uv_run_tests PRIVATE ${uv_defines})
+  target_compile_options(uv_run_tests PRIVATE ${uv_cflags})
+  target_include_directories(uv_run_tests PRIVATE include)
+  target_link_libraries(uv_run_tests uv ${uv_test_libraries})
+  add_test(NAME uv_test
+           COMMAND uv_run_tests
+           WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+  add_executable(uv_run_tests_a ${uv_test_sources})
+  target_compile_definitions(uv_run_tests_a PRIVATE ${uv_defines})
+  target_compile_options(uv_run_tests_a PRIVATE ${uv_cflags})
+  target_include_directories(uv_run_tests_a PRIVATE include)
+  target_link_libraries(uv_run_tests_a uv_a ${uv_test_libraries})
+  add_test(NAME uv_test_a
+           COMMAND uv_run_tests_a
+           WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+endif()
+
+if(UNIX)
+  # Now for some gibbering horrors from beyond the stars...
+  include(GNUInstallDirs)
+  foreach(x ${uv_libraries})
+    set(LIBS "${LIBS} -l${x}")
+  endforeach(x)
+  file(STRINGS configure.ac configure_ac REGEX ^AC_INIT)
+  string(REGEX MATCH [0-9]+[.][0-9]+[.][0-9]+ PACKAGE_VERSION "${configure_ac}")
+  set(includedir ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR})
+  set(libdir ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
+  set(prefix ${CMAKE_INSTALL_PREFIX})
+  configure_file(libuv.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libuv.pc @ONLY)
+
+  install(DIRECTORY include/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+  install(FILES LICENSE DESTINATION ${CMAKE_INSTALL_DOCDIR})
+  install(FILES LICENSE ${CMAKE_CURRENT_BINARY_DIR}/libuv.pc
+          DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
+  install(TARGETS uv LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
+  install(TARGETS uv_a ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+endif()
diff --git a/deps/libuv/CONTRIBUTING.md b/deps/libuv/CONTRIBUTING.md
index d9bf0472f..f22e124e3 100644
--- a/deps/libuv/CONTRIBUTING.md
+++ b/deps/libuv/CONTRIBUTING.md
@@ -137,7 +137,10 @@ $ git rebase upstream/v1.x  # or upstream/master
 ### TEST
 
 Bug fixes and features should come with tests.  Add your tests in the
-`test/` directory. Each new test needs to be registered in `test/test-list.h`. If you add a new test file, it needs to be registered in two places:
+`test/` directory. Each new test needs to be registered in `test/test-list.h`.
+
+If you add a new test file, it needs to be registered in three places:
+- `CMakeLists.txt`: add the file's name to the `uv_test_sources` list.
 - `Makefile.am`: add the file's name to the `test_run_tests_SOURCES` list.
 - `uv.gyp`: add the file's name to the `sources` list in the `run-tests` target.
 
diff --git a/deps/libuv/ChangeLog b/deps/libuv/ChangeLog
index 2af2302dc..5cd862152 100644
--- a/deps/libuv/ChangeLog
+++ b/deps/libuv/ChangeLog
@@ -1,4 +1,166 @@
-2018.04.19, Version 1.20.1 (Stable)
+2018.07.11, Version 1.22.0 (Stable)
+
+Changes since version 1.21.0:
+
+* unix: remove checksparse.sh (Ben Noordhuis)
+
+* win: fix mingw build error (Ben Noordhuis)
+
+* win: fix -Wunused-function warnings in thread.c (Ben Noordhuis)
+
+* unix,win: merge timers implementation (Ben Noordhuis)
+
+* win: fix pointer type in pipe.c (Ben Noordhuis)
+
+* win: fixing build for older MSVC compilers (Michael Fero)
+
+* zos: clear poll events on every iteration (jBarz)
+
+* zos: write-protect message queue (jBarz)
+
+* zos: use correct pointer type in strnlen (jBarz)
+
+* unix,win: merge handle flags (Ben Noordhuis)
+
+* doc: update Imran Iqbal's GitHub handle (cjihrig)
+
+* src: add new error apis to prevent memory leaks (Shelley Vohr)
+
+* test: make test-condvar call uv_cond_wait (Jamie Davis)
+
+* fs: change position of uv_fs_lchown (Ujjwal Sharma)
+
+
+2018.06.23, Version 1.21.0 (Stable), e4983a9b0c152932f7553ff4a9ff189d2314cdcb
+
+Changes since version 1.20.3:
+
+* unix,windows: map EFTYPE errno (cjihrig)
+
+* win: perform case insensitive PATH= comparison (cjihrig)
+
+* win, fs: uv_fs_fchmod support for -A files (Bartosz Sosnowski)
+
+* src,lib: fix comments (Tobias Nießen)
+
+* win,process: allow child pipe handles to be opened in overlapped mode (Björn
+  Linse)
+
+* src,test: fix idiosyncratic comment style (Bert Belder)
+
+* test: fs_fchmod_archive_readonly must return a value (Bert Belder)
+
+* win,pipe: fix incorrect error code returned from uv_pipe_write_impl() (Bert
+  Belder)
+
+* win,pipe: properly set uv_write_t.send_handle in uv_write2() (Bert Belder)
+
+* test: add vectored uv_write() ping-pong tests (Bert Belder)
+
+* win,pipe: support vectored uv_write() calls (Bert Belder)
+
+* win,pipe: refactor pipe read cancellation logic (Bert Belder)
+
+* test: improve output from IPC test helpers (Bert Belder)
+
+* test: add test for IPC deadlock on Windows (
+
+* win,pipe: fix IPC pipe deadlock (Bert Belder)
+
+* unix: catch some cases of watching fd twice (Ben Noordhuis)
+
+* test: use custom timeout for getaddrinfo_fail_sync (Ben Noordhuis)
+
+* Revert "win: add Windows XP support to uv_if_indextoname()" (Bert Belder)
+
+* win,thread: remove fallback uv_cond implementation (Bert Belder)
+
+* src,test: s/olny/only (cjihrig)
+
+* unix: close signal pipe fds on unload (Ben Noordhuis)
+
+* win: allow setting udp socket options before bind (cjihrig)
+
+* unix: return UV_ENOTSUP on FICLONE_FORCE failure (cjihrig)
+
+* win,pipe: remove unreferenced local variable (Bert Belder)
+
+* win,code: remove GetQueuedCompletionStatus-based poller (Bert Belder)
+
+* win: remove the remaining dynamic kernel32 imports (Bert Belder)
+
+* test: speedup process-title-threadsafe on macOS (cjihrig)
+
+* core: move all include files except uv.h to uv/ (Saúl Ibarra Corretgé)
+
+* win: move stdint-msvc2008.h to include/uv/ (Ben Noordhuis)
+
+* build: fix cygwin install (Ben Noordhuis)
+
+* build,win: remove MinGW Makefile (Saúl Ibarra Corretgé)
+
+* build: add a cmake build file (Ben Noordhuis)
+
+* build: add test suite option to cmake build (Ben Noordhuis)
+
+* unix: set errno in uv_fs_copyfile() (cjihrig)
+
+* samples: fix inconsistency in parse_opts vs usage (zyxwvu Shi)
+
+* linux: handle exclusive POLLHUP with UV_DISCONNECT (Brad King)
+
+* include: declare uv_cpu_times_s in higher scope (Peter Johnson)
+
+* doc: add uv_fs_fsync() AIX limitations (jBarz)
+
+* unix,win: add uv_fs_lchown() (Paolo Greppi)
+
+* unix: disable clang variable length array warning (Peter Johnson)
+
+* doc: document uv_pipe_t::ipc (Ed Schouten)
+
+* doc: undocument uv_req_type's UV_REQ_TYPE_PRIVATE (Ed Schouten)
+
+* doc: document UV_*_MAP() macros (Ed Schouten)
+
+* win: remove use of min() macro in pipe.c (Peter Johnson)
+
+* doc: add jbarz as maintainer (
+
+
+2018.05.08, Version 1.20.3 (Stable), 8cfd67e59195251dff793ee47c185c9d6a8f3818
+
+Changes since version 1.20.2:
+
+* win: add Windows XP support to uv_if_indextoname() (ssrlive)
+
+* win: fix `'floor' undefined` compiler warning (ssrlive)
+
+* win, pipe: stop read for overlapped pipe (Bartosz Sosnowski)
+
+* build: fix utf-8 name of copyright holder (Jérémy Lal)
+
+* zos: initialize pollfd revents (jBarz)
+
+* zos,doc: add system V message queue note (jBarz)
+
+* linux: don't use uv__nonblock_ioctl() on sparc (Ben Noordhuis)
+
+
+2018.04.23, Version 1.20.2 (Stable), c51fd3f66bbb386a1efdeba6812789f35a372d1e
+
+Changes since version 1.20.1:
+
+* zos: use custom semaphore (jBarz)
+
+* win: fix registry API error handling (Kyle Farnung)
+
+* build: add support for 64-bit AIX (Richard Lau)
+
+* aix: guard STATIC_ASSERT for glibc work around (Richard Lau)
+
+
+2018.04.19, Version 1.20.1 (Stable), 36ac2fc8edfd5ff3e9be529be1d4a3f0d5364e94
 
 Changes since version 1.20.0:
 
diff --git a/deps/libuv/MAINTAINERS.md b/deps/libuv/MAINTAINERS.md
index d85deb006..889ee4988 100644
--- a/deps/libuv/MAINTAINERS.md
+++ b/deps/libuv/MAINTAINERS.md
@@ -12,8 +12,9 @@ libuv is currently managed by the following individuals:
   - GPG key: 5735 3E0D BDAA A7E8 39B6  6A1A FF47 D5E4 AD8B 4FDC (pubkey-cjihrig-kb)
 * **Fedor Indutny** ([@indutny](https://github.com/indutny))
   - GPG key: AF2E EA41 EC34 47BF DD86  FED9 D706 3CCE 19B7 E890 (pubkey-indutny)
-* **Imran Iqbal** ([@iWuzHere](https://github.com/iWuzHere))
+* **Imran Iqbal** ([@imran-iq](https://github.com/imran-iq))
   - GPG key: 9DFE AA5F 481B BF77 2D90  03CE D592 4925 2F8E C41A (pubkey-iwuzhere)
+* **John Barboza** ([@jbarz](https://github.com/jbarz))
 * **Santiago Gimeno** ([@santigimeno](https://github.com/santigimeno))
   - GPG key: 612F 0EAD 9401 6223 79DF  4402 F28C 3C8D A33C 03BE (pubkey-santigimeno)
 * **Saúl Ibarra Corretgé** ([@saghul](https://github.com/saghul))
diff --git a/deps/libuv/Makefile.am b/deps/libuv/Makefile.am
index ae9d96bcf..04aecab55 100644
--- a/deps/libuv/Makefile.am
+++ b/deps/libuv/Makefile.am
@@ -17,7 +17,10 @@ ACLOCAL_AMFLAGS = -I m4
 AM_CPPFLAGS = -I$(top_srcdir)/include \
               -I$(top_srcdir)/src
 
-include_HEADERS=include/uv.h include/uv-errno.h include/uv-threadpool.h include/uv-version.h
+include_HEADERS=include/uv.h
+
+uvincludedir = $(includedir)/uv
+uvinclude_HEADERS=include/uv/errno.h include/uv/threadpool.h include/uv/version.h
 
 CLEANFILES =
 
@@ -29,6 +32,7 @@ libuv_la_SOURCES = src/fs-poll.c \
                    src/inet.c \
                    src/queue.h \
                    src/threadpool.c \
+                   src/timer.c \
                    src/uv-data-getter-setters.c \
                    src/uv-common.c \
                    src/uv-common.h \
@@ -42,7 +46,7 @@ endif
 
 if WINNT
 
-include_HEADERS += include/uv-win.h include/tree.h
+uvinclude_HEADERS += include/uv/win.h include/uv/tree.h
 AM_CPPFLAGS += -I$(top_srcdir)/src/win \
                -DWIN32_LEAN_AND_MEAN \
                -D_WIN32_WINNT=0x0600
@@ -71,7 +75,6 @@ libuv_la_SOURCES += src/win/async.c \
                     src/win/stream-inl.h \
                     src/win/tcp.c \
                     src/win/thread.c \
-                    src/win/timer.c \
                     src/win/tty.c \
                     src/win/udp.c \
                     src/win/util.c \
@@ -82,7 +85,7 @@ libuv_la_SOURCES += src/win/async.c \
 
 else  # WINNT
 
-include_HEADERS += include/uv-unix.h
+uvinclude_HEADERS += include/uv/unix.h
 AM_CPPFLAGS += -I$(top_srcdir)/src/unix
 libuv_la_SOURCES += src/unix/async.c \
                    src/unix/atomic-ops.h \
@@ -102,7 +105,6 @@ libuv_la_SOURCES += src/unix/async.c \
                    src/unix/stream.c \
                    src/unix/tcp.c \
                    src/unix/thread.c \
-                   src/unix/timer.c \
                    src/unix/tty.c \
                    src/unix/udp.c
 
@@ -121,7 +123,6 @@ EXTRA_DIST = test/fixtures/empty_file \
              README.md \
              checksparse.sh \
              vcbuild.bat \
-             Makefile.mingw \
              common.gypi \
              gyp_uv.py \
              uv.gyp
@@ -191,6 +192,7 @@ test_run_tests_SOURCES = test/blackhole-server.c \
                          test/test-idle.c \
                          test/test-ip4-addr.c \
                          test/test-ip6-addr.c \
+                         test/test-ipc-heavy-traffic-deadlock-bug.c \
                          test/test-ipc-send-recv.c \
                          test/test-ipc.c \
                          test/test-list.h \
@@ -332,19 +334,19 @@ libuv_la_CFLAGS += -D_ALL_SOURCE \
                    -D_LINUX_SOURCE_COMPAT \
                    -D_THREAD_SAFE \
                    -DHAVE_SYS_AHAFS_EVPRODS_H
-include_HEADERS += include/uv-aix.h
+uvinclude_HEADERS += include/uv/aix.h
 libuv_la_SOURCES += src/unix/aix.c src/unix/aix-common.c
 endif
 
 if ANDROID
-include_HEADERS += include/android-ifaddrs.h \
-                   include/pthread-barrier.h
+uvinclude_HEADERS += include/uv/android-ifaddrs.h \
+                   include/uv/pthread-barrier.h
 libuv_la_SOURCES += src/unix/android-ifaddrs.c \
                     src/unix/pthread-fixes.c
 endif
 
 if CYGWIN
-include_HEADERS += include/uv-posix.h
+uvinclude_HEADERS += include/uv/posix.h
 libuv_la_CFLAGS += -D_GNU_SOURCE
 libuv_la_SOURCES += src/unix/cygwin.c \
                     src/unix/bsd-ifaddrs.c \
@@ -358,8 +360,8 @@ libuv_la_SOURCES += src/unix/cygwin.c \
 endif
 
 if DARWIN
-include_HEADERS += include/uv-darwin.h \
-                   include/pthread-barrier.h
+uvinclude_HEADERS += include/uv/darwin.h \
+                   include/uv/pthread-barrier.h
 libuv_la_CFLAGS += -D_DARWIN_USE_64_BIT_INODE=1
 libuv_la_CFLAGS += -D_DARWIN_UNLIMITED_SELECT=1
 libuv_la_SOURCES += src/unix/bsd-ifaddrs.c \
@@ -372,7 +374,7 @@ test_run_tests_LDFLAGS += -lutil
 endif
 
 if DRAGONFLY
-include_HEADERS += include/uv-bsd.h
+uvinclude_HEADERS += include/uv/bsd.h
 libuv_la_SOURCES += src/unix/bsd-ifaddrs.c \
                     src/unix/freebsd.c \
                     src/unix/kqueue.c \
@@ -381,7 +383,7 @@ test_run_tests_LDFLAGS += -lutil
 endif
 
 if FREEBSD
-include_HEADERS += include/uv-bsd.h
+uvinclude_HEADERS += include/uv/bsd.h
 libuv_la_SOURCES += src/unix/bsd-ifaddrs.c \
                     src/unix/freebsd.c \
                     src/unix/kqueue.c \
@@ -390,7 +392,7 @@ test_run_tests_LDFLAGS += -lutil
 endif
 
 if LINUX
-include_HEADERS += include/uv-linux.h
+uvinclude_HEADERS += include/uv/linux.h
 libuv_la_CFLAGS += -D_GNU_SOURCE
 libuv_la_SOURCES += src/unix/linux-core.c \
                     src/unix/linux-inotify.c \
@@ -417,7 +419,7 @@ libuv_la_SOURCES += src/unix/cygwin.c \
 endif
 
 if NETBSD
-include_HEADERS += include/uv-bsd.h
+uvinclude_HEADERS += include/uv/bsd.h
 libuv_la_SOURCES += src/unix/bsd-ifaddrs.c \
                     src/unix/kqueue.c \
                     src/unix/netbsd.c \
@@ -426,7 +428,7 @@ test_run_tests_LDFLAGS += -lutil
 endif
 
 if OPENBSD
-include_HEADERS += include/uv-bsd.h
+uvinclude_HEADERS += include/uv/bsd.h
 libuv_la_SOURCES += src/unix/bsd-ifaddrs.c \
                     src/unix/kqueue.c \
                     src/unix/openbsd.c \
@@ -435,14 +437,14 @@ test_run_tests_LDFLAGS += -lutil
 endif
 
 if SUNOS
-include_HEADERS += include/uv-sunos.h
+uvinclude_HEADERS += include/uv/sunos.h
 libuv_la_CFLAGS += -D__EXTENSIONS__ -D_XOPEN_SOURCE=500
 libuv_la_SOURCES += src/unix/no-proctitle.c \
                     src/unix/sunos.c
 endif
 
 if OS390
-include_HEADERS += include/pthread-barrier.h
+uvinclude_HEADERS += include/uv/pthread-barrier.h
 libuv_la_CFLAGS += -D_UNIX03_THREADS \
                    -D_UNIX03_SOURCE \
                    -D_OPEN_SYS_IF_EXT=1 \
diff --git a/deps/libuv/Makefile.mingw b/deps/libuv/Makefile.mingw
deleted file mode 100644
index 3acf9e14a..000000000
--- a/deps/libuv/Makefile.mingw
+++ /dev/null
@@ -1,86 +0,0 @@
-# Copyright (c) 2013, Ben Noordhuis <info@bnoordhuis.nl>
-#
-# Permission to use, copy, modify, and/or distribute this software for any
-# purpose with or without fee is hereby granted, provided that the above
-# copyright notice and this permission notice appear in all copies.
-#
-# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-CC ?= gcc
-
-CFLAGS += -Wall \
-          -Wextra \
-          -Wno-unused-parameter \
-          -Wstrict-prototypes \
-          -Iinclude \
-          -Isrc \
-          -Isrc/win \
-          -DWIN32_LEAN_AND_MEAN \
-          -D_WIN32_WINNT=0x0600
-
-INCLUDES = include/stdint-msvc2008.h \
-           include/tree.h \
-           include/uv-errno.h \
-           include/uv-threadpool.h \
-           include/uv-version.h \
-           include/uv-win.h \
-           include/uv.h \
-           src/heap-inl.h \
-           src/queue.h \
-           src/uv-common.h \
-           src/win/atomicops-inl.h \
-           src/win/handle-inl.h \
-           src/win/internal.h \
-           src/win/req-inl.h \
-           src/win/stream-inl.h \
-           src/win/winapi.h \
-           src/win/winsock.h
-
-OBJS = src/fs-poll.o \
-       src/inet.o \
-       src/threadpool.o \
-       src/uv-common.o \
-       src/version.o \
-       src/win/async.o \
-       src/win/core.o \
-       src/win/detect-wakeup.o \
-       src/win/dl.o \
-       src/win/error.o \
-       src/win/fs-event.o \
-       src/win/fs.o \
-       src/win/getaddrinfo.o \
-       src/win/getnameinfo.o \
-       src/win/handle.o \
-       src/win/loop-watcher.o \
-       src/win/pipe.o \
-       src/win/poll.o \
-       src/win/process-stdio.o \
-       src/win/process.o \
-       src/win/req.o \
-       src/win/signal.o \
-       src/win/stream.o \
-       src/win/tcp.o \
-       src/win/thread.o \
-       src/win/timer.o \
-       src/win/tty.o \
-       src/win/udp.o \
-       src/win/util.o \
-       src/win/winapi.o \
-       src/win/winsock.o
-
-all: libuv.a
-
-clean:
-	-$(RM) $(OBJS) libuv.a
-
-libuv.a: $(OBJS)
-	$(AR) crs $@ $^
-
-$(OBJS): %.o : %.c $(INCLUDES)
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/deps/libuv/README.md b/deps/libuv/README.md
index 1aaed1a88..f6e7288de 100644
--- a/deps/libuv/README.md
+++ b/deps/libuv/README.md
@@ -169,6 +169,16 @@ $ make check
 $ make install
 ```
 
+To build with [CMake](https://cmake.org/):
+
+```bash
+$ mkdir -p out/cmake ; cd out/cmake ; cmake -DBUILD_TESTING=ON ../..
+$ make all test
+# Or manually:
+$ ./uv_run_tests    # shared library build
+$ ./uv_run_tests_a  # static library build
+```
+
 To build with GYP, first run:
 
 ```bash
@@ -322,6 +332,13 @@ describes the package in more detail.
 
 AIX support for filesystem events is not compiled when building with `gyp`.
 
+### z/OS Notes
+
+z/OS creates System V semaphores and message queues. These persist on the system
+after the process terminates unless the event loop is closed.
+
+Use the `ipcrm` command to manually clear up System V resources.
+
 ## Patches
 
 See the [guidelines for contributing][].
diff --git a/deps/libuv/checksparse.sh b/deps/libuv/checksparse.sh
deleted file mode 100755
index d8b50bc4f..000000000
--- a/deps/libuv/checksparse.sh
+++ /dev/null
@@ -1,253 +0,0 @@
-#!/bin/sh
-
-# Copyright (c) 2013, Ben Noordhuis <info@bnoordhuis.nl>
-#
-# Permission to use, copy, modify, and/or distribute this software for any
-# purpose with or without fee is hereby granted, provided that the above
-# copyright notice and this permission notice appear in all copies.
-#
-# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-SPARSE=${SPARSE:-sparse}
-
-SPARSE_FLAGS=${SPARSE_FLAGS:-"
--D__POSIX__
--Wsparse-all
--Wno-do-while
--Wno-transparent-union
--Iinclude
--Isrc
-"}
-
-SOURCES="
-include/tree.h
-include/uv-unix.h
-include/uv.h
-src/fs-poll.c
-src/inet.c
-src/queue.h
-src/unix/async.c
-src/unix/core.c
-src/unix/dl.c
-src/unix/fs.c
-src/unix/getaddrinfo.c
-src/unix/internal.h
-src/unix/loop-watcher.c
-src/unix/loop.c
-src/unix/pipe.c
-src/unix/poll.c
-src/unix/process.c
-src/unix/signal.c
-src/unix/stream.c
-src/unix/tcp.c
-src/unix/thread.c
-src/unix/threadpool.c
-src/unix/timer.c
-src/unix/tty.c
-src/unix/udp.c
-src/uv-common.c
-src/uv-common.h
-src/uv-data-getter-setters.c
-"
-
-TESTS="
-test/benchmark-async-pummel.c
-test/benchmark-async.c
-test/benchmark-fs-stat.c
-test/benchmark-getaddrinfo.c
-test/benchmark-loop-count.c
-test/benchmark-million-async.c
-test/benchmark-million-timers.c
-test/benchmark-multi-accept.c
-test/benchmark-ping-pongs.c
-test/benchmark-pound.c
-test/benchmark-pump.c
-test/benchmark-sizes.c
-test/benchmark-spawn.c
-test/benchmark-tcp-write-batch.c
-test/benchmark-thread.c
-test/benchmark-udp-pummel.c
-test/blackhole-server.c
-test/dns-server.c
-test/echo-server.c
-test/run-benchmarks.c
-test/run-tests.c
-test/runner-unix.c
-test/runner-unix.h
-test/runner.c
-test/runner.h
-test/task.h
-test/test-active.c
-test/test-async.c
-test/test-barrier.c
-test/test-callback-order.c
-test/test-callback-stack.c
-test/test-condvar.c
-test/test-connection-fail.c
-test/test-cwd-and-chdir.c
-test/test-delayed-accept.c
-test/test-dlerror.c
-test/test-embed.c
-test/test-env-vars.c
-test/test-error.c
-test/test-fail-always.c
-test/test-fs-copyfile.c
-test/test-fs-event.c
-test/test-fs-poll.c
-test/test-fs.c
-test/test-getters-setters.c
-test/test-get-currentexe.c
-test/test-get-loadavg.c
-test/test-get-memory.c
-test/test-get-passwd.c
-test/test-getaddrinfo.c
-test/test-gethostname.c
-test/test-getsockname.c
-test/test-homedir.c
-test/test-hrtime.c
-test/test-idle.c
-test/test-ip6-addr.c
-test/test-ipc-send-recv.c
-test/test-ipc.c
-test/test-loop-handles.c
-test/test-multiple-listen.c
-test/test-mutexes.c
-test/test-pass-always.c
-test/test-ping-pong.c
-test/test-pipe-bind-error.c
-test/test-pipe-connect-error.c
-test/test-pipe-sendmsg.c
-test/test-pipe-server-close.c
-test/test-platform-output.c
-test/test-poll-close.c
-test/test-poll.c
-test/test-process-title.c
-test/test-process-title-threadsafe.c
-test/test-ref.c
-test/test-run-nowait.c
-test/test-run-once.c
-test/test-semaphore.c
-test/test-shutdown-close.c
-test/test-shutdown-eof.c
-test/test-signal-multiple-loops.c
-test/test-signal.c
-test/test-spawn.c
-test/test-stdio-over-pipes.c
-test/test-tcp-bind-error.c
-test/test-tcp-bind6-error.c
-test/test-tcp-close-while-connecting.c
-test/test-tcp-close-accept.c
-test/test-tcp-close.c
-test/test-tcp-connect-error-after-write.c
-test/test-tcp-connect-error.c
-test/test-tcp-connect-timeout.c
-test/test-tcp-connect6-error.c
-test/test-tcp-flags.c
-test/test-tcp-open.c
-test/test-tcp-read-stop.c
-test/test-tcp-shutdown-after-write.c
-test/test-tcp-unexpected-read.c
-test/test-tcp-oob.c
-test/test-tcp-write-error.c
-test/test-tcp-write-to-half-open-connection.c
-test/test-tcp-writealot.c
-test/test-thread.c
-test/test-threadpool-cancel.c
-test/test-threadpool.c
-test/test-timer-again.c
-test/test-timer.c
-test/test-tmpdir.c
-test/test-tty.c
-test/test-udp-dgram-too-big.c
-test/test-udp-ipv6.c
-test/test-udp-multicast-join.c
-test/test-udp-multicast-ttl.c
-test/test-udp-open.c
-test/test-udp-options.c
-test/test-udp-send-and-recv.c
-test/test-udp-send-hang-loop.c
-test/test-walk-handles.c
-test/test-watcher-cross-stop.c
-"
-
-case `uname -s` in
-AIX)
-  SPARSE_FLAGS="$SPARSE_FLAGS -D_AIX=1"
-  SOURCES="$SOURCES
-           src/unix/aix-common.c
-           src/unix/aix.c"
-  ;;
-OS400)
-  SPARSE_FLAGS="$SPARSE_FLAGS -D__PASE__=1"
-  SOURCES="$SOURCES
-           src/unix/aix-common.c
-           src/unix/ibmi.c
-           src/unix/posix-poll.c
-           src/unix/no-fsevents.c
-           src/unix/no-proctitle.c"
-  ;;
-Darwin)
-  SPARSE_FLAGS="$SPARSE_FLAGS -D__APPLE__=1"
-  SOURCES="$SOURCES
-           include/uv-bsd.h
-           src/unix/darwin.c
-           src/unix/kqueue.c
-           src/unix/fsevents.c"
-  ;;
-DragonFly)
-  SPARSE_FLAGS="$SPARSE_FLAGS -D__DragonFly__=1"
-  SOURCES="$SOURCES
-           include/uv-bsd.h
-           src/unix/kqueue.c
-           src/unix/freebsd.c"
-  ;;
-FreeBSD)
-  SPARSE_FLAGS="$SPARSE_FLAGS -D__FreeBSD__=1"
-  SOURCES="$SOURCES
-           include/uv-bsd.h
-           src/unix/kqueue.c
-           src/unix/freebsd.c"
-  ;;
-Linux)
-  SPARSE_FLAGS="$SPARSE_FLAGS -D__linux__=1"
-  SOURCES="$SOURCES
-           include/uv-linux.h
-           src/unix/linux-inotify.c
-           src/unix/linux-core.c
-           src/unix/linux-syscalls.c
-           src/unix/linux-syscalls.h"
-  ;;
-NetBSD)
-  SPARSE_FLAGS="$SPARSE_FLAGS -D__NetBSD__=1"
-  SOURCES="$SOURCES
-           include/uv-bsd.h
-           src/unix/kqueue.c
-           src/unix/netbsd.c"
-  ;;
-OpenBSD)
-  SPARSE_FLAGS="$SPARSE_FLAGS -D__OpenBSD__=1"
-  SOURCES="$SOURCES
-           include/uv-bsd.h
-           src/unix/kqueue.c
-           src/unix/openbsd.c"
-  ;;
-SunOS)
-  SPARSE_FLAGS="$SPARSE_FLAGS -D__sun=1"
-  SOURCES="$SOURCES
-           include/uv-sunos.h
-           src/unix/sunos.c"
-  ;;
-esac
-
-for ARCH in __i386__ __x86_64__ __arm__ __mips__; do
-  $SPARSE $SPARSE_FLAGS -D$ARCH=1 $SOURCES
-done
-
-# Tests are architecture independent.
-$SPARSE $SPARSE_FLAGS -Itest $TESTS
diff --git a/deps/libuv/common.gypi b/deps/libuv/common.gypi
index 572a1633b..2297bdf0f 100644
--- a/deps/libuv/common.gypi
+++ b/deps/libuv/common.gypi
@@ -134,7 +134,7 @@
           }]
         ]
       }],
-      ['OS in "freebsd dragonflybsd linux openbsd solaris android"', {
+      ['OS in "freebsd dragonflybsd linux openbsd solaris android aix"', {
         'cflags': [ '-Wall' ],
         'cflags_cc': [ '-fno-rtti', '-fno-exceptions' ],
         'target_conditions': [
@@ -162,6 +162,10 @@
             'cflags': [ '-pthread' ],
             'ldflags': [ '-pthread' ],
           }],
+          [ 'OS=="aix" and target_arch=="ppc64"', {
+            'cflags': [ '-maix64' ],
+            'ldflags': [ '-maix64' ],
+          }],
         ],
       }],
       ['OS=="mac"', {
diff --git a/deps/libuv/configure.ac b/deps/libuv/configure.ac
index 28fda9d39..aa6e6d16a 100644
--- a/deps/libuv/configure.ac
+++ b/deps/libuv/configure.ac
@@ -13,7 +13,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_PREREQ(2.57)
-AC_INIT([libuv], [1.20.1], [https://github.com/libuv/libuv/issues])
+AC_INIT([libuv], [1.22.0], [https://github.com/libuv/libuv/issues])
 AC_CONFIG_MACRO_DIR([m4])
 m4_include([m4/libuv-extra-automake-flags.m4])
 m4_include([m4/as_case.m4])
diff --git a/deps/libuv/include/uv.h b/deps/libuv/include/uv.h
index 41fad4510..a8b305793 100644
--- a/deps/libuv/include/uv.h
+++ b/deps/libuv/include/uv.h
@@ -45,21 +45,21 @@ extern "C" {
 # define UV_EXTERN /* nothing */
 #endif
 
-#include "uv-errno.h"
-#include "uv-version.h"
+#include "uv/errno.h"
+#include "uv/version.h"
 #include <stddef.h>
 #include <stdio.h>
 
 #if defined(_MSC_VER) && _MSC_VER < 1600
-# include "stdint-msvc2008.h"
+# include "uv/stdint-msvc2008.h"
 #else
 # include <stdint.h>
 #endif
 
 #if defined(_WIN32)
-# include "uv-win.h"
+# include "uv/win.h"
 #else
-# include "uv-unix.h"
+# include "uv/unix.h"
 #endif
 
 /* Expand this list if necessary. */
@@ -142,6 +142,7 @@ extern "C" {
   XX(EHOSTDOWN, "host is down")                                               \
   XX(EREMOTEIO, "remote I/O error")                                           \
   XX(ENOTTY, "inappropriate ioctl for device")                                \
+  XX(EFTYPE, "inappropriate file type or format")                             \
 
 #define UV_HANDLE_TYPE_MAP(XX)                                                \
   XX(ASYNC, async)                                                            \
@@ -369,7 +370,10 @@ typedef enum {
 UV_EXTERN int uv_translate_sys_error(int sys_errno);
 
 UV_EXTERN const char* uv_strerror(int err);
+UV_EXTERN char* uv_strerror_r(int err, char* buf, size_t buflen);
+
 UV_EXTERN const char* uv_err_name(int err);
+UV_EXTERN char* uv_err_name_r(int err, char* buf, size_t buflen);
 
 
 #define UV_REQ_FIELDS                                                         \
@@ -503,7 +507,7 @@ UV_EXTERN int uv_try_write(uv_stream_t* handle,
 struct uv_write_s {
   UV_REQ_FIELDS
   uv_write_cb cb;
-  uv_stream_t* send_handle;
+  uv_stream_t* send_handle; /* TODO: make private and unix-only in v2.x. */
   uv_stream_t* handle;
   UV_WRITE_PRIVATE_FIELDS
 };
@@ -865,7 +869,13 @@ typedef enum {
    * flags may be specified to create a duplex data stream.
    */
   UV_READABLE_PIPE  = 0x10,
-  UV_WRITABLE_PIPE  = 0x20
+  UV_WRITABLE_PIPE  = 0x20,
+
+  /*
+   * Open the child pipe handle in overlapped mode on Windows.
+   * On Unix it is silently ignored.
+   */
+  UV_OVERLAPPED_PIPE = 0x40
 } uv_stdio_flags;
 
 typedef struct uv_stdio_container_s {
@@ -997,16 +1007,18 @@ UV_EXTERN int uv_queue_work(uv_loop_t* loop,
 UV_EXTERN int uv_cancel(uv_req_t* req);
 
 
+struct uv_cpu_times_s {
+  uint64_t user;
+  uint64_t nice;
+  uint64_t sys;
+  uint64_t idle;
+  uint64_t irq;
+};
+
 struct uv_cpu_info_s {
   char* model;
   int speed;
-  struct uv_cpu_times_s {
-    uint64_t user;
-    uint64_t nice;
-    uint64_t sys;
-    uint64_t idle;
-    uint64_t irq;
-  } cpu_times;
+  struct uv_cpu_times_s cpu_times;
 };
 
 struct uv_interface_address_s {
@@ -1133,7 +1145,8 @@ typedef enum {
   UV_FS_CHOWN,
   UV_FS_FCHOWN,
   UV_FS_REALPATH,
-  UV_FS_COPYFILE
+  UV_FS_COPYFILE,
+  UV_FS_LCHOWN
 } uv_fs_type;
 
 /* uv_fs_t is a subclass of uv_req_t. */
@@ -1336,6 +1349,12 @@ UV_EXTERN int uv_fs_fchown(uv_loop_t* loop,
                            uv_uid_t uid,
                            uv_gid_t gid,
                            uv_fs_cb cb);
+UV_EXTERN int uv_fs_lchown(uv_loop_t* loop,
+                           uv_fs_t* req,
+                           const char* path,
+                           uv_uid_t uid,
+                           uv_gid_t gid,
+                           uv_fs_cb cb);
 
 
 enum uv_fs_event {
diff --git a/deps/libuv/include/uv-aix.h b/deps/libuv/include/uv/aix.h
similarity index 100%
rename from deps/libuv/include/uv-aix.h
rename to deps/libuv/include/uv/aix.h
diff --git a/deps/libuv/include/android-ifaddrs.h b/deps/libuv/include/uv/android-ifaddrs.h
similarity index 100%
rename from deps/libuv/include/android-ifaddrs.h
rename to deps/libuv/include/uv/android-ifaddrs.h
diff --git a/deps/libuv/include/uv-bsd.h b/deps/libuv/include/uv/bsd.h
similarity index 100%
rename from deps/libuv/include/uv-bsd.h
rename to deps/libuv/include/uv/bsd.h
diff --git a/deps/libuv/include/uv-darwin.h b/deps/libuv/include/uv/darwin.h
similarity index 100%
rename from deps/libuv/include/uv-darwin.h
rename to deps/libuv/include/uv/darwin.h
diff --git a/deps/libuv/include/uv-errno.h b/deps/libuv/include/uv/errno.h
similarity index 98%
rename from deps/libuv/include/uv-errno.h
rename to deps/libuv/include/uv/errno.h
index aa4d4509f..8eeb95de3 100644
--- a/deps/libuv/include/uv-errno.h
+++ b/deps/libuv/include/uv/errno.h
@@ -433,5 +433,11 @@
 # define UV__ENOTTY (-4029)
 #endif
 
+#if defined(EFTYPE) && !defined(_WIN32)
+# define UV__EFTYPE UV__ERR(EFTYPE)
+#else
+# define UV__EFTYPE (-4028)
+#endif
+
 
 #endif /* UV_ERRNO_H_ */
diff --git a/deps/libuv/include/uv-linux.h b/deps/libuv/include/uv/linux.h
similarity index 100%
rename from deps/libuv/include/uv-linux.h
rename to deps/libuv/include/uv/linux.h
diff --git a/deps/libuv/include/uv-os390.h b/deps/libuv/include/uv/os390.h
similarity index 98%
rename from deps/libuv/include/uv-os390.h
rename to deps/libuv/include/uv/os390.h
index 39e7384db..0267d74cb 100644
--- a/deps/libuv/include/uv-os390.h
+++ b/deps/libuv/include/uv/os390.h
@@ -22,7 +22,7 @@
 #ifndef UV_MVS_H
 #define UV_MVS_H
 
-#define UV_PLATFORM_SEM_T int
+#define UV_PLATFORM_SEM_T long
 
 #define UV_PLATFORM_LOOP_FIELDS                                               \
   void* ep;                                                                   \
diff --git a/deps/libuv/include/uv-posix.h b/deps/libuv/include/uv/posix.h
similarity index 100%
rename from deps/libuv/include/uv-posix.h
rename to deps/libuv/include/uv/posix.h
diff --git a/deps/libuv/include/pthread-barrier.h b/deps/libuv/include/uv/pthread-barrier.h
similarity index 100%
rename from deps/libuv/include/pthread-barrier.h
rename to deps/libuv/include/uv/pthread-barrier.h
diff --git a/deps/libuv/include/stdint-msvc2008.h b/deps/libuv/include/uv/stdint-msvc2008.h
similarity index 100%
rename from deps/libuv/include/stdint-msvc2008.h
rename to deps/libuv/include/uv/stdint-msvc2008.h
diff --git a/deps/libuv/include/uv-sunos.h b/deps/libuv/include/uv/sunos.h
similarity index 100%
rename from deps/libuv/include/uv-sunos.h
rename to deps/libuv/include/uv/sunos.h
diff --git a/deps/libuv/include/uv-threadpool.h b/deps/libuv/include/uv/threadpool.h
similarity index 100%
rename from deps/libuv/include/uv-threadpool.h
rename to deps/libuv/include/uv/threadpool.h
diff --git a/deps/libuv/include/tree.h b/deps/libuv/include/uv/tree.h
similarity index 100%
rename from deps/libuv/include/tree.h
rename to deps/libuv/include/uv/tree.h
diff --git a/deps/libuv/include/uv-unix.h b/deps/libuv/include/uv/unix.h
similarity index 98%
rename from deps/libuv/include/uv-unix.h
rename to deps/libuv/include/uv/unix.h
index 480a0691e..74a0d643c 100644
--- a/deps/libuv/include/uv-unix.h
+++ b/deps/libuv/include/uv/unix.h
@@ -42,32 +42,32 @@
 #include <pthread.h>
 #include <signal.h>
 
-#include "uv-threadpool.h"
+#include "uv/threadpool.h"
 
 #if defined(__linux__)
-# include "uv-linux.h"
+# include "uv/linux.h"
 #elif defined (__MVS__)
-# include "uv-os390.h"
+# include "uv/os390.h"
 #elif defined(__PASE__)
-# include "uv-posix.h"
+# include "uv/posix.h"
 #elif defined(_AIX)
-# include "uv-aix.h"
+# include "uv/aix.h"
 #elif defined(__sun)
-# include "uv-sunos.h"
+# include "uv/sunos.h"
 #elif defined(__APPLE__)
-# include "uv-darwin.h"
+# include "uv/darwin.h"
 #elif defined(__DragonFly__)       || \
       defined(__FreeBSD__)         || \
       defined(__FreeBSD_kernel__)  || \
       defined(__OpenBSD__)         || \
       defined(__NetBSD__)
-# include "uv-bsd.h"
+# include "uv/bsd.h"
 #elif defined(__CYGWIN__) || defined(__MSYS__)
-# include "uv-posix.h"
+# include "uv/posix.h"
 #endif
 
 #ifndef PTHREAD_BARRIER_SERIAL_THREAD
-# include "pthread-barrier.h"
+# include "uv/pthread-barrier.h"
 #endif
 
 #ifndef NI_MAXHOST
diff --git a/deps/libuv/include/uv-version.h b/deps/libuv/include/uv/version.h
similarity index 97%
rename from deps/libuv/include/uv-version.h
rename to deps/libuv/include/uv/version.h
index de8f3f339..a990137f8 100644
--- a/deps/libuv/include/uv-version.h
+++ b/deps/libuv/include/uv/version.h
@@ -31,8 +31,8 @@
  */
 
 #define UV_VERSION_MAJOR 1
-#define UV_VERSION_MINOR 20
-#define UV_VERSION_PATCH 1
+#define UV_VERSION_MINOR 22
+#define UV_VERSION_PATCH 0
 #define UV_VERSION_IS_RELEASE 1
 #define UV_VERSION_SUFFIX ""
 
diff --git a/deps/libuv/include/uv-win.h b/deps/libuv/include/uv/win.h
similarity index 95%
rename from deps/libuv/include/uv-win.h
rename to deps/libuv/include/uv/win.h
index 4c6c50a29..d6b8b3a7f 100644
--- a/deps/libuv/include/uv-win.h
+++ b/deps/libuv/include/uv/win.h
@@ -53,13 +53,13 @@ typedef struct pollfd {
 #include <sys/stat.h>
 
 #if defined(_MSC_VER) && _MSC_VER < 1600
-# include "stdint-msvc2008.h"
+# include "uv/stdint-msvc2008.h"
 #else
 # include <stdint.h>
 #endif
 
-#include "tree.h"
-#include "uv-threadpool.h"
+#include "uv/tree.h"
+#include "uv/threadpool.h"
 
 #define MAX_PIPENAME_LEN 256
 
@@ -86,8 +86,8 @@ typedef struct pollfd {
 #define SIGKILL               9
 #define SIGWINCH             28
 
-/* The CRT defines SIGABRT_COMPAT as 6, which equals SIGABRT on many */
-/* unix-like platforms. However MinGW doesn't define it, so we do. */
+/* The CRT defines SIGABRT_COMPAT as 6, which equals SIGABRT on many unix-like
+ * platforms. However MinGW doesn't define it, so we do. */
 #ifndef SIGABRT_COMPAT
 # define SIGABRT_COMPAT       6
 #endif
@@ -244,7 +244,7 @@ typedef union {
     CRITICAL_SECTION waiters_count_lock;
     HANDLE signal_event;
     HANDLE broadcast_event;
-  } fallback;
+  } unused_; /* TODO: retained for ABI compatibility; remove me in v2.x. */
 } uv_cond_t;
 
 typedef union {
@@ -308,8 +308,6 @@ typedef struct {
   char* errmsg;
 } uv_lib_t;
 
-RB_HEAD(uv_timer_tree_s, uv_timer_s);
-
 #define UV_LOOP_PRIVATE_FIELDS                                                \
     /* The loop's I/O completion port */                                      \
   HANDLE iocp;                                                                \
@@ -321,8 +319,8 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
   uv_req_t* pending_reqs_tail;                                                \
   /* Head of a single-linked list of closed handles */                        \
   uv_handle_t* endgame_handles;                                               \
-  /* The head of the timers tree */                                           \
-  struct uv_timer_tree_s timers;                                              \
+  /* TODO(bnoordhuis) Stop heap-allocating |timer_heap| in libuv v2.x. */     \
+  void* timer_heap;                                                           \
     /* Lists of active loop (prepare / check / idle) watchers */              \
   uv_prepare_t* prepare_handles;                                              \
   uv_check_t* check_handles;                                                  \
@@ -368,10 +366,10 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
   } u;                                                                        \
   struct uv_req_s* next_req;
 
-#define UV_WRITE_PRIVATE_FIELDS                                               \
-  int ipc_header;                                                             \
-  uv_buf_t write_buffer;                                                      \
-  HANDLE event_handle;                                                        \
+#define UV_WRITE_PRIVATE_FIELDS \
+  int coalesced;                \
+  uv_buf_t write_buffer;        \
+  HANDLE event_handle;          \
   HANDLE wait_handle;
 
 #define UV_CONNECT_PRIVATE_FIELDS                                             \
@@ -459,16 +457,17 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
 
 #define uv_pipe_connection_fields                                             \
   uv_timer_t* eof_timer;                                                      \
-  uv_write_t ipc_header_write_req;                                            \
-  int ipc_pid;                                                                \
-  uint64_t remaining_ipc_rawdata_bytes;                                       \
-  struct {                                                                    \
-    void* queue[2];                                                           \
-    int queue_len;                                                            \
-  } pending_ipc_info;                                                         \
+  uv_write_t dummy; /* TODO: retained for ABI compat; remove this in v2.x. */ \
+  DWORD ipc_remote_pid;                                                       \
+  union {                                                                     \
+    uint32_t payload_remaining;                                               \
+    uint64_t dummy; /* TODO: retained for ABI compat; remove this in v2.x. */ \
+  } ipc_data_frame;                                                           \
+  void* ipc_xfer_queue[2];                                                    \
+  int ipc_xfer_queue_length;                                                  \
   uv_write_t* non_overlapped_writes_tail;                                     \
-  uv_mutex_t readfile_mutex;                                                  \
-  volatile HANDLE readfile_thread;
+  CRITICAL_SECTION readfile_thread_lock;                                      \
+  volatile HANDLE readfile_thread_handle;
 
 #define UV_PIPE_PRIVATE_FIELDS                                                \
   HANDLE handle;                                                              \
@@ -478,8 +477,8 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
     struct { uv_pipe_connection_fields } conn;                                \
   } pipe;
 
-/* TODO: put the parser states in an union - TTY handles are always */
-/* half-duplex so read-state can safely overlap write-state. */
+/* TODO: put the parser states in an union - TTY handles are always half-duplex
+ * so read-state can safely overlap write-state. */
 #define UV_TTY_PRIVATE_FIELDS                                                 \
   HANDLE handle;                                                              \
   union {                                                                     \
@@ -528,8 +527,9 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
   unsigned char events;
 
 #define UV_TIMER_PRIVATE_FIELDS                                               \
-  RB_ENTRY(uv_timer_s) tree_entry;                                            \
-  uint64_t due;                                                               \
+  void* heap_node[3];                                                         \
+  int unused;                                                                 \
+  uint64_t timeout;                                                           \
   uint64_t repeat;                                                            \
   uint64_t start_id;                                                          \
   uv_timer_cb timer_cb;
diff --git a/deps/libuv/libuv.pc.in b/deps/libuv/libuv.pc.in
index 55c4b65d5..1d7b86f75 100644
--- a/deps/libuv/libuv.pc.in
+++ b/deps/libuv/libuv.pc.in
@@ -3,7 +3,7 @@ exec_prefix=${prefix}
 libdir=@libdir@
 includedir=@includedir@
 
-Name: @PACKAGE_NAME@
+Name: libuv
 Version: @PACKAGE_VERSION@
 Description: multi-platform support library with a focus on asynchronous I/O.
 URL: http://libuv.org/
diff --git a/deps/libuv/m4/libuv-check-flags.m4 b/deps/libuv/m4/libuv-check-flags.m4
index 59c306355..e347056ae 100644
--- a/deps/libuv/m4/libuv-check-flags.m4
+++ b/deps/libuv/m4/libuv-check-flags.m4
@@ -1,5 +1,5 @@
 dnl Macros to check the presence of generic (non-typed) symbols.
-dnl Copyright (c) 2006-2008 Diego Pettenà <flameeyes gmail com>
+dnl Copyright (c) 2006-2008 Diego Pettenò <flameeyes gmail com>
 dnl Copyright (c) 2006-2008 xine project
 dnl
 dnl This program is free software; you can redistribute it and/or modify
@@ -316,4 +316,4 @@ AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
      AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX], [$cc_cv_attribute_aligned],
        [Define the highest alignment supported])
   fi
-])
\ No newline at end of file
+])
diff --git a/deps/libuv/src/fs-poll.c b/deps/libuv/src/fs-poll.c
index ee73d5a2e..6c82dfc1d 100644
--- a/deps/libuv/src/fs-poll.c
+++ b/deps/libuv/src/fs-poll.c
@@ -83,7 +83,7 @@ int uv_fs_poll_start(uv_fs_poll_t* handle,
   if (err < 0)
     goto error;
 
-  ctx->timer_handle.flags |= UV__HANDLE_INTERNAL;
+  ctx->timer_handle.flags |= UV_HANDLE_INTERNAL;
   uv__handle_unref(&ctx->timer_handle);
 
   err = uv_fs_stat(loop, &ctx->fs_req, ctx->path, poll_cb);
@@ -248,7 +248,7 @@ static int statbuf_eq(const uv_stat_t* a, const uv_stat_t* b) {
 #include "win/handle-inl.h"
 
 void uv__fs_poll_endgame(uv_loop_t* loop, uv_fs_poll_t* handle) {
-  assert(handle->flags & UV__HANDLE_CLOSING);
+  assert(handle->flags & UV_HANDLE_CLOSING);
   assert(!(handle->flags & UV_HANDLE_CLOSED));
   uv__handle_close(handle);
 }
diff --git a/deps/libuv/src/inet.c b/deps/libuv/src/inet.c
index da63a688c..4598ca1e9 100644
--- a/deps/libuv/src/inet.c
+++ b/deps/libuv/src/inet.c
@@ -19,7 +19,7 @@
 #include <string.h>
 
 #if defined(_MSC_VER) && _MSC_VER < 1600
-# include "stdint-msvc2008.h"
+# include "uv/stdint-msvc2008.h"
 #else
 # include <stdint.h>
 #endif
diff --git a/deps/libuv/src/unix/timer.c b/deps/libuv/src/timer.c
similarity index 92%
rename from deps/libuv/src/unix/timer.c
rename to deps/libuv/src/timer.c
index 54dabfe7d..2bf449a73 100644
--- a/deps/libuv/src/unix/timer.c
+++ b/deps/libuv/src/timer.c
@@ -19,13 +19,22 @@
  */
 
 #include "uv.h"
-#include "internal.h"
+#include "uv-common.h"
 #include "heap-inl.h"
 
 #include <assert.h>
 #include <limits.h>
 
 
+static struct heap *timer_heap(const uv_loop_t* loop) {
+#ifdef _WIN32
+  return (struct heap*) loop->timer_heap;
+#else
+  return (struct heap*) &loop->timer_heap;
+#endif
+}
+
+
 static int timer_less_than(const struct heap_node* ha,
                            const struct heap_node* hb) {
   const uv_timer_t* a;
@@ -81,7 +90,7 @@ int uv_timer_start(uv_timer_t* handle,
   /* start_id is the second index to be compared in uv__timer_cmp() */
   handle->start_id = handle->loop->timer_counter++;
 
-  heap_insert((struct heap*) &handle->loop->timer_heap,
+  heap_insert(timer_heap(handle->loop),
               (struct heap_node*) &handle->heap_node,
               timer_less_than);
   uv__handle_start(handle);
@@ -94,7 +103,7 @@ int uv_timer_stop(uv_timer_t* handle) {
   if (!uv__is_active(handle))
     return 0;
 
-  heap_remove((struct heap*) &handle->loop->timer_heap,
+  heap_remove(timer_heap(handle->loop),
               (struct heap_node*) &handle->heap_node,
               timer_less_than);
   uv__handle_stop(handle);
@@ -131,7 +140,7 @@ int uv__next_timeout(const uv_loop_t* loop) {
   const uv_timer_t* handle;
   uint64_t diff;
 
-  heap_node = heap_min((const struct heap*) &loop->timer_heap);
+  heap_node = heap_min(timer_heap(loop));
   if (heap_node == NULL)
     return -1; /* block indefinitely */
 
@@ -152,7 +161,7 @@ void uv__run_timers(uv_loop_t* loop) {
   uv_timer_t* handle;
 
   for (;;) {
-    heap_node = heap_min((struct heap*) &loop->timer_heap);
+    heap_node = heap_min(timer_heap(loop));
     if (heap_node == NULL)
       break;
 
diff --git a/deps/libuv/src/unix/android-ifaddrs.c b/deps/libuv/src/unix/android-ifaddrs.c
index bf30b1417..99fb25a43 100644
--- a/deps/libuv/src/unix/android-ifaddrs.c
+++ b/deps/libuv/src/unix/android-ifaddrs.c
@@ -23,7 +23,7 @@ ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
-#include "android-ifaddrs.h"
+#include "uv/android-ifaddrs.h"
 #include "uv-common.h"
 
 #include <string.h>
diff --git a/deps/libuv/src/unix/core.c b/deps/libuv/src/unix/core.c
index 18c8fcd80..066c9bee3 100644
--- a/deps/libuv/src/unix/core.c
+++ b/deps/libuv/src/unix/core.c
@@ -116,7 +116,7 @@ uint64_t uv_hrtime(void) {
 void uv_close(uv_handle_t* handle, uv_close_cb close_cb) {
   assert(!uv__is_closing(handle));
 
-  handle->flags |= UV_CLOSING;
+  handle->flags |= UV_HANDLE_CLOSING;
   handle->close_cb = close_cb;
 
   switch (handle->type) {
@@ -174,8 +174,8 @@ void uv_close(uv_handle_t* handle, uv_close_cb close_cb) {
 
   case UV_SIGNAL:
     uv__signal_close((uv_signal_t*) handle);
-    /* Signal handles may not be closed immediately. The signal code will */
-    /* itself close uv__make_close_pending whenever appropriate. */
+    /* Signal handles may not be closed immediately. The signal code will
+     * itself close uv__make_close_pending whenever appropriate. */
     return;
 
   default:
@@ -214,8 +214,8 @@ int uv__socket_sockopt(uv_handle_t* handle, int optname, int* value) {
 }
 
 void uv__make_close_pending(uv_handle_t* handle) {
-  assert(handle->flags & UV_CLOSING);
-  assert(!(handle->flags & UV_CLOSED));
+  assert(handle->flags & UV_HANDLE_CLOSING);
+  assert(!(handle->flags & UV_HANDLE_CLOSED));
   handle->next_closing = handle->loop->closing_handles;
   handle->loop->closing_handles = handle;
 }
@@ -241,15 +241,17 @@ int uv__getiovmax(void) {
 
 
 static void uv__finish_close(uv_handle_t* handle) {
-  /* Note: while the handle is in the UV_CLOSING state now, it's still possible
-   * for it to be active in the sense that uv__is_active() returns true.
+  /* Note: while the handle is in the UV_HANDLE_CLOSING state now, it's still
+   * possible for it to be active in the sense that uv__is_active() returns
+   * true.
+   *
    * A good example is when the user calls uv_shutdown(), immediately followed
    * by uv_close(). The handle is considered active at this point because the
    * completion of the shutdown req is still pending.
    */
-  assert(handle->flags & UV_CLOSING);
-  assert(!(handle->flags & UV_CLOSED));
-  handle->flags |= UV_CLOSED;
+  assert(handle->flags & UV_HANDLE_CLOSING);
+  assert(!(handle->flags & UV_HANDLE_CLOSED));
+  handle->flags |= UV_HANDLE_CLOSED;
 
   switch (handle->type) {
     case UV_PREPARE:
@@ -927,6 +929,11 @@ int uv__io_active(const uv__io_t* w, unsigned int events) {
 }
 
 
+int uv__fd_exists(uv_loop_t* loop, int fd) {
+  return (unsigned) fd < loop->nwatchers && loop->watchers[fd] != NULL;
+}
+
+
 int uv_getrusage(uv_rusage_t* rusage) {
   struct rusage usage;
 
diff --git a/deps/libuv/src/unix/fs.c b/deps/libuv/src/unix/fs.c
index de678733a..652cdfd73 100644
--- a/deps/libuv/src/unix/fs.c
+++ b/deps/libuv/src/unix/fs.c
@@ -865,9 +865,11 @@ static ssize_t uv__fs_copyfile(uv_fs_t* req) {
       /* If an error occurred that the sendfile fallback also won't handle, or
          this is a force clone then exit. Otherwise, fall through to try using
          sendfile(). */
-      if ((errno != ENOTTY && errno != EOPNOTSUPP && errno != EXDEV) ||
-          req->flags & UV_FS_COPYFILE_FICLONE_FORCE) {
-        err = -errno;
+      if (errno != ENOTTY && errno != EOPNOTSUPP && errno != EXDEV) {
+        err = UV__ERR(errno);
+        goto out;
+      } else if (req->flags & UV_FS_COPYFILE_FICLONE_FORCE) {
+        err = UV_ENOTSUP;
         goto out;
       }
     } else {
@@ -927,7 +929,11 @@ static ssize_t uv__fs_copyfile(uv_fs_t* req) {
     }
   }
 
-  return result;
+  if (result == 0)
+    return 0;
+
+  errno = UV__ERR(result);
+  return -1;
 #endif
 }
 
@@ -1114,6 +1120,7 @@ static void uv__fs_work(struct uv__work* w) {
     X(COPYFILE, uv__fs_copyfile(req));
     X(FCHMOD, fchmod(req->file, req->mode));
     X(FCHOWN, fchown(req->file, req->uid, req->gid));
+    X(LCHOWN, lchown(req->path, req->uid, req->gid));
     X(FDATASYNC, uv__fs_fdatasync(req));
     X(FSTAT, uv__fs_fstat(req->file, &req->statbuf));
     X(FSYNC, uv__fs_fsync(req));
@@ -1240,6 +1247,20 @@ int uv_fs_fchown(uv_loop_t* loop,
 }
 
 
+int uv_fs_lchown(uv_loop_t* loop,
+                 uv_fs_t* req,
+                 const char* path,
+                 uv_uid_t uid,
+                 uv_gid_t gid,
+                 uv_fs_cb cb) {
+  INIT(LCHOWN);
+  PATH;
+  req->uid = uid;
+  req->gid = gid;
+  POST;
+}
+
+
 int uv_fs_fdatasync(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
   INIT(FDATASYNC);
   req->file = file;
diff --git a/deps/libuv/src/unix/fsevents.c b/deps/libuv/src/unix/fsevents.c
index 47d8024b6..ee45299b7 100644
--- a/deps/libuv/src/unix/fsevents.c
+++ b/deps/libuv/src/unix/fsevents.c
@@ -836,7 +836,7 @@ int uv__fsevents_init(uv_fs_event_t* handle) {
 
   handle->cf_cb->data = handle;
   uv_async_init(handle->loop, handle->cf_cb, uv__fsevents_cb);
-  handle->cf_cb->flags |= UV__HANDLE_INTERNAL;
+  handle->cf_cb->flags |= UV_HANDLE_INTERNAL;
   uv_unref((uv_handle_t*) handle->cf_cb);
 
   err = uv_mutex_init(&handle->cf_mutex);
diff --git a/deps/libuv/src/unix/internal.h b/deps/libuv/src/unix/internal.h
index b6df1ab9d..cd7903710 100644
--- a/deps/libuv/src/unix/internal.h
+++ b/deps/libuv/src/unix/internal.h
@@ -127,26 +127,6 @@ int uv__pthread_sigmask(int how, const sigset_t* set, sigset_t* oset);
 
 typedef struct uv__stream_queued_fds_s uv__stream_queued_fds_t;
 
-/* handle flags */
-enum {
-  UV_CLOSING              = 0x01,   /* uv_close() called but not finished. */
-  UV_CLOSED               = 0x02,   /* close(2) finished. */
-  UV_STREAM_READING       = 0x04,   /* uv_read_start() called. */
-  UV_STREAM_SHUTTING      = 0x08,   /* uv_shutdown() called but not complete. */
-  UV_STREAM_SHUT          = 0x10,   /* Write side closed. */
-  UV_STREAM_READABLE      = 0x20,   /* The stream is readable */
-  UV_STREAM_WRITABLE      = 0x40,   /* The stream is writable */
-  UV_STREAM_BLOCKING      = 0x80,   /* Synchronous writes. */
-  UV_STREAM_READ_PARTIAL  = 0x100,  /* read(2) read less than requested. */
-  UV_STREAM_READ_EOF      = 0x200,  /* read(2) read EOF. */
-  UV_TCP_NODELAY          = 0x400,  /* Disable Nagle. */
-  UV_TCP_KEEPALIVE        = 0x800,  /* Turn on keep-alive. */
-  UV_TCP_SINGLE_ACCEPT    = 0x1000, /* Only accept() when idle. */
-  UV_HANDLE_IPV6          = 0x10000, /* Handle is bound to a IPv6 socket. */
-  UV_UDP_PROCESSING       = 0x20000, /* Handle is running the send callback queue. */
-  UV_HANDLE_BOUND         = 0x40000  /* Handle is bound to an address and port */
-};
-
 /* loop flags */
 enum {
   UV_LOOP_BLOCK_SIGPROF = 1
@@ -185,6 +165,18 @@ struct uv__stream_queued_fds_s {
 #define uv__nonblock uv__nonblock_fcntl
 #endif
 
+/* On Linux, uv__nonblock_fcntl() and uv__nonblock_ioctl() do not commute
+ * when O_NDELAY is not equal to O_NONBLOCK.  Case in point: linux/sparc32
+ * and linux/sparc64, where O_NDELAY is O_NONBLOCK + another bit.
+ *
+ * Libuv uses uv__nonblock_fcntl() directly sometimes so ensure that it
+ * commutes with uv__nonblock().
+ */
+#if defined(__linux__) && O_NDELAY != O_NONBLOCK
+#undef uv__nonblock
+#define uv__nonblock uv__nonblock_fcntl
+#endif
+
 /* core */
 int uv__cloexec_ioctl(int fd, int set);
 int uv__cloexec_fcntl(int fd, int set);
@@ -207,6 +199,7 @@ int uv__io_active(const uv__io_t* w, unsigned int events);
 int uv__io_check_fd(uv_loop_t* loop, int fd);
 void uv__io_poll(uv_loop_t* loop, int timeout); /* in milliseconds or -1 */
 int uv__io_fork(uv_loop_t* loop);
+int uv__fd_exists(uv_loop_t* loop, int fd);
 
 /* async */
 void uv__async_stop(uv_loop_t* loop);
@@ -239,10 +232,6 @@ int uv__tcp_keepalive(int fd, int on, unsigned int delay);
 /* pipe */
 int uv_pipe_listen(uv_pipe_t* handle, int backlog, uv_connection_cb cb);
 
-/* timer */
-void uv__run_timers(uv_loop_t* loop);
-int uv__next_timeout(const uv_loop_t* loop);
-
 /* signal */
 void uv__signal_close(uv_signal_t* handle);
 void uv__signal_global_once_init(void);
@@ -267,7 +256,6 @@ void uv__prepare_close(uv_prepare_t* handle);
 void uv__process_close(uv_process_t* handle);
 void uv__stream_close(uv_stream_t* handle);
 void uv__tcp_close(uv_tcp_t* handle);
-void uv__timer_close(uv_timer_t* handle);
 void uv__udp_close(uv_udp_t* handle);
 void uv__udp_finish_close(uv_udp_t* handle);
 uv_handle_type uv__handle_type(int fd);
diff --git a/deps/libuv/src/unix/kqueue.c b/deps/libuv/src/unix/kqueue.c
index a30fd730f..930f2da71 100644
--- a/deps/libuv/src/unix/kqueue.c
+++ b/deps/libuv/src/unix/kqueue.c
@@ -261,8 +261,8 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
       w = loop->watchers[fd];
 
       if (w == NULL) {
-        /* File descriptor that we've stopped watching, disarm it. */
-        /* TODO batch up */
+        /* File descriptor that we've stopped watching, disarm it.
+         * TODO: batch up. */
         struct kevent events[1];
 
         EV_SET(events + 0, fd, ev->filter, EV_DELETE, 0, 0, 0);
diff --git a/deps/libuv/src/unix/linux-core.c b/deps/libuv/src/unix/linux-core.c
index b63c25f3c..d09bbcdd6 100644
--- a/deps/libuv/src/unix/linux-core.c
+++ b/deps/libuv/src/unix/linux-core.c
@@ -51,7 +51,7 @@
 
 #ifdef HAVE_IFADDRS_H
 # if defined(__ANDROID__)
-#  include "android-ifaddrs.h"
+#  include "uv/android-ifaddrs.h"
 # else
 #  include <ifaddrs.h>
 # endif
@@ -388,7 +388,8 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
        * free when we switch over to edge-triggered I/O.
        */
       if (pe->events == POLLERR || pe->events == POLLHUP)
-        pe->events |= w->pevents & (POLLIN | POLLOUT | UV__POLLPRI);
+        pe->events |=
+          w->pevents & (POLLIN | POLLOUT | UV__POLLRDHUP | UV__POLLPRI);
 
       if (pe->events != 0) {
         /* Run signal watchers last.  This also affects child process watchers
diff --git a/deps/libuv/src/unix/linux-inotify.c b/deps/libuv/src/unix/linux-inotify.c
index bcad630fa..7797f8425 100644
--- a/deps/libuv/src/unix/linux-inotify.c
+++ b/deps/libuv/src/unix/linux-inotify.c
@@ -19,7 +19,7 @@
  */
 
 #include "uv.h"
-#include "tree.h"
+#include "uv/tree.h"
 #include "internal.h"
 
 #include <stdint.h>
diff --git a/deps/libuv/src/unix/loop.c b/deps/libuv/src/unix/loop.c
index 99ead6cbc..c2a03d770 100644
--- a/deps/libuv/src/unix/loop.c
+++ b/deps/libuv/src/unix/loop.c
@@ -20,7 +20,7 @@
  */
 
 #include "uv.h"
-#include "tree.h"
+#include "uv/tree.h"
 #include "internal.h"
 #include "heap-inl.h"
 #include <stdlib.h>
@@ -74,7 +74,7 @@ int uv_loop_init(uv_loop_t* loop) {
     goto fail_signal_init;
 
   uv__handle_unref(&loop->child_watcher);
-  loop->child_watcher.flags |= UV__HANDLE_INTERNAL;
+  loop->child_watcher.flags |= UV_HANDLE_INTERNAL;
   QUEUE_INIT(&loop->process_handles);
 
   err = uv_rwlock_init(&loop->cloexec_lock);
@@ -90,7 +90,7 @@ int uv_loop_init(uv_loop_t* loop) {
     goto fail_async_init;
 
   uv__handle_unref(&loop->wq_async);
-  loop->wq_async.flags |= UV__HANDLE_INTERNAL;
+  loop->wq_async.flags |= UV_HANDLE_INTERNAL;
 
   return 0;
 
diff --git a/deps/libuv/src/unix/os390-syscalls.c b/deps/libuv/src/unix/os390-syscalls.c
index 21558ea86..1040d6697 100644
--- a/deps/libuv/src/unix/os390-syscalls.c
+++ b/deps/libuv/src/unix/os390-syscalls.c
@@ -141,7 +141,7 @@ static void init_message_queue(uv__os390_epoll* lst) {
   } msg;
 
   /* initialize message queue */
-  lst->msg_queue = msgget(IPC_PRIVATE, 0622 | IPC_CREAT);
+  lst->msg_queue = msgget(IPC_PRIVATE, 0600 | IPC_CREAT);
   if (lst->msg_queue == -1)
     abort();
 
@@ -215,6 +215,7 @@ uv__os390_epoll* epoll_create1(int flags) {
     maybe_resize(lst, 1);
     lst->items[lst->size - 1].fd = lst->msg_queue;
     lst->items[lst->size - 1].events = POLLIN;
+    lst->items[lst->size - 1].revents = 0;
     uv_once(&once, epoll_init);
     uv_mutex_lock(&global_epoll_lock);
     QUEUE_INSERT_TAIL(&global_epoll_queue, &lst->member);
@@ -252,13 +253,15 @@ int epoll_ctl(uv__os390_epoll* lst,
     }
     lst->items[fd].fd = fd;
     lst->items[fd].events = event->events;
+    lst->items[fd].revents = 0;
   } else if (op == EPOLL_CTL_MOD) {
-    if (fd >= lst->size || lst->items[fd].fd == -1) {
+    if (fd >= lst->size - 1 || lst->items[fd].fd == -1) {
       uv_mutex_unlock(&global_epoll_lock);
       errno = ENOENT;
       return -1;
     }
     lst->items[fd].events = event->events;
+    lst->items[fd].revents = 0;
   } else
     abort();
 
@@ -273,8 +276,9 @@ int epoll_wait(uv__os390_epoll* lst, struct epoll_event* events,
   struct pollfd* pfds;
   int pollret;
   int reventcount;
+  int nevents;
 
-  size = _SET_FDS_MSGS(size, 1, lst->size - 1);
+  _SET_FDS_MSGS(size, 1, lst->size - 1);
   pfds = lst->items;
   pollret = poll(pfds, size, timeout);
   if (pollret <= 0)
@@ -283,19 +287,28 @@ int epoll_wait(uv__os390_epoll* lst, struct epoll_event* events,
   pollret = _NFDS(pollret) + _NMSGS(pollret);
 
   reventcount = 0;
+  nevents = 0;
   for (int i = 0; 
        i < lst->size && i < maxevents && reventcount < pollret; ++i) {
     struct epoll_event ev;
+    struct pollfd* pfd;
 
-    if (pfds[i].fd == -1 || pfds[i].revents == 0)
+    pfd = &pfds[i];
+    if (pfd->fd == -1 || pfd->revents == 0)
       continue;
 
-    ev.fd = pfds[i].fd;
-    ev.events = pfds[i].revents;
-    events[reventcount++] = ev;
+    ev.fd = pfd->fd;
+    ev.events = pfd->revents;
+    if (pfd->revents & POLLIN && pfd->revents & POLLOUT)
+      reventcount += 2;
+    else if (pfd->revents & (POLLIN | POLLOUT))
+      ++reventcount;
+
+    pfd->revents = 0;
+    events[nevents++] = ev;
   }
 
-  return reventcount;
+  return nevents;
 }
 
 
@@ -491,7 +504,7 @@ ssize_t os390_readlink(const char* path, char* buf, size_t len) {
 
 
 size_t strnlen(const char* str, size_t maxlen) {
-  void* p = memchr(str, 0, maxlen);
+  char* p = memchr(str, 0, maxlen);
   if (p == NULL)
     return maxlen;
   else
diff --git a/deps/libuv/src/unix/pipe.c b/deps/libuv/src/unix/pipe.c
index 2c578dcb3..0718bc81b 100644
--- a/deps/libuv/src/unix/pipe.c
+++ b/deps/libuv/src/unix/pipe.c
@@ -134,6 +134,9 @@ void uv__pipe_close(uv_pipe_t* handle) {
 int uv_pipe_open(uv_pipe_t* handle, uv_file fd) {
   int err;
 
+  if (uv__fd_exists(handle->loop, fd))
+    return UV_EEXIST;
+
   err = uv__nonblock(fd, 1);
   if (err)
     return err;
@@ -146,7 +149,7 @@ int uv_pipe_open(uv_pipe_t* handle, uv_file fd) {
 
   return uv__stream_open((uv_stream_t*)handle,
                          fd,
-                         UV_STREAM_READABLE | UV_STREAM_WRITABLE);
+                         UV_HANDLE_READABLE | UV_HANDLE_WRITABLE);
 }
 
 
@@ -196,7 +199,7 @@ void uv_pipe_connect(uv_connect_t* req,
   if (new_sock) {
     err = uv__stream_open((uv_stream_t*)handle,
                           uv__stream_fd(handle),
-                          UV_STREAM_READABLE | UV_STREAM_WRITABLE);
+                          UV_HANDLE_READABLE | UV_HANDLE_WRITABLE);
   }
 
   if (err == 0)
diff --git a/deps/libuv/src/unix/poll.c b/deps/libuv/src/unix/poll.c
index f3b0bf4e4..3d5022b22 100644
--- a/deps/libuv/src/unix/poll.c
+++ b/deps/libuv/src/unix/poll.c
@@ -68,6 +68,9 @@ static void uv__poll_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
 int uv_poll_init(uv_loop_t* loop, uv_poll_t* handle, int fd) {
   int err;
 
+  if (uv__fd_exists(loop, fd))
+    return UV_EEXIST;
+
   err = uv__io_check_fd(loop, fd);
   if (err)
     return err;
diff --git a/deps/libuv/src/unix/process.c b/deps/libuv/src/unix/process.c
index 3a3cfd6f0..101c9c53d 100644
--- a/deps/libuv/src/unix/process.c
+++ b/deps/libuv/src/unix/process.c
@@ -239,9 +239,9 @@ static int uv__process_open_stream(uv_stdio_container_t* container,
 
   flags = 0;
   if (container->flags & UV_WRITABLE_PIPE)
-    flags |= UV_STREAM_READABLE;
+    flags |= UV_HANDLE_READABLE;
   if (container->flags & UV_READABLE_PIPE)
-    flags |= UV_STREAM_WRITABLE;
+    flags |= UV_HANDLE_WRITABLE;
 
   return uv__stream_open(container->data.stream, pipefds[0], flags);
 }
diff --git a/deps/libuv/src/unix/signal.c b/deps/libuv/src/unix/signal.c
index b9d0a5608..01aa55f3f 100644
--- a/deps/libuv/src/unix/signal.c
+++ b/deps/libuv/src/unix/signal.c
@@ -54,8 +54,7 @@ static void uv__signal_unregister_handler(int signum);
 static uv_once_t uv__signal_global_init_guard = UV_ONCE_INIT;
 static struct uv__signal_tree_s uv__signal_tree =
     RB_INITIALIZER(uv__signal_tree);
-static int uv__signal_lock_pipefd[2];
-
+static int uv__signal_lock_pipefd[2] = { -1, -1 };
 
 RB_GENERATE_STATIC(uv__signal_tree_s,
                    uv_signal_s, tree_entry,
@@ -64,7 +63,7 @@ RB_GENERATE_STATIC(uv__signal_tree_s,
 static void uv__signal_global_reinit(void);
 
 static void uv__signal_global_init(void) {
-  if (!uv__signal_lock_pipefd[0])
+  if (uv__signal_lock_pipefd[0] == -1)
     /* pthread_atfork can register before and after handlers, one
      * for each child. This only registers one for the child. That
      * state is both persistent and cumulative, so if we keep doing
@@ -74,15 +73,11 @@ static void uv__signal_global_init(void) {
     if (pthread_atfork(NULL, NULL, &uv__signal_global_reinit))
       abort();
 
-  if (uv__make_pipe(uv__signal_lock_pipefd, 0))
-    abort();
-
-  if (uv__signal_unlock())
-    abort();
+  uv__signal_global_reinit();
 }
 
 
-static void uv__signal_global_reinit(void) {
+UV_DESTRUCTOR(static void uv__signal_global_fini(void)) {
   /* We can only use signal-safe functions here.
    * That includes read/write and close, fortunately.
    * We do all of this directly here instead of resetting
@@ -90,11 +85,26 @@ static void uv__signal_global_reinit(void) {
    * uv__signal_global_once_init is only called from uv_loop_init
    * and this needs to function in existing loops.
    */
-  uv__close(uv__signal_lock_pipefd[0]);
-  uv__signal_lock_pipefd[0] = -1;
-  uv__close(uv__signal_lock_pipefd[1]);
-  uv__signal_lock_pipefd[1] = -1;
-  uv__signal_global_init();
+  if (uv__signal_lock_pipefd[0] != -1) {
+    uv__close(uv__signal_lock_pipefd[0]);
+    uv__signal_lock_pipefd[0] = -1;
+  }
+
+  if (uv__signal_lock_pipefd[1] != -1) {
+    uv__close(uv__signal_lock_pipefd[1]);
+    uv__signal_lock_pipefd[1] = -1;
+  }
+}
+
+
+static void uv__signal_global_reinit(void) {
+  uv__signal_global_fini();
+
+  if (uv__make_pipe(uv__signal_lock_pipefd, 0))
+    abort();
+
+  if (uv__signal_unlock())
+    abort();
 }
 
 
@@ -103,7 +113,6 @@ void uv__signal_global_once_init(void) {
 }
 
 
-
 static int uv__signal_lock(void) {
   int r;
   char data;
@@ -387,7 +396,7 @@ static int uv__signal_start(uv_signal_t* handle,
    */
   first_handle = uv__signal_first_handle(signum);
   if (first_handle == NULL ||
-      (!oneshot && (first_handle->flags & UV__SIGNAL_ONE_SHOT))) {
+      (!oneshot && (first_handle->flags & UV_SIGNAL_ONE_SHOT))) {
     err = uv__signal_register_handler(signum, oneshot);
     if (err) {
       /* Registering the signal handler failed. Must be an invalid signal. */
@@ -398,7 +407,7 @@ static int uv__signal_start(uv_signal_t* handle,
 
   handle->signum = signum;
   if (oneshot)
-    handle->flags |= UV__SIGNAL_ONE_SHOT;
+    handle->flags |= UV_SIGNAL_ONE_SHOT;
 
   RB_INSERT(uv__signal_tree_s, &uv__signal_tree, handle);
 
@@ -455,20 +464,20 @@ static void uv__signal_event(uv_loop_t* loop,
       handle = msg->handle;
 
       if (msg->signum == handle->signum) {
-        assert(!(handle->flags & UV_CLOSING));
+        assert(!(handle->flags & UV_HANDLE_CLOSING));
         handle->signal_cb(handle, handle->signum);
       }
 
       handle->dispatched_signals++;
 
-      if (handle->flags & UV__SIGNAL_ONE_SHOT)
+      if (handle->flags & UV_SIGNAL_ONE_SHOT)
         uv__signal_stop(handle);
 
       /* If uv_close was called while there were caught signals that were not
        * yet dispatched, the uv__finish_close was deferred. Make close pending
        * now if this has happened.
        */
-      if ((handle->flags & UV_CLOSING) &&
+      if ((handle->flags & UV_HANDLE_CLOSING) &&
           (handle->caught_signals == handle->dispatched_signals)) {
         uv__make_close_pending((uv_handle_t*) handle);
       }
@@ -496,11 +505,11 @@ static int uv__signal_compare(uv_signal_t* w1, uv_signal_t* w2) {
   if (w1->signum < w2->signum) return -1;
   if (w1->signum > w2->signum) return 1;
 
-  /* Handlers without UV__SIGNAL_ONE_SHOT set will come first, so if the first
+  /* Handlers without UV_SIGNAL_ONE_SHOT set will come first, so if the first
    * handler returned is a one-shot handler, the rest will be too.
    */
-  f1 = w1->flags & UV__SIGNAL_ONE_SHOT;
-  f2 = w2->flags & UV__SIGNAL_ONE_SHOT;
+  f1 = w1->flags & UV_SIGNAL_ONE_SHOT;
+  f2 = w2->flags & UV_SIGNAL_ONE_SHOT;
   if (f1 < f2) return -1;
   if (f1 > f2) return 1;
 
@@ -549,8 +558,8 @@ static void uv__signal_stop(uv_signal_t* handle) {
   if (first_handle == NULL) {
     uv__signal_unregister_handler(handle->signum);
   } else {
-    rem_oneshot = handle->flags & UV__SIGNAL_ONE_SHOT;
-    first_oneshot = first_handle->flags & UV__SIGNAL_ONE_SHOT;
+    rem_oneshot = handle->flags & UV_SIGNAL_ONE_SHOT;
+    first_oneshot = first_handle->flags & UV_SIGNAL_ONE_SHOT;
     if (first_oneshot && !rem_oneshot) {
       ret = uv__signal_register_handler(handle->signum, 1);
       assert(ret == 0);
diff --git a/deps/libuv/src/unix/stream.c b/deps/libuv/src/unix/stream.c
index 5ec6bf4de..4d62a23f1 100644
--- a/deps/libuv/src/unix/stream.c
+++ b/deps/libuv/src/unix/stream.c
@@ -220,7 +220,7 @@ static void uv__stream_osx_select(void* arg) {
       uv_sem_wait(&s->async_sem);
 
       /* Should be processed at this stage */
-      assert((s->events == 0) || (stream->flags & UV_CLOSING));
+      assert((s->events == 0) || (stream->flags & UV_HANDLE_CLOSING));
     }
   }
 }
@@ -248,7 +248,7 @@ static void uv__stream_osx_select_cb(uv_async_t* handle) {
   if ((events & POLLOUT) && uv__io_active(&stream->io_watcher, POLLOUT))
     uv__stream_io(stream->loop, &stream->io_watcher, POLLOUT);
 
-  if (stream->flags & UV_CLOSING)
+  if (stream->flags & UV_HANDLE_CLOSING)
     return;
 
   /* NOTE: It is important to do it here, otherwise `select()` might be called
@@ -342,7 +342,7 @@ int uv__stream_try_select(uv_stream_t* stream, int* fd) {
   if (err)
     goto failed_async_init;
 
-  s->async.flags |= UV__HANDLE_INTERNAL;
+  s->async.flags |= UV_HANDLE_INTERNAL;
   uv__handle_unref(&s->async);
 
   err = uv_sem_init(&s->close_sem, 0);
@@ -407,12 +407,14 @@ int uv__stream_open(uv_stream_t* stream, int fd, int flags) {
   stream->flags |= flags;
 
   if (stream->type == UV_TCP) {
-    if ((stream->flags & UV_TCP_NODELAY) && uv__tcp_nodelay(fd, 1))
+    if ((stream->flags & UV_HANDLE_TCP_NODELAY) && uv__tcp_nodelay(fd, 1))
       return UV__ERR(errno);
 
     /* TODO Use delay the user passed in. */
-    if ((stream->flags & UV_TCP_KEEPALIVE) && uv__tcp_keepalive(fd, 1, 60))
+    if ((stream->flags & UV_HANDLE_TCP_KEEPALIVE) &&
+        uv__tcp_keepalive(fd, 1, 60)) {
       return UV__ERR(errno);
+    }
   }
 
 #if defined(__APPLE__)
@@ -447,7 +449,7 @@ void uv__stream_flush_write_queue(uv_stream_t* stream, int error) {
 
 void uv__stream_destroy(uv_stream_t* stream) {
   assert(!uv__io_active(&stream->io_watcher, POLLIN | POLLOUT));
-  assert(stream->flags & UV_CLOSED);
+  assert(stream->flags & UV_HANDLE_CLOSED);
 
   if (stream->connect_req) {
     uv__req_unregister(stream->loop, stream->connect_req);
@@ -522,7 +524,7 @@ void uv__server_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
   stream = container_of(w, uv_stream_t, io_watcher);
   assert(events & POLLIN);
   assert(stream->accepted_fd == -1);
-  assert(!(stream->flags & UV_CLOSING));
+  assert(!(stream->flags & UV_HANDLE_CLOSING));
 
   uv__io_start(stream->loop, &stream->io_watcher, POLLIN);
 
@@ -565,7 +567,8 @@ void uv__server_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
       return;
     }
 
-    if (stream->type == UV_TCP && (stream->flags & UV_TCP_SINGLE_ACCEPT)) {
+    if (stream->type == UV_TCP &&
+        (stream->flags & UV_HANDLE_TCP_SINGLE_ACCEPT)) {
       /* Give other processes a chance to accept connections. */
       struct timespec timeout = { 0, 1 };
       nanosleep(&timeout, NULL);
@@ -590,7 +593,7 @@ int uv_accept(uv_stream_t* server, uv_stream_t* client) {
     case UV_TCP:
       err = uv__stream_open(client,
                             server->accepted_fd,
-                            UV_STREAM_READABLE | UV_STREAM_WRITABLE);
+                            UV_HANDLE_READABLE | UV_HANDLE_WRITABLE);
       if (err) {
         /* TODO handle error */
         uv__close(server->accepted_fd);
@@ -674,14 +677,14 @@ static void uv__drain(uv_stream_t* stream) {
   uv__stream_osx_interrupt_select(stream);
 
   /* Shutdown? */
-  if ((stream->flags & UV_STREAM_SHUTTING) &&
-      !(stream->flags & UV_CLOSING) &&
-      !(stream->flags & UV_STREAM_SHUT)) {
+  if ((stream->flags & UV_HANDLE_SHUTTING) &&
+      !(stream->flags & UV_HANDLE_CLOSING) &&
+      !(stream->flags & UV_HANDLE_SHUT)) {
     assert(stream->shutdown_req);
 
     req = stream->shutdown_req;
     stream->shutdown_req = NULL;
-    stream->flags &= ~UV_STREAM_SHUTTING;
+    stream->flags &= ~UV_HANDLE_SHUTTING;
     uv__req_unregister(stream->loop, req);
 
     err = 0;
@@ -689,7 +692,7 @@ static void uv__drain(uv_stream_t* stream) {
       err = UV__ERR(errno);
 
     if (err == 0)
-      stream->flags |= UV_STREAM_SHUT;
+      stream->flags |= UV_HANDLE_SHUT;
 
     if (req->cb != NULL)
       req->cb(req, err);
@@ -868,7 +871,7 @@ static void uv__write(uv_stream_t* stream) {
     if (!WRITE_RETRY_ON_ERROR(req->send_handle)) {
       err = UV__ERR(errno);
       goto error;
-    } else if (stream->flags & UV_STREAM_BLOCKING) {
+    } else if (stream->flags & UV_HANDLE_BLOCKING_WRITES) {
       /* If this is a blocking stream, try again. */
       goto start;
     }
@@ -888,7 +891,7 @@ static void uv__write(uv_stream_t* stream) {
         n = 0;
 
         /* There is more to write. */
-        if (stream->flags & UV_STREAM_BLOCKING) {
+        if (stream->flags & UV_HANDLE_BLOCKING_WRITES) {
           /*
            * If we're blocking then we should not be enabling the write
            * watcher - instead we need to try again.
@@ -924,7 +927,7 @@ static void uv__write(uv_stream_t* stream) {
   assert(n == 0 || n == -1);
 
   /* Only non-blocking streams should use the write_watcher. */
-  assert(!(stream->flags & UV_STREAM_BLOCKING));
+  assert(!(stream->flags & UV_HANDLE_BLOCKING_WRITES));
 
   /* We're not done. */
   uv__io_start(stream->loop, &stream->io_watcher, POLLOUT);
@@ -1015,13 +1018,13 @@ uv_handle_type uv__handle_type(int fd) {
 
 
 static void uv__stream_eof(uv_stream_t* stream, const uv_buf_t* buf) {
-  stream->flags |= UV_STREAM_READ_EOF;
+  stream->flags |= UV_HANDLE_READ_EOF;
   uv__io_stop(stream->loop, &stream->io_watcher, POLLIN);
   if (!uv__io_active(&stream->io_watcher, POLLOUT))
     uv__handle_stop(stream);
   uv__stream_osx_interrupt_select(stream);
   stream->read_cb(stream, UV_EOF, buf);
-  stream->flags &= ~UV_STREAM_READING;
+  stream->flags &= ~UV_HANDLE_READING;
 }
 
 
@@ -1121,6 +1124,7 @@ static int uv__stream_recv_cmsg(uv_stream_t* stream, struct msghdr* msg) {
 #ifdef __clang__
 # pragma clang diagnostic push
 # pragma clang diagnostic ignored "-Wgnu-folding-constant"
+# pragma clang diagnostic ignored "-Wvla-extension"
 #endif
 
 static void uv__read(uv_stream_t* stream) {
@@ -1132,7 +1136,7 @@ static void uv__read(uv_stream_t* stream) {
   int err;
   int is_ipc;
 
-  stream->flags &= ~UV_STREAM_READ_PARTIAL;
+  stream->flags &= ~UV_HANDLE_READ_PARTIAL;
 
   /* Prevent loop starvation when the data comes in as fast as (or faster than)
    * we can read it. XXX Need to rearm fd if we switch to edge-triggered I/O.
@@ -1141,11 +1145,11 @@ static void uv__read(uv_stream_t* stream) {
 
   is_ipc = stream->type == UV_NAMED_PIPE && ((uv_pipe_t*) stream)->ipc;
 
-  /* XXX: Maybe instead of having UV_STREAM_READING we just test if
+  /* XXX: Maybe instead of having UV_HANDLE_READING we just test if
    * tcp->read_cb is NULL or not?
    */
   while (stream->read_cb
-      && (stream->flags & UV_STREAM_READING)
+      && (stream->flags & UV_HANDLE_READING)
       && (count-- > 0)) {
     assert(stream->alloc_cb != NULL);
 
@@ -1186,7 +1190,7 @@ static void uv__read(uv_stream_t* stream) {
       /* Error */
       if (errno == EAGAIN || errno == EWOULDBLOCK) {
         /* Wait for the next one. */
-        if (stream->flags & UV_STREAM_READING) {
+        if (stream->flags & UV_HANDLE_READING) {
           uv__io_start(stream->loop, &stream->io_watcher, POLLIN);
           uv__stream_osx_interrupt_select(stream);
         }
@@ -1199,8 +1203,8 @@ static void uv__read(uv_stream_t* stream) {
       } else {
         /* Error. User should call uv_close(). */
         stream->read_cb(stream, UV__ERR(errno), &buf);
-        if (stream->flags & UV_STREAM_READING) {
-          stream->flags &= ~UV_STREAM_READING;
+        if (stream->flags & UV_HANDLE_READING) {
+          stream->flags &= ~UV_HANDLE_READING;
           uv__io_stop(stream->loop, &stream->io_watcher, POLLIN);
           if (!uv__io_active(&stream->io_watcher, POLLOUT))
             uv__handle_stop(stream);
@@ -1250,7 +1254,7 @@ static void uv__read(uv_stream_t* stream) {
 
       /* Return if we didn't fill the buffer, there is no more data to read. */
       if (nread < buflen) {
-        stream->flags |= UV_STREAM_READ_PARTIAL;
+        stream->flags |= UV_HANDLE_READ_PARTIAL;
         return;
       }
     }
@@ -1271,9 +1275,9 @@ int uv_shutdown(uv_shutdown_t* req, uv_stream_t* stream, uv_shutdown_cb cb) {
          stream->type == UV_TTY ||
          stream->type == UV_NAMED_PIPE);
 
-  if (!(stream->flags & UV_STREAM_WRITABLE) ||
-      stream->flags & UV_STREAM_SHUT ||
-      stream->flags & UV_STREAM_SHUTTING ||
+  if (!(stream->flags & UV_HANDLE_WRITABLE) ||
+      stream->flags & UV_HANDLE_SHUT ||
+      stream->flags & UV_HANDLE_SHUTTING ||
       uv__is_closing(stream)) {
     return UV_ENOTCONN;
   }
@@ -1285,7 +1289,7 @@ int uv_shutdown(uv_shutdown_t* req, uv_stream_t* stream, uv_shutdown_cb cb) {
   req->handle = stream;
   req->cb = cb;
   stream->shutdown_req = req;
-  stream->flags |= UV_STREAM_SHUTTING;
+  stream->flags |= UV_HANDLE_SHUTTING;
 
   uv__io_start(stream->loop, &stream->io_watcher, POLLOUT);
   uv__stream_osx_interrupt_select(stream);
@@ -1302,7 +1306,7 @@ static void uv__stream_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
   assert(stream->type == UV_TCP ||
          stream->type == UV_NAMED_PIPE ||
          stream->type == UV_TTY);
-  assert(!(stream->flags & UV_CLOSING));
+  assert(!(stream->flags & UV_HANDLE_CLOSING));
 
   if (stream->connect_req) {
     uv__stream_connect(stream);
@@ -1311,7 +1315,7 @@ static void uv__stream_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
 
   assert(uv__stream_fd(stream) >= 0);
 
-  /* Ignore POLLHUP here. Even it it's set, there may still be data to read. */
+  /* Ignore POLLHUP here. Even if it's set, there may still be data to read. */
   if (events & (POLLIN | POLLERR | POLLHUP))
     uv__read(stream);
 
@@ -1325,9 +1329,9 @@ static void uv__stream_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
    * report the EOF yet because there is still data to read.
    */
   if ((events & POLLHUP) &&
-      (stream->flags & UV_STREAM_READING) &&
-      (stream->flags & UV_STREAM_READ_PARTIAL) &&
-      !(stream->flags & UV_STREAM_READ_EOF)) {
+      (stream->flags & UV_HANDLE_READING) &&
+      (stream->flags & UV_HANDLE_READ_PARTIAL) &&
+      !(stream->flags & UV_HANDLE_READ_EOF)) {
     uv_buf_t buf = { NULL, 0 };
     uv__stream_eof(stream, &buf);
   }
@@ -1417,7 +1421,7 @@ int uv_write2(uv_write_t* req,
   if (uv__stream_fd(stream) < 0)
     return UV_EBADF;
 
-  if (!(stream->flags & UV_STREAM_WRITABLE))
+  if (!(stream->flags & UV_HANDLE_WRITABLE))
     return -EPIPE;
 
   if (send_handle) {
@@ -1487,7 +1491,7 @@ int uv_write2(uv_write_t* req,
      * if this assert fires then somehow the blocking stream isn't being
      * sufficiently flushed in uv__write.
      */
-    assert(!(stream->flags & UV_STREAM_BLOCKING));
+    assert(!(stream->flags & UV_HANDLE_BLOCKING_WRITES));
     uv__io_start(stream->loop, &stream->io_watcher, POLLOUT);
     uv__stream_osx_interrupt_select(stream);
   }
@@ -1568,16 +1572,16 @@ int uv_read_start(uv_stream_t* stream,
   assert(stream->type == UV_TCP || stream->type == UV_NAMED_PIPE ||
       stream->type == UV_TTY);
 
-  if (stream->flags & UV_CLOSING)
+  if (stream->flags & UV_HANDLE_CLOSING)
     return UV_EINVAL;
 
-  if (!(stream->flags & UV_STREAM_READABLE))
+  if (!(stream->flags & UV_HANDLE_READABLE))
     return -ENOTCONN;
 
-  /* The UV_STREAM_READING flag is irrelevant of the state of the tcp - it just
+  /* The UV_HANDLE_READING flag is irrelevant of the state of the tcp - it just
    * expresses the desired state of the user.
    */
-  stream->flags |= UV_STREAM_READING;
+  stream->flags |= UV_HANDLE_READING;
 
   /* TODO: try to do the read inline? */
   /* TODO: keep track of tcp state. If we've gotten a EOF then we should
@@ -1598,10 +1602,10 @@ int uv_read_start(uv_stream_t* stream,
 
 
 int uv_read_stop(uv_stream_t* stream) {
-  if (!(stream->flags & UV_STREAM_READING))
+  if (!(stream->flags & UV_HANDLE_READING))
     return 0;
 
-  stream->flags &= ~UV_STREAM_READING;
+  stream->flags &= ~UV_HANDLE_READING;
   uv__io_stop(stream->loop, &stream->io_watcher, POLLIN);
   if (!uv__io_active(&stream->io_watcher, POLLOUT))
     uv__handle_stop(stream);
@@ -1614,12 +1618,12 @@ int uv_read_stop(uv_stream_t* stream) {
 
 
 int uv_is_readable(const uv_stream_t* stream) {
-  return !!(stream->flags & UV_STREAM_READABLE);
+  return !!(stream->flags & UV_HANDLE_READABLE);
 }
 
 
 int uv_is_writable(const uv_stream_t* stream) {
-  return !!(stream->flags & UV_STREAM_WRITABLE);
+  return !!(stream->flags & UV_HANDLE_WRITABLE);
 }
 
 
diff --git a/deps/libuv/src/unix/tcp.c b/deps/libuv/src/unix/tcp.c
index 9a46793fd..2982851dc 100644
--- a/deps/libuv/src/unix/tcp.c
+++ b/deps/libuv/src/unix/tcp.c
@@ -216,7 +216,7 @@ int uv__tcp_connect(uv_connect_t* req,
 
   err = maybe_new_socket(handle,
                          addr->sa_family,
-                         UV_STREAM_READABLE | UV_STREAM_WRITABLE);
+                         UV_HANDLE_READABLE | UV_HANDLE_WRITABLE);
   if (err)
     return err;
 
@@ -263,13 +263,16 @@ int uv__tcp_connect(uv_connect_t* req,
 int uv_tcp_open(uv_tcp_t* handle, uv_os_sock_t sock) {
   int err;
 
+  if (uv__fd_exists(handle->loop, sock))
+    return UV_EEXIST;
+
   err = uv__nonblock(sock, 1);
   if (err)
     return err;
 
   return uv__stream_open((uv_stream_t*)handle,
                          sock,
-                         UV_STREAM_READABLE | UV_STREAM_WRITABLE);
+                         UV_HANDLE_READABLE | UV_HANDLE_WRITABLE);
 }
 
 
@@ -331,7 +334,7 @@ int uv_tcp_listen(uv_tcp_t* tcp, int backlog, uv_connection_cb cb) {
   }
 
   if (single_accept)
-    tcp->flags |= UV_TCP_SINGLE_ACCEPT;
+    tcp->flags |= UV_HANDLE_TCP_SINGLE_ACCEPT;
 
   flags = 0;
 #if defined(__MVS__)
@@ -398,9 +401,9 @@ int uv_tcp_nodelay(uv_tcp_t* handle, int on) {
   }
 
   if (on)
-    handle->flags |= UV_TCP_NODELAY;
+    handle->flags |= UV_HANDLE_TCP_NODELAY;
   else
-    handle->flags &= ~UV_TCP_NODELAY;
+    handle->flags &= ~UV_HANDLE_TCP_NODELAY;
 
   return 0;
 }
@@ -416,9 +419,9 @@ int uv_tcp_keepalive(uv_tcp_t* handle, int on, unsigned int delay) {
   }
 
   if (on)
-    handle->flags |= UV_TCP_KEEPALIVE;
+    handle->flags |= UV_HANDLE_TCP_KEEPALIVE;
   else
-    handle->flags &= ~UV_TCP_KEEPALIVE;
+    handle->flags &= ~UV_HANDLE_TCP_KEEPALIVE;
 
   /* TODO Store delay if uv__stream_fd(handle) == -1 but don't want to enlarge
    *      uv_tcp_t with an int that's almost never used...
@@ -430,9 +433,9 @@ int uv_tcp_keepalive(uv_tcp_t* handle, int on, unsigned int delay) {
 
 int uv_tcp_simultaneous_accepts(uv_tcp_t* handle, int enable) {
   if (enable)
-    handle->flags &= ~UV_TCP_SINGLE_ACCEPT;
+    handle->flags &= ~UV_HANDLE_TCP_SINGLE_ACCEPT;
   else
-    handle->flags |= UV_TCP_SINGLE_ACCEPT;
+    handle->flags |= UV_HANDLE_TCP_SINGLE_ACCEPT;
   return 0;
 }
 
diff --git a/deps/libuv/src/unix/thread.c b/deps/libuv/src/unix/thread.c
index ada2ffc88..303bc6ec8 100644
--- a/deps/libuv/src/unix/thread.c
+++ b/deps/libuv/src/unix/thread.c
@@ -423,87 +423,6 @@ int uv_sem_trywait(uv_sem_t* sem) {
   return UV_EINVAL;  /* Satisfy the compiler. */
 }
 
-#elif defined(__MVS__)
-
-int uv_sem_init(uv_sem_t* sem, unsigned int value) {
-  uv_sem_t semid;
-  int err;
-  union {
-    int val;
-    struct semid_ds* buf;
-    unsigned short* array;
-  } arg;
-
-
-  semid = semget(IPC_PRIVATE, 1, S_IRUSR | S_IWUSR);
-  if (semid == -1)
-    return UV__ERR(errno);
-
-  arg.val = value;
-  if (-1 == semctl(semid, 0, SETVAL, arg)) {
-    err = errno;
-    if (-1 == semctl(*sem, 0, IPC_RMID))
-      abort();
-    return UV__ERR(err);
-  }
-
-  *sem = semid;
-  return 0;
-}
-
-void uv_sem_destroy(uv_sem_t* sem) {
-  if (-1 == semctl(*sem, 0, IPC_RMID))
-    abort();
-}
-
-void uv_sem_post(uv_sem_t* sem) {
-  struct sembuf buf;
-
-  buf.sem_num = 0;
-  buf.sem_op = 1;
-  buf.sem_flg = 0;
-
-  if (-1 == semop(*sem, &buf, 1))
-    abort();
-}
-
-void uv_sem_wait(uv_sem_t* sem) {
-  struct sembuf buf;
-  int op_status;
-
-  buf.sem_num = 0;
-  buf.sem_op = -1;
-  buf.sem_flg = 0;
-
-  do
-    op_status = semop(*sem, &buf, 1);
-  while (op_status == -1 && errno == EINTR);
-
-  if (op_status)
-    abort();
-}
-
-int uv_sem_trywait(uv_sem_t* sem) {
-  struct sembuf buf;
-  int op_status;
-
-  buf.sem_num = 0;
-  buf.sem_op = -1;
-  buf.sem_flg = IPC_NOWAIT;
-
-  do
-    op_status = semop(*sem, &buf, 1);
-  while (op_status == -1 && errno == EINTR);
-
-  if (op_status) {
-    if (errno == EAGAIN)
-      return UV_EAGAIN;
-    abort();
-  }
-
-  return 0;
-}
-
 #else /* !(defined(__APPLE__) && defined(__MACH__)) */
 
 #ifdef __GLIBC__
@@ -517,18 +436,22 @@ int uv_sem_trywait(uv_sem_t* sem) {
  * a pointer to the actual struct we're using underneath. */
 
 static uv_once_t glibc_version_check_once = UV_ONCE_INIT;
-static int glibc_needs_custom_semaphore = 0;
+static int platform_needs_custom_semaphore = 0;
 
 static void glibc_version_check(void) {
   const char* version = gnu_get_libc_version();
-  glibc_needs_custom_semaphore =
+  platform_needs_custom_semaphore =
       version[0] == '2' && version[1] == '.' &&
       atoi(version + 2) < 21;
 }
 
-#else /* !defined(__GLIBC__) */
+#elif defined(__MVS__)
+
+#define platform_needs_custom_semaphore 1
 
-#define glibc_needs_custom_semaphore 0
+#else /* !defined(__GLIBC__) && !defined(__MVS__) */
+
+#define platform_needs_custom_semaphore 0
 
 #endif
 
@@ -538,8 +461,9 @@ typedef struct uv_semaphore_s {
   unsigned int value;
 } uv_semaphore_t;
 
-
+#if defined(__GLIBC__) || platform_needs_custom_semaphore
 STATIC_ASSERT(sizeof(uv_sem_t) >= sizeof(uv_semaphore_t*));
+#endif
 
 static int uv__custom_sem_init(uv_sem_t* sem_, unsigned int value) {
   int err;
@@ -670,7 +594,7 @@ int uv_sem_init(uv_sem_t* sem, unsigned int value) {
   uv_once(&glibc_version_check_once, glibc_version_check);
 #endif
 
-  if (glibc_needs_custom_semaphore)
+  if (platform_needs_custom_semaphore)
     return uv__custom_sem_init(sem, value);
   else
     return uv__sem_init(sem, value);
@@ -678,7 +602,7 @@ int uv_sem_init(uv_sem_t* sem, unsigned int value) {
 
 
 void uv_sem_destroy(uv_sem_t* sem) {
-  if (glibc_needs_custom_semaphore)
+  if (platform_needs_custom_semaphore)
     uv__custom_sem_destroy(sem);
   else
     uv__sem_destroy(sem);
@@ -686,7 +610,7 @@ void uv_sem_destroy(uv_sem_t* sem) {
 
 
 void uv_sem_post(uv_sem_t* sem) {
-  if (glibc_needs_custom_semaphore)
+  if (platform_needs_custom_semaphore)
     uv__custom_sem_post(sem);
   else
     uv__sem_post(sem);
@@ -694,7 +618,7 @@ void uv_sem_post(uv_sem_t* sem) {
 
 
 void uv_sem_wait(uv_sem_t* sem) {
-  if (glibc_needs_custom_semaphore)
+  if (platform_needs_custom_semaphore)
     uv__custom_sem_wait(sem);
   else
     uv__sem_wait(sem);
@@ -702,7 +626,7 @@ void uv_sem_wait(uv_sem_t* sem) {
 
 
 int uv_sem_trywait(uv_sem_t* sem) {
-  if (glibc_needs_custom_semaphore)
+  if (platform_needs_custom_semaphore)
     return uv__custom_sem_trywait(sem);
   else
     return uv__sem_trywait(sem);
diff --git a/deps/libuv/src/unix/tty.c b/deps/libuv/src/unix/tty.c
index f22b3b80d..1b92b5c91 100644
--- a/deps/libuv/src/unix/tty.c
+++ b/deps/libuv/src/unix/tty.c
@@ -135,7 +135,7 @@ int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
     if (r < 0) {
       /* fallback to using blocking writes */
       if (!readable)
-        flags |= UV_STREAM_BLOCKING;
+        flags |= UV_HANDLE_BLOCKING_WRITES;
       goto skip;
     }
 
@@ -177,7 +177,7 @@ int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
    * the handle queue, since it was added by uv__handle_init in uv_stream_init.
    */
 
-  if (!(flags & UV_STREAM_BLOCKING))
+  if (!(flags & UV_HANDLE_BLOCKING_WRITES))
     uv__nonblock(fd, 1);
 
 #if defined(__APPLE__)
@@ -195,9 +195,9 @@ int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
 #endif
 
   if (readable)
-    flags |= UV_STREAM_READABLE;
+    flags |= UV_HANDLE_READABLE;
   else
-    flags |= UV_STREAM_WRITABLE;
+    flags |= UV_HANDLE_WRITABLE;
 
   uv__stream_open((uv_stream_t*) tty, fd, flags);
   tty->mode = UV_TTY_MODE_NORMAL;
diff --git a/deps/libuv/src/unix/udp.c b/deps/libuv/src/unix/udp.c
index 74d613b68..e6668a012 100644
--- a/deps/libuv/src/unix/udp.c
+++ b/deps/libuv/src/unix/udp.c
@@ -92,8 +92,8 @@ static void uv__udp_run_completed(uv_udp_t* handle) {
   uv_udp_send_t* req;
   QUEUE* q;
 
-  assert(!(handle->flags & UV_UDP_PROCESSING));
-  handle->flags |= UV_UDP_PROCESSING;
+  assert(!(handle->flags & UV_HANDLE_UDP_PROCESSING));
+  handle->flags |= UV_HANDLE_UDP_PROCESSING;
 
   while (!QUEUE_EMPTY(&handle->write_completed_queue)) {
     q = QUEUE_HEAD(&handle->write_completed_queue);
@@ -128,7 +128,7 @@ static void uv__udp_run_completed(uv_udp_t* handle) {
       uv__handle_stop(handle);
   }
 
-  handle->flags &= ~UV_UDP_PROCESSING;
+  handle->flags &= ~UV_HANDLE_UDP_PROCESSING;
 }
 
 
@@ -427,7 +427,7 @@ int uv__udp_send(uv_udp_send_t* req,
   QUEUE_INSERT_TAIL(&handle->write_queue, &req->queue);
   uv__handle_start(handle);
 
-  if (empty_queue && !(handle->flags & UV_UDP_PROCESSING)) {
+  if (empty_queue && !(handle->flags & UV_HANDLE_UDP_PROCESSING)) {
     uv__udp_sendmsg(handle);
 
     /* `uv__udp_sendmsg` may not be able to do non-blocking write straight
@@ -624,6 +624,9 @@ int uv_udp_open(uv_udp_t* handle, uv_os_sock_t sock) {
   if (handle->io_watcher.fd != -1)
     return UV_EBUSY;
 
+  if (uv__fd_exists(handle->loop, sock))
+    return UV_EEXIST;
+
   err = uv__nonblock(sock, 1);
   if (err)
     return err;
diff --git a/deps/libuv/src/uv-common.c b/deps/libuv/src/uv-common.c
index 713458956..f0aec4526 100644
--- a/deps/libuv/src/uv-common.c
+++ b/deps/libuv/src/uv-common.c
@@ -155,6 +155,18 @@ static const char* uv__unknown_err_code(int err) {
   return copy != NULL ? copy : "Unknown system error";
 }
 
+#define UV_ERR_NAME_GEN_R(name, _) \
+case UV_## name: \
+  snprintf(buf, buflen, "%s", #name); break;
+char* uv_err_name_r(int err, char* buf, size_t buflen) {
+  switch (err) {
+    UV_ERRNO_MAP(UV_ERR_NAME_GEN_R)
+    default: snprintf(buf, buflen, "Unknown system error %d", err);
+  }
+  return buf;
+}
+#undef UV_ERR_NAME_GEN_R
+
 
 #define UV_ERR_NAME_GEN(name, _) case UV_ ## name: return #name;
 const char* uv_err_name(int err) {
@@ -166,6 +178,19 @@ const char* uv_err_name(int err) {
 #undef UV_ERR_NAME_GEN
 
 
+#define UV_STRERROR_GEN_R(name, msg) \
+case UV_ ## name: \
+  snprintf(buf, buflen, "%s", msg); break;
+char* uv_strerror_r(int err, char* buf, size_t buflen) {
+  switch (err) {
+    UV_ERRNO_MAP(UV_STRERROR_GEN_R)
+    default: snprintf(buf, buflen, "Unknown system error %d", err);
+  }
+  return buf;
+}
+#undef UV_STRERROR_GEN_R
+
+
 #define UV_STRERROR_GEN(name, msg) case UV_ ## name: return msg;
 const char* uv_strerror(int err) {
   switch (err) {
@@ -357,7 +382,7 @@ void uv_walk(uv_loop_t* loop, uv_walk_cb walk_cb, void* arg) {
     QUEUE_REMOVE(q);
     QUEUE_INSERT_TAIL(&loop->handle_queue, q);
 
-    if (h->flags & UV__HANDLE_INTERNAL) continue;
+    if (h->flags & UV_HANDLE_INTERNAL) continue;
     walk_cb(h, arg);
   }
 }
@@ -386,9 +411,9 @@ static void uv__print_handles(uv_loop_t* loop, int only_active, FILE* stream) {
 
     fprintf(stream,
             "[%c%c%c] %-8s %p\n",
-            "R-"[!(h->flags & UV__HANDLE_REF)],
-            "A-"[!(h->flags & UV__HANDLE_ACTIVE)],
-            "I-"[!(h->flags & UV__HANDLE_INTERNAL)],
+            "R-"[!(h->flags & UV_HANDLE_REF)],
+            "A-"[!(h->flags & UV_HANDLE_ACTIVE)],
+            "I-"[!(h->flags & UV_HANDLE_INTERNAL)],
             type,
             (void*)h);
   }
@@ -632,7 +657,7 @@ int uv_loop_close(uv_loop_t* loop) {
 
   QUEUE_FOREACH(q, &loop->handle_queue) {
     h = QUEUE_DATA(q, uv_handle_t, handle_queue);
-    if (!(h->flags & UV__HANDLE_INTERNAL))
+    if (!(h->flags & UV_HANDLE_INTERNAL))
       return UV_EBUSY;
   }
 
diff --git a/deps/libuv/src/uv-common.h b/deps/libuv/src/uv-common.h
index c497d014f..3289950d0 100644
--- a/deps/libuv/src/uv-common.h
+++ b/deps/libuv/src/uv-common.h
@@ -32,13 +32,13 @@
 #include <stddef.h>
 
 #if defined(_MSC_VER) && _MSC_VER < 1600
-# include "stdint-msvc2008.h"
+# include "uv/stdint-msvc2008.h"
 #else
 # include <stdint.h>
 #endif
 
 #include "uv.h"
-#include "tree.h"
+#include "uv/tree.h"
 #include "queue.h"
 
 #if EDOM > 0
@@ -59,22 +59,67 @@ extern int snprintf(char*, size_t, const char*, ...);
 #define STATIC_ASSERT(expr)                                                   \
   void uv__static_assert(int static_assert_failed[1 - 2 * !(expr)])
 
-#ifndef _WIN32
+/* Handle flags. Some flags are specific to Windows or UNIX. */
 enum {
-  UV__SIGNAL_ONE_SHOT = 0x80000,  /* On signal reception remove sighandler */
-  UV__HANDLE_INTERNAL = 0x8000,
-  UV__HANDLE_ACTIVE   = 0x4000,
-  UV__HANDLE_REF      = 0x2000,
-  UV__HANDLE_CLOSING  = 0 /* no-op on unix */
+  /* Used by all handles. */
+  UV_HANDLE_CLOSING                     = 0x00000001,
+  UV_HANDLE_CLOSED                      = 0x00000002,
+  UV_HANDLE_ACTIVE                      = 0x00000004,
+  UV_HANDLE_REF                         = 0x00000008,
+  UV_HANDLE_INTERNAL                    = 0x00000010,
+  UV_HANDLE_ENDGAME_QUEUED              = 0x00000020,
+
+  /* Used by streams. */
+  UV_HANDLE_LISTENING                   = 0x00000040,
+  UV_HANDLE_CONNECTION                  = 0x00000080,
+  UV_HANDLE_SHUTTING                    = 0x00000100,
+  UV_HANDLE_SHUT                        = 0x00000200,
+  UV_HANDLE_READ_PARTIAL                = 0x00000400,
+  UV_HANDLE_READ_EOF                    = 0x00000800,
+
+  /* Used by streams and UDP handles. */
+  UV_HANDLE_READING                     = 0x00001000,
+  UV_HANDLE_BOUND                       = 0x00002000,
+  UV_HANDLE_READABLE                    = 0x00004000,
+  UV_HANDLE_WRITABLE                    = 0x00008000,
+  UV_HANDLE_READ_PENDING                = 0x00010000,
+  UV_HANDLE_SYNC_BYPASS_IOCP            = 0x00020000,
+  UV_HANDLE_ZERO_READ                   = 0x00040000,
+  UV_HANDLE_EMULATE_IOCP                = 0x00080000,
+  UV_HANDLE_BLOCKING_WRITES             = 0x00100000,
+  UV_HANDLE_CANCELLATION_PENDING        = 0x00200000,
+
+  /* Used by uv_tcp_t and uv_udp_t handles */
+  UV_HANDLE_IPV6                        = 0x00400000,
+
+  /* Only used by uv_tcp_t handles. */
+  UV_HANDLE_TCP_NODELAY                 = 0x01000000,
+  UV_HANDLE_TCP_KEEPALIVE               = 0x02000000,
+  UV_HANDLE_TCP_SINGLE_ACCEPT           = 0x04000000,
+  UV_HANDLE_TCP_ACCEPT_STATE_CHANGING   = 0x08000000,
+  UV_HANDLE_TCP_SOCKET_CLOSED           = 0x10000000,
+  UV_HANDLE_SHARED_TCP_SOCKET           = 0x20000000,
+
+  /* Only used by uv_udp_t handles. */
+  UV_HANDLE_UDP_PROCESSING              = 0x01000000,
+
+  /* Only used by uv_pipe_t handles. */
+  UV_HANDLE_NON_OVERLAPPED_PIPE         = 0x01000000,
+  UV_HANDLE_PIPESERVER                  = 0x02000000,
+
+  /* Only used by uv_tty_t handles. */
+  UV_HANDLE_TTY_READABLE                = 0x01000000,
+  UV_HANDLE_TTY_RAW                     = 0x02000000,
+  UV_HANDLE_TTY_SAVED_POSITION          = 0x04000000,
+  UV_HANDLE_TTY_SAVED_ATTRIBUTES        = 0x08000000,
+
+  /* Only used by uv_signal_t handles. */
+  UV_SIGNAL_ONE_SHOT_DISPATCHED         = 0x01000000,
+  UV_SIGNAL_ONE_SHOT                    = 0x02000000,
+
+  /* Only used by uv_poll_t handles. */
+  UV_HANDLE_POLL_SLOW                   = 0x01000000
 };
-#else
-# define UV__SIGNAL_ONE_SHOT_DISPATCHED   0x200
-# define UV__SIGNAL_ONE_SHOT              0x100
-# define UV__HANDLE_INTERNAL              0x80
-# define UV__HANDLE_ACTIVE                0x40
-# define UV__HANDLE_REF                   0x20
-# define UV__HANDLE_CLOSING               0x01
-#endif
 
 int uv__loop_configure(uv_loop_t* loop, uv_loop_option option, va_list ap);
 
@@ -132,6 +177,10 @@ int uv__socket_sockopt(uv_handle_t* handle, int optname, int* value);
 
 void uv__fs_scandir_cleanup(uv_fs_t* req);
 
+int uv__next_timeout(const uv_loop_t* loop);
+void uv__run_timers(uv_loop_t* loop);
+void uv__timer_close(uv_timer_t* handle);
+
 #define uv__has_active_reqs(loop)                                             \
   ((loop)->active_reqs.count > 0)
 
@@ -164,49 +213,47 @@ void uv__fs_scandir_cleanup(uv_fs_t* req);
   while (0)
 
 #define uv__is_active(h)                                                      \
-  (((h)->flags & UV__HANDLE_ACTIVE) != 0)
+  (((h)->flags & UV_HANDLE_ACTIVE) != 0)
 
 #define uv__is_closing(h)                                                     \
-  (((h)->flags & (UV_CLOSING |  UV_CLOSED)) != 0)
+  (((h)->flags & (UV_HANDLE_CLOSING | UV_HANDLE_CLOSED)) != 0)
 
 #define uv__handle_start(h)                                                   \
   do {                                                                        \
-    assert(((h)->flags & UV__HANDLE_CLOSING) == 0);                           \
-    if (((h)->flags & UV__HANDLE_ACTIVE) != 0) break;                         \
-    (h)->flags |= UV__HANDLE_ACTIVE;                                          \
-    if (((h)->flags & UV__HANDLE_REF) != 0) uv__active_handle_add(h);         \
+    if (((h)->flags & UV_HANDLE_ACTIVE) != 0) break;                          \
+    (h)->flags |= UV_HANDLE_ACTIVE;                                           \
+    if (((h)->flags & UV_HANDLE_REF) != 0) uv__active_handle_add(h);          \
   }                                                                           \
   while (0)
 
 #define uv__handle_stop(h)                                                    \
   do {                                                                        \
-    assert(((h)->flags & UV__HANDLE_CLOSING) == 0);                           \
-    if (((h)->flags & UV__HANDLE_ACTIVE) == 0) break;                         \
-    (h)->flags &= ~UV__HANDLE_ACTIVE;                                         \
-    if (((h)->flags & UV__HANDLE_REF) != 0) uv__active_handle_rm(h);          \
+    if (((h)->flags & UV_HANDLE_ACTIVE) == 0) break;                          \
+    (h)->flags &= ~UV_HANDLE_ACTIVE;                                          \
+    if (((h)->flags & UV_HANDLE_REF) != 0) uv__active_handle_rm(h);           \
   }                                                                           \
   while (0)
 
 #define uv__handle_ref(h)                                                     \
   do {                                                                        \
-    if (((h)->flags & UV__HANDLE_REF) != 0) break;                            \
-    (h)->flags |= UV__HANDLE_REF;                                             \
-    if (((h)->flags & UV__HANDLE_CLOSING) != 0) break;                        \
-    if (((h)->flags & UV__HANDLE_ACTIVE) != 0) uv__active_handle_add(h);      \
+    if (((h)->flags & UV_HANDLE_REF) != 0) break;                             \
+    (h)->flags |= UV_HANDLE_REF;                                              \
+    if (((h)->flags & UV_HANDLE_CLOSING) != 0) break;                         \
+    if (((h)->flags & UV_HANDLE_ACTIVE) != 0) uv__active_handle_add(h);       \
   }                                                                           \
   while (0)
 
 #define uv__handle_unref(h)                                                   \
   do {                                                                        \
-    if (((h)->flags & UV__HANDLE_REF) == 0) break;                            \
-    (h)->flags &= ~UV__HANDLE_REF;                                            \
-    if (((h)->flags & UV__HANDLE_CLOSING) != 0) break;                        \
-    if (((h)->flags & UV__HANDLE_ACTIVE) != 0) uv__active_handle_rm(h);       \
+    if (((h)->flags & UV_HANDLE_REF) == 0) break;                             \
+    (h)->flags &= ~UV_HANDLE_REF;                                             \
+    if (((h)->flags & UV_HANDLE_CLOSING) != 0) break;                         \
+    if (((h)->flags & UV_HANDLE_ACTIVE) != 0) uv__active_handle_rm(h);        \
   }                                                                           \
   while (0)
 
 #define uv__has_ref(h)                                                        \
-  (((h)->flags & UV__HANDLE_REF) != 0)
+  (((h)->flags & UV_HANDLE_REF) != 0)
 
 #if defined(_WIN32)
 # define uv__handle_platform_init(h) ((h)->u.fd = -1)
@@ -218,7 +265,7 @@ void uv__fs_scandir_cleanup(uv_fs_t* req);
   do {                                                                        \
     (h)->loop = (loop_);                                                      \
     (h)->type = (type_);                                                      \
-    (h)->flags = UV__HANDLE_REF;  /* Ref the loop when active. */             \
+    (h)->flags = UV_HANDLE_REF;  /* Ref the loop when active. */              \
     QUEUE_INSERT_TAIL(&(loop_)->handle_queue, &(h)->handle_queue);            \
     uv__handle_platform_init(h);                                              \
   }                                                                           \
diff --git a/deps/libuv/src/win/async.c b/deps/libuv/src/win/async.c
index 0b636ed1e..d787f6604 100644
--- a/deps/libuv/src/win/async.c
+++ b/deps/libuv/src/win/async.c
@@ -29,7 +29,7 @@
 
 
 void uv_async_endgame(uv_loop_t* loop, uv_async_t* handle) {
-  if (handle->flags & UV__HANDLE_CLOSING &&
+  if (handle->flags & UV_HANDLE_CLOSING &&
       !handle->async_sent) {
     assert(!(handle->flags & UV_HANDLE_CLOSED));
     uv__handle_close(handle);
@@ -71,9 +71,9 @@ int uv_async_send(uv_async_t* handle) {
     return -1;
   }
 
-  /* The user should make sure never to call uv_async_send to a closing */
-  /* or closed handle. */
-  assert(!(handle->flags & UV__HANDLE_CLOSING));
+  /* The user should make sure never to call uv_async_send to a closing or
+   * closed handle. */
+  assert(!(handle->flags & UV_HANDLE_CLOSING));
 
   if (!uv__atomic_exchange_set(&handle->async_sent)) {
     POST_COMPLETION_FOR_REQ(loop, &handle->async_req);
@@ -90,7 +90,7 @@ void uv_process_async_wakeup_req(uv_loop_t* loop, uv_async_t* handle,
 
   handle->async_sent = 0;
 
-  if (handle->flags & UV__HANDLE_CLOSING) {
+  if (handle->flags & UV_HANDLE_CLOSING) {
     uv_want_endgame(loop, (uv_handle_t*)handle);
   } else if (handle->async_cb != NULL) {
     handle->async_cb(handle);
diff --git a/deps/libuv/src/win/atomicops-inl.h b/deps/libuv/src/win/atomicops-inl.h
index 6d8126f69..52713cf30 100644
--- a/deps/libuv/src/win/atomicops-inl.h
+++ b/deps/libuv/src/win/atomicops-inl.h
@@ -29,10 +29,10 @@
 /* Atomic set operation on char */
 #ifdef _MSC_VER /* MSVC */
 
-/* _InterlockedOr8 is supported by MSVC on x32 and x64. It is  slightly less */
-/* efficient than InterlockedExchange, but InterlockedExchange8 does not */
-/* exist, and interlocked operations on larger targets might require the */
-/* target to be aligned. */
+/* _InterlockedOr8 is supported by MSVC on x32 and x64. It is slightly less
+ * efficient than InterlockedExchange, but InterlockedExchange8 does not exist,
+ * and interlocked operations on larger targets might require the target to be
+ * aligned. */
 #pragma intrinsic(_InterlockedOr8)
 
 static char INLINE uv__atomic_exchange_set(char volatile* target) {
diff --git a/deps/libuv/src/win/core.c b/deps/libuv/src/win/core.c
index 5fa9b6666..5a76c9003 100644
--- a/deps/libuv/src/win/core.c
+++ b/deps/libuv/src/win/core.c
@@ -33,6 +33,7 @@
 #include "internal.h"
 #include "queue.h"
 #include "handle-inl.h"
+#include "heap-inl.h"
 #include "req-inl.h"
 
 /* uv_once initialization guards */
@@ -221,6 +222,7 @@ static void uv_init(void) {
 
 
 int uv_loop_init(uv_loop_t* loop) {
+  struct heap* timer_heap;
   int err;
 
   /* Initialize libuv itself first */
@@ -246,7 +248,11 @@ int uv_loop_init(uv_loop_t* loop) {
 
   loop->endgame_handles = NULL;
 
-  RB_INIT(&loop->timers);
+  loop->timer_heap = timer_heap = uv__malloc(sizeof(*timer_heap));
+  if (timer_heap == NULL)
+    goto fail_timers_alloc;
+
+  heap_init(timer_heap);
 
   loop->check_handles = NULL;
   loop->prepare_handles = NULL;
@@ -273,7 +279,7 @@ int uv_loop_init(uv_loop_t* loop) {
     goto fail_async_init;
 
   uv__handle_unref(&loop->wq_async);
-  loop->wq_async.flags |= UV__HANDLE_INTERNAL;
+  loop->wq_async.flags |= UV_HANDLE_INTERNAL;
 
   err = uv__loops_add(loop);
   if (err)
@@ -285,6 +291,10 @@ int uv_loop_init(uv_loop_t* loop) {
   uv_mutex_destroy(&loop->wq_mutex);
 
 fail_mutex_init:
+  uv__free(timer_heap);
+  loop->timer_heap = NULL;
+
+fail_timers_alloc:
   CloseHandle(loop->iocp);
   loop->iocp = INVALID_HANDLE_VALUE;
 
@@ -292,6 +302,13 @@ int uv_loop_init(uv_loop_t* loop) {
 }
 
 
+void uv_update_time(uv_loop_t* loop) {
+  uint64_t new_time = uv__hrtime(1000);
+  assert(new_time >= loop->time);
+  loop->time = new_time;
+}
+
+
 void uv__once_init(void) {
   uv_once(&uv_init_guard_, uv_init);
 }
@@ -320,6 +337,9 @@ void uv__loop_close(uv_loop_t* loop) {
   uv_mutex_unlock(&loop->wq_mutex);
   uv_mutex_destroy(&loop->wq_mutex);
 
+  uv__free(loop->timer_heap);
+  loop->timer_heap = NULL;
+
   CloseHandle(loop->iocp);
 }
 
@@ -359,58 +379,7 @@ int uv_backend_timeout(const uv_loop_t* loop) {
 }
 
 
-static void uv_poll(uv_loop_t* loop, DWORD timeout) {
-  DWORD bytes;
-  ULONG_PTR key;
-  OVERLAPPED* overlapped;
-  uv_req_t* req;
-  int repeat;
-  uint64_t timeout_time;
-
-  timeout_time = loop->time + timeout;
-
-  for (repeat = 0; ; repeat++) {
-    GetQueuedCompletionStatus(loop->iocp,
-                              &bytes,
-                              &key,
-                              &overlapped,
-                              timeout);
-
-    if (overlapped) {
-      /* Package was dequeued */
-      req = uv_overlapped_to_req(overlapped);
-      uv_insert_pending_req(loop, req);
-
-      /* Some time might have passed waiting for I/O,
-       * so update the loop time here.
-       */
-      uv_update_time(loop);
-    } else if (GetLastError() != WAIT_TIMEOUT) {
-      /* Serious error */
-      uv_fatal_error(GetLastError(), "GetQueuedCompletionStatus");
-    } else if (timeout > 0) {
-      /* GetQueuedCompletionStatus can occasionally return a little early.
-       * Make sure that the desired timeout target time is reached.
-       */
-      uv_update_time(loop);
-      if (timeout_time > loop->time) {
-        timeout = (DWORD)(timeout_time - loop->time);
-        /* The first call to GetQueuedCompletionStatus should return very
-         * close to the target time and the second should reach it, but
-         * this is not stated in the documentation. To make sure a busy
-         * loop cannot happen, the timeout is increased exponentially
-         * starting on the third round.
-         */
-        timeout += repeat ? (1 << (repeat - 1)) : 0;
-        continue;
-      }
-    }
-    break;
-  }
-}
-
-
-static void uv_poll_ex(uv_loop_t* loop, DWORD timeout) {
+static void uv__poll(uv_loop_t* loop, DWORD timeout) {
   BOOL success;
   uv_req_t* req;
   OVERLAPPED_ENTRY overlappeds[128];
@@ -422,12 +391,12 @@ static void uv_poll_ex(uv_loop_t* loop, DWORD timeout) {
   timeout_time = loop->time + timeout;
 
   for (repeat = 0; ; repeat++) {
-    success = pGetQueuedCompletionStatusEx(loop->iocp,
-                                           overlappeds,
-                                           ARRAY_SIZE(overlappeds),
-                                           &count,
-                                           timeout,
-                                           FALSE);
+    success = GetQueuedCompletionStatusEx(loop->iocp,
+                                          overlappeds,
+                                          ARRAY_SIZE(overlappeds),
+                                          &count,
+                                          timeout,
+                                          FALSE);
 
     if (success) {
       for (i = 0; i < count; i++) {
@@ -485,12 +454,6 @@ int uv_run(uv_loop_t *loop, uv_run_mode mode) {
   DWORD timeout;
   int r;
   int ran_pending;
-  void (*poll)(uv_loop_t* loop, DWORD timeout);
-
-  if (pGetQueuedCompletionStatusEx)
-    poll = &uv_poll_ex;
-  else
-    poll = &uv_poll;
 
   r = uv__loop_alive(loop);
   if (!r)
@@ -498,7 +461,7 @@ int uv_run(uv_loop_t *loop, uv_run_mode mode) {
 
   while (r != 0 && loop->stop_flag == 0) {
     uv_update_time(loop);
-    uv_process_timers(loop);
+    uv__run_timers(loop);
 
     ran_pending = uv_process_reqs(loop);
     uv_idle_invoke(loop);
@@ -508,7 +471,7 @@ int uv_run(uv_loop_t *loop, uv_run_mode mode) {
     if ((mode == UV_RUN_ONCE && !ran_pending) || mode == UV_RUN_DEFAULT)
       timeout = uv_backend_timeout(loop);
 
-    (*poll)(loop, timeout);
+    uv__poll(loop, timeout);
 
     uv_check_invoke(loop);
     uv_process_endgames(loop);
@@ -522,7 +485,7 @@ int uv_run(uv_loop_t *loop, uv_run_mode mode) {
        * UV_RUN_NOWAIT makes no guarantees about progress so it's omitted from
        * the check.
        */
-      uv_process_timers(loop);
+      uv__run_timers(loop);
     }
 
     r = uv__loop_alive(loop);
diff --git a/deps/libuv/src/win/error.c b/deps/libuv/src/win/error.c
index 9b03bfef6..24924ba81 100644
--- a/deps/libuv/src/win/error.c
+++ b/deps/libuv/src/win/error.c
@@ -46,8 +46,8 @@ void uv_fatal_error(const int errorno, const char* syscall) {
     errmsg = "Unknown error";
   }
 
-  /* FormatMessage messages include a newline character already, */
-  /* so don't add another. */
+  /* FormatMessage messages include a newline character already, so don't add
+   * another. */
   if (syscall) {
     fprintf(stderr, "%s: (%d) %s", syscall, errorno, errmsg);
   } else {
diff --git a/deps/libuv/src/win/fs-event.c b/deps/libuv/src/win/fs-event.c
index 14c9af9ad..226e6e7ae 100644
--- a/deps/libuv/src/win/fs-event.c
+++ b/deps/libuv/src/win/fs-event.c
@@ -419,7 +419,7 @@ void uv_process_fs_event_req(uv_loop_t* loop, uv_req_t* req,
    * - We are not active, just ignore the callback
    */
   if (!uv__is_active(handle)) {
-    if (handle->flags & UV__HANDLE_CLOSING) {
+    if (handle->flags & UV_HANDLE_CLOSING) {
       uv_want_endgame(loop, (uv_handle_t*) handle);
     }
     return;
@@ -543,7 +543,7 @@ void uv_process_fs_event_req(uv_loop_t* loop, uv_req_t* req,
         }
 
         offset = file_info->NextEntryOffset;
-      } while (offset && !(handle->flags & UV__HANDLE_CLOSING));
+      } while (offset && !(handle->flags & UV_HANDLE_CLOSING));
     } else {
       handle->cb(handle, NULL, UV_CHANGE, 0);
     }
@@ -552,7 +552,7 @@ void uv_process_fs_event_req(uv_loop_t* loop, uv_req_t* req,
     handle->cb(handle, NULL, 0, uv_translate_sys_error(err));
   }
 
-  if (!(handle->flags & UV__HANDLE_CLOSING)) {
+  if (!(handle->flags & UV_HANDLE_CLOSING)) {
     uv_fs_event_queue_readdirchanges(loop, handle);
   } else {
     uv_want_endgame(loop, (uv_handle_t*)handle);
@@ -573,7 +573,7 @@ void uv_fs_event_close(uv_loop_t* loop, uv_fs_event_t* handle) {
 
 
 void uv_fs_event_endgame(uv_loop_t* loop, uv_fs_event_t* handle) {
-  if ((handle->flags & UV__HANDLE_CLOSING) && !handle->req_pending) {
+  if ((handle->flags & UV_HANDLE_CLOSING) && !handle->req_pending) {
     assert(!(handle->flags & UV_HANDLE_CLOSED));
 
     if (handle->buffer) {
diff --git a/deps/libuv/src/win/fs.c b/deps/libuv/src/win/fs.c
index 30b87ac51..71b6a81a0 100644
--- a/deps/libuv/src/win/fs.c
+++ b/deps/libuv/src/win/fs.c
@@ -326,12 +326,11 @@ INLINE static int fs__readlink_handle(HANDLE handle, char** target_ptr,
         reparse_data->SymbolicLinkReparseBuffer.SubstituteNameLength /
         sizeof(WCHAR);
 
-    /* Real symlinks can contain pretty much everything, but the only thing */
-    /* we really care about is undoing the implicit conversion to an NT */
-    /* namespaced path that CreateSymbolicLink will perform on absolute */
-    /* paths. If the path is win32-namespaced then the user must have */
-    /* explicitly made it so, and we better just return the unmodified */
-    /* reparse data. */
+    /* Real symlinks can contain pretty much everything, but the only thing we
+     * really care about is undoing the implicit conversion to an NT namespaced
+     * path that CreateSymbolicLink will perform on absolute paths. If the path
+     * is win32-namespaced then the user must have explicitly made it so, and
+     * we better just return the unmodified reparse data. */
     if (w_target_len >= 4 &&
         w_target[0] == L'\\' &&
         w_target[1] == L'?' &&
@@ -352,8 +351,8 @@ INLINE static int fs__readlink_handle(HANDLE handle, char** target_ptr,
                  (w_target[5] == L'N' || w_target[5] == L'n') &&
                  (w_target[6] == L'C' || w_target[6] == L'c') &&
                  w_target[7] == L'\\') {
-        /* \??\UNC\<server>\<share>\ - make sure the final path looks like */
-        /* \\<server>\<share>\ */
+        /* \??\UNC\<server>\<share>\ - make sure the final path looks like
+         * \\<server>\<share>\ */
         w_target += 6;
         w_target[0] = L'\\';
         w_target_len -= 6;
@@ -368,11 +367,11 @@ INLINE static int fs__readlink_handle(HANDLE handle, char** target_ptr,
     w_target_len = reparse_data->MountPointReparseBuffer.SubstituteNameLength /
         sizeof(WCHAR);
 
-    /* Only treat junctions that look like \??\<drive>:\ as symlink. */
-    /* Junctions can also be used as mount points, like \??\Volume{<guid>}, */
-    /* but that's confusing for programs since they wouldn't be able to */
-    /* actually understand such a path when returned by uv_readlink(). */
-    /* UNC paths are never valid for junctions so we don't care about them. */
+    /* Only treat junctions that look like \??\<drive>:\ as symlink. Junctions
+     * can also be used as mount points, like \??\Volume{<guid>}, but that's
+     * confusing for programs since they wouldn't be able to actually
+     * understand such a path when returned by uv_readlink(). UNC paths are
+     * never valid for junctions so we don't care about them. */
     if (!(w_target_len >= 6 &&
           w_target[0] == L'\\' &&
           w_target[1] == L'?' &&
@@ -409,8 +408,8 @@ void fs__open(uv_fs_t* req) {
   int fd, current_umask;
   int flags = req->fs.info.file_flags;
 
-  /* Obtain the active umask. umask() never fails and returns the previous */
-  /* umask. */
+  /* Obtain the active umask. umask() never fails and returns the previous
+   * umask. */
   current_umask = umask(0);
   umask(current_umask);
 
@@ -530,8 +529,8 @@ void fs__open(uv_fs_t* req) {
     DWORD error = GetLastError();
     if (error == ERROR_FILE_EXISTS && (flags & UV_FS_O_CREAT) &&
         !(flags & UV_FS_O_EXCL)) {
-      /* Special case: when ERROR_FILE_EXISTS happens and UV_FS_O_CREAT was */
-      /* specified, it means the path referred to a directory. */
+      /* Special case: when ERROR_FILE_EXISTS happens and UV_FS_O_CREAT was
+       * specified, it means the path referred to a directory. */
       SET_REQ_UV_ERROR(req, UV_EISDIR, error);
     } else {
       SET_REQ_WIN32_ERROR(req, GetLastError());
@@ -756,9 +755,9 @@ void fs__unlink(uv_fs_t* req) {
   }
 
   if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
-    /* Do not allow deletion of directories, unless it is a symlink. When */
-    /* the path refers to a non-symlink directory, report EPERM as mandated */
-    /* by POSIX.1. */
+    /* Do not allow deletion of directories, unless it is a symlink. When the
+     * path refers to a non-symlink directory, report EPERM as mandated by
+     * POSIX.1. */
 
     /* Check if it is a reparse point. If it's not, it's a normal directory. */
     if (!(info.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
@@ -767,8 +766,8 @@ void fs__unlink(uv_fs_t* req) {
       return;
     }
 
-    /* Read the reparse point and check if it is a valid symlink. */
-    /* If not, don't unlink. */
+    /* Read the reparse point and check if it is a valid symlink. If not, don't
+     * unlink. */
     if (fs__readlink_handle(handle, NULL, NULL) < 0) {
       DWORD error = GetLastError();
       if (error == ERROR_SYMLINK_NOT_SUPPORTED)
@@ -1490,6 +1489,7 @@ static void fs__chmod(uv_fs_t* req) {
 
 static void fs__fchmod(uv_fs_t* req) {
   int fd = req->file.fd;
+  int clear_archive_flag;
   HANDLE handle;
   NTSTATUS nt_status;
   IO_STATUS_BLOCK io_status;
@@ -1497,7 +1497,11 @@ static void fs__fchmod(uv_fs_t* req) {
 
   VERIFY_FD(fd, req);
 
-  handle = uv__get_osfhandle(fd);
+  handle = ReOpenFile(uv__get_osfhandle(fd), FILE_WRITE_ATTRIBUTES, 0, 0);
+  if (handle == INVALID_HANDLE_VALUE) {
+    SET_REQ_WIN32_ERROR(req, GetLastError());
+    return;
+  }
 
   nt_status = pNtQueryInformationFile(handle,
                                       &io_status,
@@ -1507,7 +1511,27 @@ static void fs__fchmod(uv_fs_t* req) {
 
   if (!NT_SUCCESS(nt_status)) {
     SET_REQ_WIN32_ERROR(req, pRtlNtStatusToDosError(nt_status));
-    return;
+    goto fchmod_cleanup;
+  }
+ 
+  /* Test if the Archive attribute is cleared */
+  if ((file_info.FileAttributes & FILE_ATTRIBUTE_ARCHIVE) == 0) {
+      /* Set Archive flag, otherwise setting or clearing the read-only 
+         flag will not work */
+      file_info.FileAttributes |= FILE_ATTRIBUTE_ARCHIVE;
+      nt_status = pNtSetInformationFile(handle,
+                                        &io_status,
+                                        &file_info,
+                                        sizeof file_info,
+                                        FileBasicInformation);
+      if (!NT_SUCCESS(nt_status)) {
+        SET_REQ_WIN32_ERROR(req, pRtlNtStatusToDosError(nt_status));
+        goto fchmod_cleanup;
+      }
+      /* Remeber to clear the flag later on */
+      clear_archive_flag = 1;
+  } else {
+      clear_archive_flag = 0;
   }
 
   if (req->fs.info.mode & _S_IWRITE) {
@@ -1524,10 +1548,28 @@ static void fs__fchmod(uv_fs_t* req) {
 
   if (!NT_SUCCESS(nt_status)) {
     SET_REQ_WIN32_ERROR(req, pRtlNtStatusToDosError(nt_status));
-    return;
+    goto fchmod_cleanup;
+  }
+
+  if (clear_archive_flag) {
+      file_info.FileAttributes &= ~FILE_ATTRIBUTE_ARCHIVE;
+      if (file_info.FileAttributes == 0) {
+          file_info.FileAttributes = FILE_ATTRIBUTE_NORMAL;
+      }
+      nt_status = pNtSetInformationFile(handle,
+                                        &io_status,
+                                        &file_info,
+                                        sizeof file_info,
+                                        FileBasicInformation);
+      if (!NT_SUCCESS(nt_status)) {
+        SET_REQ_WIN32_ERROR(req, pRtlNtStatusToDosError(nt_status));
+        goto fchmod_cleanup;
+      }
   }
 
   SET_REQ_SUCCESS(req);
+fchmod_cleanup:
+  CloseHandle(handle);
 }
 
 
@@ -1787,17 +1829,13 @@ static void fs__symlink(uv_fs_t* req) {
     fs__create_junction(req, pathw, new_pathw);
     return;
   }
-  if (!pCreateSymbolicLinkW) {
-    SET_REQ_UV_ERROR(req, UV_ENOSYS, ERROR_NOT_SUPPORTED);
-    return;
-  }
 
   if (req->fs.info.file_flags & UV_FS_SYMLINK_DIR)
     flags = SYMBOLIC_LINK_FLAG_DIRECTORY | uv__file_symlink_usermode_flag;
   else
     flags = uv__file_symlink_usermode_flag;
 
-  if (pCreateSymbolicLinkW(new_pathw, pathw, flags)) {
+  if (CreateSymbolicLinkW(new_pathw, pathw, flags)) {
     SET_REQ_RESULT(req, 0);
     return;
   }
@@ -1854,7 +1892,7 @@ static size_t fs__realpath_handle(HANDLE handle, char** realpath_ptr) {
   WCHAR* w_realpath_ptr = NULL;
   WCHAR* w_realpath_buf;
 
-  w_realpath_len = pGetFinalPathNameByHandleW(handle, NULL, 0, VOLUME_NAME_DOS);
+  w_realpath_len = GetFinalPathNameByHandleW(handle, NULL, 0, VOLUME_NAME_DOS);
   if (w_realpath_len == 0) {
     return -1;
   }
@@ -1866,10 +1904,8 @@ static size_t fs__realpath_handle(HANDLE handle, char** realpath_ptr) {
   }
   w_realpath_ptr = w_realpath_buf;
 
-  if (pGetFinalPathNameByHandleW(handle,
-                                w_realpath_ptr,
-                                w_realpath_len,
-                                VOLUME_NAME_DOS) == 0) {
+  if (GetFinalPathNameByHandleW(
+          handle, w_realpath_ptr, w_realpath_len, VOLUME_NAME_DOS) == 0) {
     uv__free(w_realpath_buf);
     SetLastError(ERROR_INVALID_HANDLE);
     return -1;
@@ -1901,11 +1937,6 @@ static size_t fs__realpath_handle(HANDLE handle, char** realpath_ptr) {
 static void fs__realpath(uv_fs_t* req) {
   HANDLE handle;
 
-  if (!pGetFinalPathNameByHandleW) {
-    SET_REQ_UV_ERROR(req, UV_ENOSYS, ERROR_NOT_SUPPORTED);
-    return;
-  }
-
   handle = CreateFileW(req->file.pathw,
                        0,
                        0,
@@ -1940,6 +1971,10 @@ static void fs__fchown(uv_fs_t* req) {
 }
 
 
+static void fs__lchown(uv_fs_t* req) {
+  req->result = 0;
+}
+
 static void uv__fs_work(struct uv__work* w) {
   uv_fs_t* req;
 
@@ -1977,6 +2012,7 @@ static void uv__fs_work(struct uv__work* w) {
     XX(REALPATH, realpath)
     XX(CHOWN, chown)
     XX(FCHOWN, fchown);
+    XX(LCHOWN, lchown);
     default:
       assert(!"bad uv_fs_type");
   }
@@ -2262,6 +2298,19 @@ int uv_fs_fchown(uv_loop_t* loop, uv_fs_t* req, uv_file fd, uv_uid_t uid,
 }
 
 
+int uv_fs_lchown(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_uid_t uid,
+    uv_gid_t gid, uv_fs_cb cb) {
+  int err;
+
+  INIT(UV_FS_LCHOWN);
+  err = fs__capture_path(req, path, NULL, cb != NULL);
+  if (err) {
+    return uv_translate_sys_error(err);
+  }
+  POST;
+}
+
+
 int uv_fs_stat(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb) {
   int err;
 
diff --git a/deps/libuv/src/win/getaddrinfo.c b/deps/libuv/src/win/getaddrinfo.c
index 282d919cf..063b4937c 100644
--- a/deps/libuv/src/win/getaddrinfo.c
+++ b/deps/libuv/src/win/getaddrinfo.c
@@ -71,8 +71,8 @@ int uv__getaddrinfo_translate_error(int sys_err) {
 #endif
 
 
-/* adjust size value to be multiple of 4. Use to keep pointer aligned */
-/* Do we need different versions of this for different architectures? */
+/* Adjust size value to be multiple of 4. Use to keep pointer aligned.
+ * Do we need different versions of this for different architectures? */
 #define ALIGNED_SIZE(X)     ((((X) + 3) >> 2) << 2)
 
 #ifndef NDIS_IF_MAX_STRING_SIZE
@@ -124,8 +124,7 @@ static void uv__getaddrinfo_done(struct uv__work* w, int status) {
   }
 
   if (req->retcode == 0) {
-    /* convert addrinfoW to addrinfo */
-    /* first calculate required length */
+    /* Convert addrinfoW to addrinfo. First calculate required length. */
     addrinfow_ptr = req->addrinfow;
     while (addrinfow_ptr != NULL) {
       addrinfo_len += addrinfo_struct_len +
@@ -313,8 +312,8 @@ int uv_getaddrinfo(uv_loop_t* loop,
   /* save alloc_ptr now so we can free if error */
   req->alloc = (void*)alloc_ptr;
 
-  /* convert node string to UTF16 into allocated memory and save pointer in */
-  /* the request. */
+  /* Convert node string to UTF16 into allocated memory and save pointer in the
+   * request. */
   if (node != NULL) {
     req->node = (WCHAR*)alloc_ptr;
     if (MultiByteToWideChar(CP_UTF8,
@@ -331,8 +330,8 @@ int uv_getaddrinfo(uv_loop_t* loop,
     req->node = NULL;
   }
 
-  /* convert service string to UTF16 into allocated memory and save pointer */
-  /* in the req. */
+  /* Convert service string to UTF16 into allocated memory and save pointer in
+   * the req. */
   if (service != NULL) {
     req->service = (WCHAR*)alloc_ptr;
     if (MultiByteToWideChar(CP_UTF8,
diff --git a/deps/libuv/src/win/handle-inl.h b/deps/libuv/src/win/handle-inl.h
index 8d0334cc5..82c657d57 100644
--- a/deps/libuv/src/win/handle-inl.h
+++ b/deps/libuv/src/win/handle-inl.h
@@ -32,7 +32,7 @@
 #define DECREASE_ACTIVE_COUNT(loop, handle)                             \
   do {                                                                  \
     if (--(handle)->activecnt == 0 &&                                   \
-        !((handle)->flags & UV__HANDLE_CLOSING)) {                      \
+        !((handle)->flags & UV_HANDLE_CLOSING)) {                       \
       uv__handle_stop((handle));                                        \
     }                                                                   \
     assert((handle)->activecnt >= 0);                                   \
@@ -53,7 +53,7 @@
     assert(handle->reqs_pending > 0);                                   \
     handle->reqs_pending--;                                             \
                                                                         \
-    if (handle->flags & UV__HANDLE_CLOSING &&                           \
+    if (handle->flags & UV_HANDLE_CLOSING &&                            \
         handle->reqs_pending == 0) {                                    \
       uv_want_endgame(loop, (uv_handle_t*)handle);                      \
     }                                                                   \
@@ -62,14 +62,14 @@
 
 #define uv__handle_closing(handle)                                      \
   do {                                                                  \
-    assert(!((handle)->flags & UV__HANDLE_CLOSING));                    \
+    assert(!((handle)->flags & UV_HANDLE_CLOSING));                     \
                                                                         \
-    if (!(((handle)->flags & UV__HANDLE_ACTIVE) &&                      \
-          ((handle)->flags & UV__HANDLE_REF)))                          \
+    if (!(((handle)->flags & UV_HANDLE_ACTIVE) &&                       \
+          ((handle)->flags & UV_HANDLE_REF)))                           \
       uv__active_handle_add((uv_handle_t*) (handle));                   \
                                                                         \
-    (handle)->flags |= UV__HANDLE_CLOSING;                              \
-    (handle)->flags &= ~UV__HANDLE_ACTIVE;                              \
+    (handle)->flags |= UV_HANDLE_CLOSING;                               \
+    (handle)->flags &= ~UV_HANDLE_ACTIVE;                               \
   } while (0)
 
 
@@ -126,7 +126,8 @@ INLINE static void uv_process_endgames(uv_loop_t* loop) {
         break;
 
       case UV_TIMER:
-        uv_timer_endgame(loop, (uv_timer_t*) handle);
+        uv__timer_close((uv_timer_t*) handle);
+        uv__handle_close(handle);
         break;
 
       case UV_PREPARE:
@@ -164,10 +165,10 @@ INLINE static void uv_process_endgames(uv_loop_t* loop) {
 
 INLINE static HANDLE uv__get_osfhandle(int fd)
 {
-  /* _get_osfhandle() raises an assert in debug builds if the FD is invalid. */
-  /* But  it also correctly checks the FD and returns INVALID_HANDLE_VALUE */
-  /* for invalid FDs in release builds (or if you let the assert continue).  */
-  /* So this wrapper function disables asserts when calling _get_osfhandle. */
+  /* _get_osfhandle() raises an assert in debug builds if the FD is invalid.
+   * But it also correctly checks the FD and returns INVALID_HANDLE_VALUE for
+   * invalid FDs in release builds (or if you let the assert continue). So this
+   * wrapper function disables asserts when calling _get_osfhandle. */
 
   HANDLE handle;
   UV_BEGIN_DISABLE_CRT_ASSERT();
diff --git a/deps/libuv/src/win/handle.c b/deps/libuv/src/win/handle.c
index 39150702d..738d7ff32 100644
--- a/deps/libuv/src/win/handle.c
+++ b/deps/libuv/src/win/handle.c
@@ -59,15 +59,15 @@ uv_handle_type uv_guess_handle(uv_file file) {
 
 
 int uv_is_active(const uv_handle_t* handle) {
-  return (handle->flags & UV__HANDLE_ACTIVE) &&
-        !(handle->flags & UV__HANDLE_CLOSING);
+  return (handle->flags & UV_HANDLE_ACTIVE) &&
+        !(handle->flags & UV_HANDLE_CLOSING);
 }
 
 
 void uv_close(uv_handle_t* handle, uv_close_cb cb) {
   uv_loop_t* loop = handle->loop;
 
-  if (handle->flags & UV__HANDLE_CLOSING) {
+  if (handle->flags & UV_HANDLE_CLOSING) {
     assert(0);
     return;
   }
@@ -150,7 +150,7 @@ void uv_close(uv_handle_t* handle, uv_close_cb cb) {
 
 
 int uv_is_closing(const uv_handle_t* handle) {
-  return !!(handle->flags & (UV__HANDLE_CLOSING | UV_HANDLE_CLOSED));
+  return !!(handle->flags & (UV_HANDLE_CLOSING | UV_HANDLE_CLOSED));
 }
 
 
diff --git a/deps/libuv/src/win/internal.h b/deps/libuv/src/win/internal.h
index cce4e204d..b37b4c0c9 100644
--- a/deps/libuv/src/win/internal.h
+++ b/deps/libuv/src/win/internal.h
@@ -25,7 +25,7 @@
 #include "uv.h"
 #include "../uv-common.h"
 
-#include "tree.h"
+#include "uv/tree.h"
 #include "winapi.h"
 #include "winsock.h"
 
@@ -57,78 +57,15 @@ extern UV_THREAD_LOCAL int uv__crt_assert_enabled;
 #define UV_END_DISABLE_CRT_ASSERT()
 #endif
 
-/*
- * Handles
- * (also see handle-inl.h)
- */
-
-/* Used by all handles. */
-#define UV_HANDLE_CLOSED                        0x00000002
-#define UV_HANDLE_ENDGAME_QUEUED                0x00000008
-
-/* uv-common.h: #define UV__HANDLE_CLOSING      0x00000001 */
-/* uv-common.h: #define UV__HANDLE_ACTIVE       0x00000040 */
-/* uv-common.h: #define UV__HANDLE_REF          0x00000020 */
-/* uv-common.h: #define UV_HANDLE_INTERNAL      0x00000080 */
-
-/* Used by streams and UDP handles. */
-#define UV_HANDLE_READING                       0x00000100
-#define UV_HANDLE_BOUND                         0x00000200
-#define UV_HANDLE_LISTENING                     0x00000800
-#define UV_HANDLE_CONNECTION                    0x00001000
-#define UV_HANDLE_READABLE                      0x00008000
-#define UV_HANDLE_WRITABLE                      0x00010000
-#define UV_HANDLE_READ_PENDING                  0x00020000
-#define UV_HANDLE_SYNC_BYPASS_IOCP              0x00040000
-#define UV_HANDLE_ZERO_READ                     0x00080000
-#define UV_HANDLE_EMULATE_IOCP                  0x00100000
-#define UV_HANDLE_BLOCKING_WRITES               0x00200000
-#define UV_HANDLE_CANCELLATION_PENDING          0x00400000
-
-/* Used by uv_tcp_t and uv_udp_t handles */
-#define UV_HANDLE_IPV6                          0x01000000
-
-/* Only used by uv_tcp_t handles. */
-#define UV_HANDLE_TCP_NODELAY                   0x02000000
-#define UV_HANDLE_TCP_KEEPALIVE                 0x04000000
-#define UV_HANDLE_TCP_SINGLE_ACCEPT             0x08000000
-#define UV_HANDLE_TCP_ACCEPT_STATE_CHANGING     0x10000000
-#define UV_HANDLE_TCP_SOCKET_CLOSED             0x20000000
-#define UV_HANDLE_SHARED_TCP_SOCKET             0x40000000
-
-/* Only used by uv_pipe_t handles. */
-#define UV_HANDLE_NON_OVERLAPPED_PIPE           0x01000000
-#define UV_HANDLE_PIPESERVER                    0x02000000
-#define UV_HANDLE_PIPE_READ_CANCELABLE          0x04000000
-
-/* Only used by uv_tty_t handles. */
-#define UV_HANDLE_TTY_READABLE                  0x01000000
-#define UV_HANDLE_TTY_RAW                       0x02000000
-#define UV_HANDLE_TTY_SAVED_POSITION            0x04000000
-#define UV_HANDLE_TTY_SAVED_ATTRIBUTES          0x08000000
-
-/* Only used by uv_poll_t handles. */
-#define UV_HANDLE_POLL_SLOW                     0x02000000
-
-
-/*
- * Requests: see req-inl.h
- */
-
-
-/*
- * Streams: see stream-inl.h
- */
-
-
 /*
  * TCP
  */
 
 typedef struct {
   WSAPROTOCOL_INFOW socket_info;
-  int delayed_error;
-} uv__ipc_socket_info_ex;
+  uint32_t delayed_error;
+  uint32_t flags; /* Either zero or UV_HANDLE_CONNECTION. */
+} uv__ipc_socket_xfer_info_t;
 
 int uv_tcp_listen(uv_tcp_t* handle, int backlog, uv_connection_cb cb);
 int uv_tcp_accept(uv_tcp_t* server, uv_tcp_t* client);
@@ -150,11 +87,10 @@ void uv_process_tcp_connect_req(uv_loop_t* loop, uv_tcp_t* handle,
 void uv_tcp_close(uv_loop_t* loop, uv_tcp_t* tcp);
 void uv_tcp_endgame(uv_loop_t* loop, uv_tcp_t* handle);
 
-int uv_tcp_import(uv_tcp_t* tcp, uv__ipc_socket_info_ex* socket_info_ex,
-    int tcp_connection);
-
-int uv_tcp_duplicate_socket(uv_tcp_t* handle, int pid,
-    LPWSAPROTOCOL_INFOW protocol_info);
+int uv__tcp_xfer_export(uv_tcp_t* handle,
+                        int pid,
+                        uv__ipc_socket_xfer_info_t* xfer_info);
+int uv__tcp_xfer_import(uv_tcp_t* tcp, uv__ipc_socket_xfer_info_t* xfer_info);
 
 
 /*
@@ -178,14 +114,14 @@ int uv_pipe_listen(uv_pipe_t* handle, int backlog, uv_connection_cb cb);
 int uv_pipe_accept(uv_pipe_t* server, uv_stream_t* client);
 int uv_pipe_read_start(uv_pipe_t* handle, uv_alloc_cb alloc_cb,
     uv_read_cb read_cb);
-int uv_pipe_write(uv_loop_t* loop, uv_write_t* req, uv_pipe_t* handle,
-    const uv_buf_t bufs[], unsigned int nbufs, uv_write_cb cb);
-int uv_pipe_write2(uv_loop_t* loop, uv_write_t* req, uv_pipe_t* handle,
-    const uv_buf_t bufs[], unsigned int nbufs, uv_stream_t* send_handle,
-    uv_write_cb cb);
-void uv__pipe_pause_read(uv_pipe_t* handle);
-void uv__pipe_unpause_read(uv_pipe_t* handle);
-void uv__pipe_stop_read(uv_pipe_t* handle);
+void uv__pipe_read_stop(uv_pipe_t* handle);
+int uv__pipe_write(uv_loop_t* loop,
+                   uv_write_t* req,
+                   uv_pipe_t* handle,
+                   const uv_buf_t bufs[],
+                   size_t nbufs,
+                   uv_stream_t* send_handle,
+                   uv_write_cb cb);
 
 void uv_process_pipe_read_req(uv_loop_t* loop, uv_pipe_t* handle,
     uv_req_t* req);
@@ -247,15 +183,6 @@ int uv_poll_close(uv_loop_t* loop, uv_poll_t* handle);
 void uv_poll_endgame(uv_loop_t* loop, uv_poll_t* handle);
 
 
-/*
- * Timers
- */
-void uv_timer_endgame(uv_loop_t* loop, uv_timer_t* handle);
-
-DWORD uv__next_timeout(const uv_loop_t* loop);
-void uv_process_timers(uv_loop_t* loop);
-
-
 /*
  * Loop watchers
  */
@@ -332,7 +259,6 @@ void uv__fs_poll_endgame(uv_loop_t* loop, uv_fs_poll_t* handle);
 void uv__util_init(void);
 
 uint64_t uv__hrtime(double scale);
-int uv_current_pid(void);
 __declspec(noreturn) void uv_fatal_error(const int errorno, const char* syscall);
 int uv__getpwuid_r(uv_passwd_t* pwd);
 int uv__convert_utf16_to_utf8(const WCHAR* utf16, int utf16len, char** utf8);
diff --git a/deps/libuv/src/win/loop-watcher.c b/deps/libuv/src/win/loop-watcher.c
index 20e4509f8..ad7fbea16 100644
--- a/deps/libuv/src/win/loop-watcher.c
+++ b/deps/libuv/src/win/loop-watcher.c
@@ -27,7 +27,7 @@
 
 
 void uv_loop_watcher_endgame(uv_loop_t* loop, uv_handle_t* handle) {
-  if (handle->flags & UV__HANDLE_CLOSING) {
+  if (handle->flags & UV_HANDLE_CLOSING) {
     assert(!(handle->flags & UV_HANDLE_CLOSED));
     handle->flags |= UV_HANDLE_CLOSED;
     uv__handle_close(handle);
diff --git a/deps/libuv/src/win/pipe.c b/deps/libuv/src/win/pipe.c
index 0ecfbf1f0..42380f659 100644
--- a/deps/libuv/src/win/pipe.c
+++ b/deps/libuv/src/win/pipe.c
@@ -21,9 +21,9 @@
 
 #include <assert.h>
 #include <io.h>
-#include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "uv.h"
 #include "internal.h"
@@ -34,26 +34,14 @@
 #include <aclapi.h>
 #include <accctrl.h>
 
-typedef struct uv__ipc_queue_item_s uv__ipc_queue_item_t;
-
-struct uv__ipc_queue_item_s {
-  /*
-   * NOTE: It is important for socket_info_ex to be the first field,
-   * because we will we assigning it to the pending_ipc_info.socket_info
-   */
-  uv__ipc_socket_info_ex socket_info_ex;
-  QUEUE member;
-  int tcp_connection;
-};
-
 /* A zero-size buffer for use by uv_pipe_read */
 static char uv_zero_[] = "";
 
 /* Null uv_buf_t */
 static const uv_buf_t uv_null_buf_ = { 0, NULL };
 
-/* The timeout that the pipe will wait for the remote end to write data */
-/* when the local ends wants to shut it down. */
+/* The timeout that the pipe will wait for the remote end to write data when
+ * the local ends wants to shut it down. */
 static const int64_t eof_timeout = 50; /* ms */
 
 static const int default_pending_pipe_instances = 4;
@@ -62,22 +50,27 @@ static const int default_pending_pipe_instances = 4;
 static char pipe_prefix[] = "\\\\?\\pipe";
 static const int pipe_prefix_len = sizeof(pipe_prefix) - 1;
 
-/* IPC protocol flags. */
-#define UV_IPC_RAW_DATA       0x0001
-#define UV_IPC_TCP_SERVER     0x0002
-#define UV_IPC_TCP_CONNECTION 0x0004
+/* IPC incoming xfer queue item. */
+typedef struct {
+  uv__ipc_socket_xfer_info_t xfer_info;
+  QUEUE member;
+} uv__ipc_xfer_queue_item_t;
+
+/* IPC frame types. */
+enum { UV__IPC_DATA_FRAME = 0, UV__IPC_XFER_FRAME = 1 };
 
 /* IPC frame header. */
 typedef struct {
-  int flags;
-  uint64_t raw_data_length;
-} uv_ipc_frame_header_t;
+  uint32_t type;
+  uint32_t payload_length;
+} uv__ipc_frame_header_t;
 
-/* IPC frame, which contains an imported TCP socket stream. */
+/* Coalesced write request. */
 typedef struct {
-  uv_ipc_frame_header_t header;
-  uv__ipc_socket_info_ex socket_info_ex;
-} uv_ipc_frame_uv_stream;
+  uv_write_t req;       /* Internal heap-allocated write request. */
+  uv_write_t* user_req; /* Pointer to user-specified uv_write_t. */
+} uv__coalesced_write_t;
+
 
 static void eof_timer_init(uv_pipe_t* pipe);
 static void eof_timer_start(uv_pipe_t* pipe);
@@ -98,15 +91,12 @@ int uv_pipe_init(uv_loop_t* loop, uv_pipe_t* handle, int ipc) {
   handle->reqs_pending = 0;
   handle->handle = INVALID_HANDLE_VALUE;
   handle->name = NULL;
-  handle->pipe.conn.ipc_pid = 0;
-  handle->pipe.conn.remaining_ipc_rawdata_bytes = 0;
-  QUEUE_INIT(&handle->pipe.conn.pending_ipc_info.queue);
-  handle->pipe.conn.pending_ipc_info.queue_len = 0;
+  handle->pipe.conn.ipc_remote_pid = 0;
+  handle->pipe.conn.ipc_data_frame.payload_remaining = 0;
+  QUEUE_INIT(&handle->pipe.conn.ipc_xfer_queue);
+  handle->pipe.conn.ipc_xfer_queue_length = 0;
   handle->ipc = ipc;
   handle->pipe.conn.non_overlapped_writes_tail = NULL;
-  handle->pipe.conn.readfile_thread = NULL;
-
-  UV_REQ_INIT(&handle->pipe.conn.ipc_header_write_req, UV_UNKNOWN_REQ);
 
   return 0;
 }
@@ -117,10 +107,9 @@ static void uv_pipe_connection_init(uv_pipe_t* handle) {
   handle->read_req.data = handle;
   handle->pipe.conn.eof_timer = NULL;
   assert(!(handle->flags & UV_HANDLE_PIPESERVER));
-  if (pCancelSynchronousIo &&
-      handle->flags & UV_HANDLE_NON_OVERLAPPED_PIPE) {
-      uv_mutex_init(&handle->pipe.conn.readfile_mutex);
-      handle->flags |= UV_HANDLE_PIPE_READ_CANCELABLE;
+  if (handle->flags & UV_HANDLE_NON_OVERLAPPED_PIPE) {
+    handle->pipe.conn.readfile_thread_handle = NULL;
+    InitializeCriticalSection(&handle->pipe.conn.readfile_thread_lock);
   }
 }
 
@@ -347,12 +336,7 @@ void uv_pipe_endgame(uv_loop_t* loop, uv_pipe_t* handle) {
   NTSTATUS nt_status;
   IO_STATUS_BLOCK io_status;
   FILE_PIPE_LOCAL_INFORMATION pipe_info;
-  uv__ipc_queue_item_t* item;
-
-  if (handle->flags & UV_HANDLE_PIPE_READ_CANCELABLE) {
-    handle->flags &= ~UV_HANDLE_PIPE_READ_CANCELABLE;
-    uv_mutex_destroy(&handle->pipe.conn.readfile_mutex);
-  }
+  uv__ipc_xfer_queue_item_t* xfer_queue_item;
 
   if ((handle->flags & UV_HANDLE_CONNECTION) &&
       handle->stream.conn.shutdown_req != NULL &&
@@ -362,7 +346,7 @@ void uv_pipe_endgame(uv_loop_t* loop, uv_pipe_t* handle) {
     /* Clear the shutdown_req field so we don't go here again. */
     handle->stream.conn.shutdown_req = NULL;
 
-    if (handle->flags & UV__HANDLE_CLOSING) {
+    if (handle->flags & UV_HANDLE_CLOSING) {
       UNREGISTER_HANDLE_REQ(loop, handle, req);
 
       /* Already closing. Cancel the shutdown. */
@@ -423,33 +407,33 @@ void uv_pipe_endgame(uv_loop_t* loop, uv_pipe_t* handle) {
     }
   }
 
-  if (handle->flags & UV__HANDLE_CLOSING &&
+  if (handle->flags & UV_HANDLE_CLOSING &&
       handle->reqs_pending == 0) {
     assert(!(handle->flags & UV_HANDLE_CLOSED));
 
     if (handle->flags & UV_HANDLE_CONNECTION) {
       /* Free pending sockets */
-      while (!QUEUE_EMPTY(&handle->pipe.conn.pending_ipc_info.queue)) {
+      while (!QUEUE_EMPTY(&handle->pipe.conn.ipc_xfer_queue)) {
         QUEUE* q;
         SOCKET socket;
 
-        q = QUEUE_HEAD(&handle->pipe.conn.pending_ipc_info.queue);
+        q = QUEUE_HEAD(&handle->pipe.conn.ipc_xfer_queue);
         QUEUE_REMOVE(q);
-        item = QUEUE_DATA(q, uv__ipc_queue_item_t, member);
+        xfer_queue_item = QUEUE_DATA(q, uv__ipc_xfer_queue_item_t, member);
 
         /* Materialize socket and close it */
         socket = WSASocketW(FROM_PROTOCOL_INFO,
                             FROM_PROTOCOL_INFO,
                             FROM_PROTOCOL_INFO,
-                            &item->socket_info_ex.socket_info,
+                            &xfer_queue_item->xfer_info.socket_info,
                             0,
                             WSA_FLAG_OVERLAPPED);
-        uv__free(item);
+        uv__free(xfer_queue_item);
 
         if (socket != INVALID_SOCKET)
           closesocket(socket);
       }
-      handle->pipe.conn.pending_ipc_info.queue_len = 0;
+      handle->pipe.conn.ipc_xfer_queue_length = 0;
 
       if (handle->flags & UV_HANDLE_EMULATE_IOCP) {
         if (handle->read_req.wait_handle != INVALID_HANDLE_VALUE) {
@@ -461,6 +445,9 @@ void uv_pipe_endgame(uv_loop_t* loop, uv_pipe_t* handle) {
           handle->read_req.event_handle = NULL;
         }
       }
+
+      if (handle->flags & UV_HANDLE_NON_OVERLAPPED_PIPE)
+        DeleteCriticalSection(&handle->pipe.conn.readfile_thread_lock);
     }
 
     if (handle->flags & UV_HANDLE_PIPESERVER) {
@@ -595,8 +582,8 @@ static DWORD WINAPI pipe_connect_thread_proc(void* parameter) {
   loop = handle->loop;
   assert(loop);
 
-  /* We're here because CreateFile on a pipe returned ERROR_PIPE_BUSY. */
-  /* We wait for the pipe to become available with WaitNamedPipe. */
+  /* We're here because CreateFile on a pipe returned ERROR_PIPE_BUSY. We wait
+   * for the pipe to become available with WaitNamedPipe. */
   while (WaitNamedPipeW(handle->name, 30000)) {
     /* The pipe is now available, try to connect. */
     pipeHandle = open_named_pipe(handle->name, &duplex_flags);
@@ -706,48 +693,68 @@ void uv_pipe_connect(uv_connect_t* req, uv_pipe_t* handle,
 }
 
 
-void uv__pipe_pause_read(uv_pipe_t* handle) {
-  if (handle->flags & UV_HANDLE_PIPE_READ_CANCELABLE) {
-      /* Pause the ReadFile task briefly, to work
-         around the Windows kernel bug that causes
-         any access to a NamedPipe to deadlock if
-         any process has called ReadFile */
-      HANDLE h;
-      uv_mutex_lock(&handle->pipe.conn.readfile_mutex);
-      h = handle->pipe.conn.readfile_thread;
-      while (h) {
-        /* spinlock: we expect this to finish quickly,
-           or we are probably about to deadlock anyways
-           (in the kernel), so it doesn't matter */
-        pCancelSynchronousIo(h);
-        SwitchToThread(); /* yield thread control briefly */
-        h = handle->pipe.conn.readfile_thread;
-      }
-  }
-}
+void uv__pipe_interrupt_read(uv_pipe_t* handle) {
+  BOOL r;
+
+  if (!(handle->flags & UV_HANDLE_READ_PENDING))
+    return; /* No pending reads. */
+  if (handle->flags & UV_HANDLE_CANCELLATION_PENDING)
+    return; /* Already cancelled. */
+  if (handle->handle == INVALID_HANDLE_VALUE)
+    return; /* Pipe handle closed. */
 
+  if (!(handle->flags & UV_HANDLE_NON_OVERLAPPED_PIPE)) {
+    /* Cancel asynchronous read. */
+    r = CancelIoEx(handle->handle, &handle->read_req.u.io.overlapped);
+    assert(r || GetLastError() == ERROR_NOT_FOUND);
+
+  } else {
+    /* Cancel synchronous read (which is happening in the thread pool). */
+    HANDLE thread;
+    volatile HANDLE* thread_ptr = &handle->pipe.conn.readfile_thread_handle;
+
+    EnterCriticalSection(&handle->pipe.conn.readfile_thread_lock);
+
+    thread = *thread_ptr;
+    if (thread == NULL) {
+      /* The thread pool thread has not yet reached the point of blocking, we
+       * can pre-empt it by setting thread_handle to INVALID_HANDLE_VALUE. */
+      *thread_ptr = INVALID_HANDLE_VALUE;
+
+    } else {
+      /* Spin until the thread has acknowledged (by setting the thread to
+       * INVALID_HANDLE_VALUE) that it is past the point of blocking. */
+      while (thread != INVALID_HANDLE_VALUE) {
+        r = CancelSynchronousIo(thread);
+        assert(r || GetLastError() == ERROR_NOT_FOUND);
+        SwitchToThread(); /* Yield thread. */
+        thread = *thread_ptr;
+      }
+    }
 
-void uv__pipe_unpause_read(uv_pipe_t* handle) {
-  if (handle->flags & UV_HANDLE_PIPE_READ_CANCELABLE) {
-    uv_mutex_unlock(&handle->pipe.conn.readfile_mutex);
+    LeaveCriticalSection(&handle->pipe.conn.readfile_thread_lock);
   }
+
+  /* Set flag to indicate that read has been cancelled. */
+  handle->flags |= UV_HANDLE_CANCELLATION_PENDING;
 }
 
 
-void uv__pipe_stop_read(uv_pipe_t* handle) {
+void uv__pipe_read_stop(uv_pipe_t* handle) {
   handle->flags &= ~UV_HANDLE_READING;
-  uv__pipe_pause_read((uv_pipe_t*)handle);
-  uv__pipe_unpause_read((uv_pipe_t*)handle);
+  DECREASE_ACTIVE_COUNT(handle->loop, handle);
+
+  uv__pipe_interrupt_read(handle);
 }
 
 
-/* Cleans up uv_pipe_t (server or connection) and all resources associated */
-/* with it. */
+/* Cleans up uv_pipe_t (server or connection) and all resources associated with
+ * it. */
 void uv_pipe_cleanup(uv_loop_t* loop, uv_pipe_t* handle) {
   int i;
   HANDLE pipeHandle;
 
-  uv__pipe_stop_read(handle);
+  uv__pipe_interrupt_read(handle);
 
   if (handle->name) {
     uv__free(handle->name);
@@ -857,23 +864,21 @@ int uv_pipe_accept(uv_pipe_t* server, uv_stream_t* client) {
   uv_pipe_t* pipe_client;
   uv_pipe_accept_t* req;
   QUEUE* q;
-  uv__ipc_queue_item_t* item;
+  uv__ipc_xfer_queue_item_t* item;
   int err;
 
   if (server->ipc) {
-    if (QUEUE_EMPTY(&server->pipe.conn.pending_ipc_info.queue)) {
+    if (QUEUE_EMPTY(&server->pipe.conn.ipc_xfer_queue)) {
       /* No valid pending sockets. */
       return WSAEWOULDBLOCK;
     }
 
-    q = QUEUE_HEAD(&server->pipe.conn.pending_ipc_info.queue);
+    q = QUEUE_HEAD(&server->pipe.conn.ipc_xfer_queue);
     QUEUE_REMOVE(q);
-    server->pipe.conn.pending_ipc_info.queue_len--;
-    item = QUEUE_DATA(q, uv__ipc_queue_item_t, member);
+    server->pipe.conn.ipc_xfer_queue_length--;
+    item = QUEUE_DATA(q, uv__ipc_xfer_queue_item_t, member);
 
-    err = uv_tcp_import((uv_tcp_t*)client,
-                        &item->socket_info_ex,
-                        item->tcp_connection);
+    err = uv__tcp_xfer_import((uv_tcp_t*) client, &item->xfer_info);
     if (err != 0)
       return err;
 
@@ -882,8 +887,8 @@ int uv_pipe_accept(uv_pipe_t* server, uv_stream_t* client) {
   } else {
     pipe_client = (uv_pipe_t*)client;
 
-    /* Find a connection instance that has been connected, but not yet */
-    /* accepted. */
+    /* Find a connection instance that has been connected, but not yet
+     * accepted. */
     req = server->pipe.serv.pending_accepts;
 
     if (!req) {
@@ -901,7 +906,7 @@ int uv_pipe_accept(uv_pipe_t* server, uv_stream_t* client) {
     req->next_pending = NULL;
     req->pipeHandle = INVALID_HANDLE_VALUE;
 
-    if (!(server->flags & UV__HANDLE_CLOSING)) {
+    if (!(server->flags & UV_HANDLE_CLOSING)) {
       uv_pipe_queue_accept(loop, server, req, FALSE);
     }
   }
@@ -946,74 +951,75 @@ int uv_pipe_listen(uv_pipe_t* handle, int backlog, uv_connection_cb cb) {
 }
 
 
-static DWORD WINAPI uv_pipe_zero_readfile_thread_proc(void* parameter) {
-  int result;
-  DWORD bytes;
-  uv_read_t* req = (uv_read_t*) parameter;
+static DWORD WINAPI uv_pipe_zero_readfile_thread_proc(void* arg) {
+  uv_read_t* req = (uv_read_t*) arg;
   uv_pipe_t* handle = (uv_pipe_t*) req->data;
   uv_loop_t* loop = handle->loop;
-  HANDLE hThread = NULL;
+  volatile HANDLE* thread_ptr = &handle->pipe.conn.readfile_thread_handle;
+  CRITICAL_SECTION* lock = &handle->pipe.conn.readfile_thread_lock;
+  HANDLE thread;
+  DWORD bytes;
   DWORD err;
-  uv_mutex_t *m = &handle->pipe.conn.readfile_mutex;
 
-  assert(req != NULL);
   assert(req->type == UV_READ);
   assert(handle->type == UV_NAMED_PIPE);
 
-  if (handle->flags & UV_HANDLE_PIPE_READ_CANCELABLE) {
-    uv_mutex_lock(m); /* mutex controls *setting* of readfile_thread */
-    if (DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
-                        GetCurrentProcess(), &hThread,
-                        0, FALSE, DUPLICATE_SAME_ACCESS)) {
-      handle->pipe.conn.readfile_thread = hThread;
-    } else {
-      hThread = NULL;
-    }
-    uv_mutex_unlock(m);
+  err = 0;
+
+  /* Create a handle to the current thread. */
+  if (!DuplicateHandle(GetCurrentProcess(),
+                       GetCurrentThread(),
+                       GetCurrentProcess(),
+                       &thread,
+                       0,
+                       FALSE,
+                       DUPLICATE_SAME_ACCESS)) {
+    err = GetLastError();
+    goto out1;
   }
-restart_readfile:
-  if (handle->flags & UV_HANDLE_READING) {
-    result = ReadFile(handle->handle,
-                      &uv_zero_,
-                      0,
-                      &bytes,
-                      NULL);
-    if (!result) {
-      err = GetLastError();
-      if (err == ERROR_OPERATION_ABORTED &&
-          handle->flags & UV_HANDLE_PIPE_READ_CANCELABLE) {
-        if (handle->flags & UV_HANDLE_READING) {
-          /* just a brief break to do something else */
-          handle->pipe.conn.readfile_thread = NULL;
-          /* resume after it is finished */
-          uv_mutex_lock(m);
-          handle->pipe.conn.readfile_thread = hThread;
-          uv_mutex_unlock(m);
-          goto restart_readfile;
-        } else {
-          result = 1; /* successfully stopped reading */
-        }
-      }
-    }
+
+  /* The lock needs to be held when thread handle is modified. */
+  EnterCriticalSection(lock);
+  if (*thread_ptr == INVALID_HANDLE_VALUE) {
+    /* uv__pipe_interrupt_read() cancelled reading before we got here. */
+    err = ERROR_OPERATION_ABORTED;
   } else {
-    result = 1; /* successfully aborted read before it even started */
-  }
-  if (hThread) {
-    assert(hThread == handle->pipe.conn.readfile_thread);
-    /* mutex does not control clearing readfile_thread */
-    handle->pipe.conn.readfile_thread = NULL;
-    uv_mutex_lock(m);
-    /* only when we hold the mutex lock is it safe to
-       open or close the handle */
-    CloseHandle(hThread);
-    uv_mutex_unlock(m);
+    /* Let main thread know which worker thread is doing the blocking read. */
+    assert(*thread_ptr == NULL);
+    *thread_ptr = thread;
   }
+  LeaveCriticalSection(lock);
 
-  if (!result) {
-    SET_REQ_ERROR(req, err);
-  }
+  if (err)
+    goto out2;
+
+  /* Block the thread until data is available on the pipe, or the read is
+   * cancelled. */
+  if (!ReadFile(handle->handle, &uv_zero_, 0, &bytes, NULL))
+    err = GetLastError();
+
+  /* Let the main thread know the worker is past the point of blocking. */
+  assert(thread == *thread_ptr);
+  *thread_ptr = INVALID_HANDLE_VALUE;
 
+  /* Briefly acquire the mutex. Since the main thread holds the lock while it
+   * is spinning trying to cancel this thread's I/O, we will block here until
+   * it stops doing that. */
+  EnterCriticalSection(lock);
+  LeaveCriticalSection(lock);
+
+out2:
+  /* Close the handle to the current thread. */
+  CloseHandle(thread);
+
+out1:
+  /* Set request status and post a completion record to the IOCP. */
+  if (err)
+    SET_REQ_ERROR(req, err);
+  else
+    SET_REQ_SUCCESS(req);
   POST_COMPLETION_FOR_REQ(loop, req);
+
   return 0;
 }
 
@@ -1095,6 +1101,7 @@ static void uv_pipe_queue_read(uv_loop_t* loop, uv_pipe_t* handle) {
   req = &handle->read_req;
 
   if (handle->flags & UV_HANDLE_NON_OVERLAPPED_PIPE) {
+    handle->pipe.conn.readfile_thread_handle = NULL; /* Reset cancellation. */
     if (!QueueUserWorkItem(&uv_pipe_zero_readfile_thread_proc,
                            req,
                            WT_EXECUTELONGFUNCTION)) {
@@ -1162,8 +1169,8 @@ int uv_pipe_read_start(uv_pipe_t* handle,
   handle->read_cb = read_cb;
   handle->alloc_cb = alloc_cb;
 
-  /* If reading was stopped and then started again, there could still be a */
-  /* read request pending. */
+  /* If reading was stopped and then started again, there could still be a read
+   * request pending. */
   if (!(handle->flags & UV_HANDLE_READ_PENDING))
     uv_pipe_queue_read(loop, handle);
 
@@ -1219,154 +1226,111 @@ static void uv_queue_non_overlapped_write(uv_pipe_t* handle) {
 }
 
 
-static int uv_pipe_write_impl(uv_loop_t* loop,
-                              uv_write_t* req,
-                              uv_pipe_t* handle,
-                              const uv_buf_t bufs[],
-                              unsigned int nbufs,
-                              uv_stream_t* send_handle,
-                              uv_write_cb cb) {
-  int err;
-  int result;
-  uv_tcp_t* tcp_send_handle;
-  uv_write_t* ipc_header_req = NULL;
-  uv_ipc_frame_uv_stream ipc_frame;
+static int uv__build_coalesced_write_req(uv_write_t* user_req,
+                                         const uv_buf_t bufs[],
+                                         size_t nbufs,
+                                         uv_write_t** req_out,
+                                         uv_buf_t* write_buf_out) {
+  /* Pack into a single heap-allocated buffer:
+   *   (a) a uv_write_t structure where libuv stores the actual state.
+   *   (b) a pointer to the original uv_write_t.
+   *   (c) data from all `bufs` entries.
+   */
+  char* heap_buffer;
+  size_t heap_buffer_length, heap_buffer_offset;
+  uv__coalesced_write_t* coalesced_write_req; /* (a) + (b) */
+  char* data_start;                           /* (c) */
+  size_t data_length;
+  unsigned int i;
+
+  /* Compute combined size of all combined buffers from `bufs`. */
+  data_length = 0;
+  for (i = 0; i < nbufs; i++)
+    data_length += bufs[i].len;
+
+  /* The total combined size of data buffers should not exceed UINT32_MAX,
+   * because WriteFile() won't accept buffers larger than that. */
+  if (data_length > UINT32_MAX)
+    return WSAENOBUFS; /* Maps to UV_ENOBUFS. */
+
+  /* Compute heap buffer size. */
+  heap_buffer_length = sizeof *coalesced_write_req + /* (a) + (b) */
+                       data_length;                  /* (c) */
+
+  /* Allocate buffer. */
+  heap_buffer = uv__malloc(heap_buffer_length);
+  if (heap_buffer == NULL)
+    return ERROR_NOT_ENOUGH_MEMORY; /* Maps to UV_ENOMEM. */
+
+  /* Copy uv_write_t information to the buffer. */
+  coalesced_write_req = (uv__coalesced_write_t*) heap_buffer;
+  coalesced_write_req->req = *user_req; /* copy (a) */
+  coalesced_write_req->req.coalesced = 1;
+  coalesced_write_req->user_req = user_req;         /* copy (b) */
+  heap_buffer_offset = sizeof *coalesced_write_req; /* offset (a) + (b) */
+
+  /* Copy data buffers to the heap buffer. */
+  data_start = &heap_buffer[heap_buffer_offset];
+  for (i = 0; i < nbufs; i++) {
+    memcpy(&heap_buffer[heap_buffer_offset],
+           bufs[i].base,
+           bufs[i].len);               /* copy (c) */
+    heap_buffer_offset += bufs[i].len; /* offset (c) */
+  }
+  assert(heap_buffer_offset == heap_buffer_length);
+
+  /* Set out arguments and return. */
+  *req_out = &coalesced_write_req->req;
+  *write_buf_out = uv_buf_init(data_start, (unsigned int) data_length);
+  return 0;
+}
 
-  if (nbufs != 1 && (nbufs != 0 || !send_handle)) {
-    return ERROR_NOT_SUPPORTED;
-  }
 
-  /* Only TCP handles are supported for sharing. */
-  if (send_handle && ((send_handle->type != UV_TCP) ||
-      (!(send_handle->flags & UV_HANDLE_BOUND) &&
-       !(send_handle->flags & UV_HANDLE_CONNECTION)))) {
-    return ERROR_NOT_SUPPORTED;
-  }
+static int uv__pipe_write_data(uv_loop_t* loop,
+                               uv_write_t* req,
+                               uv_pipe_t* handle,
+                               const uv_buf_t bufs[],
+                               size_t nbufs,
+                               uv_stream_t* send_handle,
+                               uv_write_cb cb,
+                               int copy_always) {
+  int err;
+  int result;
+  uv_buf_t write_buf;
 
   assert(handle->handle != INVALID_HANDLE_VALUE);
 
   UV_REQ_INIT(req, UV_WRITE);
   req->handle = (uv_stream_t*) handle;
+  req->send_handle = send_handle;
   req->cb = cb;
-  req->ipc_header = 0;
+  /* Private fields. */
+  req->coalesced = 0;
   req->event_handle = NULL;
   req->wait_handle = INVALID_HANDLE_VALUE;
   memset(&req->u.io.overlapped, 0, sizeof(req->u.io.overlapped));
-
-  if (handle->ipc) {
-    assert(!(handle->flags & UV_HANDLE_NON_OVERLAPPED_PIPE));
-    ipc_frame.header.flags = 0;
-
-    /* Use the IPC framing protocol. */
-    if (send_handle) {
-      tcp_send_handle = (uv_tcp_t*)send_handle;
-
-      if (handle->pipe.conn.ipc_pid == 0) {
-          handle->pipe.conn.ipc_pid = uv_current_pid();
-      }
-
-      err = uv_tcp_duplicate_socket(tcp_send_handle, handle->pipe.conn.ipc_pid,
-          &ipc_frame.socket_info_ex.socket_info);
-      if (err) {
-        return err;
-      }
-
-      ipc_frame.socket_info_ex.delayed_error = tcp_send_handle->delayed_error;
-
-      ipc_frame.header.flags |= UV_IPC_TCP_SERVER;
-
-      if (tcp_send_handle->flags & UV_HANDLE_CONNECTION) {
-        ipc_frame.header.flags |= UV_IPC_TCP_CONNECTION;
-      }
-    }
-
-    if (nbufs == 1) {
-      ipc_frame.header.flags |= UV_IPC_RAW_DATA;
-      ipc_frame.header.raw_data_length = bufs[0].len;
-    }
-
-    /*
-     * Use the provided req if we're only doing a single write.
-     * If we're doing multiple writes, use ipc_header_write_req to do
-     * the first write, and then use the provided req for the second write.
-     */
-    if (!(ipc_frame.header.flags & UV_IPC_RAW_DATA)) {
-      ipc_header_req = req;
-    } else {
-      /*
-       * Try to use the preallocated write req if it's available.
-       * Otherwise allocate a new one.
-       */
-      if (handle->pipe.conn.ipc_header_write_req.type != UV_WRITE) {
-        ipc_header_req = (uv_write_t*)&handle->pipe.conn.ipc_header_write_req;
-      } else {
-        ipc_header_req = (uv_write_t*)uv__malloc(sizeof(uv_write_t));
-        if (!ipc_header_req) {
-          uv_fatal_error(ERROR_OUTOFMEMORY, "uv__malloc");
-        }
-      }
-
-      UV_REQ_INIT(ipc_header_req, UV_WRITE);
-      ipc_header_req->handle = (uv_stream_t*) handle;
-      ipc_header_req->cb = NULL;
-      ipc_header_req->ipc_header = 1;
-    }
-
-    /* Write the header or the whole frame. */
-    memset(&ipc_header_req->u.io.overlapped, 0,
-           sizeof(ipc_header_req->u.io.overlapped));
-
-    /* Using overlapped IO, but wait for completion before returning.
-       This write is blocking because ipc_frame is on stack. */
-    ipc_header_req->u.io.overlapped.hEvent = CreateEvent(NULL, 1, 0, NULL);
-    if (!ipc_header_req->u.io.overlapped.hEvent) {
-      uv_fatal_error(GetLastError(), "CreateEvent");
-    }
-
-    result = WriteFile(handle->handle,
-                        &ipc_frame,
-                        ipc_frame.header.flags & UV_IPC_TCP_SERVER ?
-                          sizeof(ipc_frame) : sizeof(ipc_frame.header),
-                        NULL,
-                        &ipc_header_req->u.io.overlapped);
-    if (!result && GetLastError() != ERROR_IO_PENDING) {
-      err = GetLastError();
-      CloseHandle(ipc_header_req->u.io.overlapped.hEvent);
+  req->write_buffer = uv_null_buf_;
+
+  if (nbufs == 0) {
+    /* Write empty buffer. */
+    write_buf = uv_null_buf_;
+  } else if (nbufs == 1 && !copy_always) {
+    /* Write directly from bufs[0]. */
+    write_buf = bufs[0];
+  } else {
+    /* Coalesce all `bufs` into one big buffer. This also creates a new
+     * write-request structure that replaces the old one. */
+    err = uv__build_coalesced_write_req(req, bufs, nbufs, &req, &write_buf);
+    if (err != 0)
       return err;
-    }
-
-    if (!result) {
-      /* Request not completed immediately. Wait for it.*/
-      if (WaitForSingleObject(ipc_header_req->u.io.overlapped.hEvent, INFINITE) !=
-          WAIT_OBJECT_0) {
-        err = GetLastError();
-        CloseHandle(ipc_header_req->u.io.overlapped.hEvent);
-        return err;
-      }
-    }
-    ipc_header_req->u.io.queued_bytes = 0;
-    CloseHandle(ipc_header_req->u.io.overlapped.hEvent);
-    ipc_header_req->u.io.overlapped.hEvent = NULL;
-
-    REGISTER_HANDLE_REQ(loop, handle, ipc_header_req);
-    handle->reqs_pending++;
-    handle->stream.conn.write_reqs_pending++;
-
-    /* If we don't have any raw data to write - we're done. */
-    if (!(ipc_frame.header.flags & UV_IPC_RAW_DATA)) {
-      return 0;
-    }
   }
 
   if ((handle->flags &
       (UV_HANDLE_BLOCKING_WRITES | UV_HANDLE_NON_OVERLAPPED_PIPE)) ==
       (UV_HANDLE_BLOCKING_WRITES | UV_HANDLE_NON_OVERLAPPED_PIPE)) {
     DWORD bytes;
-    result = WriteFile(handle->handle,
-                       bufs[0].base,
-                       bufs[0].len,
-                       &bytes,
-                       NULL);
+    result =
+        WriteFile(handle->handle, write_buf.base, write_buf.len, &bytes, NULL);
 
     if (!result) {
       err = GetLastError();
@@ -1382,14 +1346,14 @@ static int uv_pipe_write_impl(uv_loop_t* loop,
     POST_COMPLETION_FOR_REQ(loop, req);
     return 0;
   } else if (handle->flags & UV_HANDLE_NON_OVERLAPPED_PIPE) {
-    req->write_buffer = bufs[0];
+    req->write_buffer = write_buf;
     uv_insert_non_overlapped_write_req(handle, req);
     if (handle->stream.conn.write_reqs_pending == 0) {
       uv_queue_non_overlapped_write(handle);
     }
 
     /* Request queued by the kernel. */
-    req->u.io.queued_bytes = bufs[0].len;
+    req->u.io.queued_bytes = write_buf.len;
     handle->write_queue_size += req->u.io.queued_bytes;
   } else if (handle->flags & UV_HANDLE_BLOCKING_WRITES) {
     /* Using overlapped IO, but wait for completion before returning */
@@ -1399,8 +1363,8 @@ static int uv_pipe_write_impl(uv_loop_t* loop,
     }
 
     result = WriteFile(handle->handle,
-                       bufs[0].base,
-                       bufs[0].len,
+                       write_buf.base,
+                       write_buf.len,
                        NULL,
                        &req->u.io.overlapped);
 
@@ -1415,13 +1379,13 @@ static int uv_pipe_write_impl(uv_loop_t* loop,
       req->u.io.queued_bytes = 0;
     } else {
       /* Request queued by the kernel. */
-      req->u.io.queued_bytes = bufs[0].len;
+      req->u.io.queued_bytes = write_buf.len;
       handle->write_queue_size += req->u.io.queued_bytes;
       if (WaitForSingleObject(req->u.io.overlapped.hEvent, INFINITE) !=
           WAIT_OBJECT_0) {
         err = GetLastError();
         CloseHandle(req->u.io.overlapped.hEvent);
-        return uv_translate_sys_error(err);
+        return err;
       }
     }
     CloseHandle(req->u.io.overlapped.hEvent);
@@ -1432,8 +1396,8 @@ static int uv_pipe_write_impl(uv_loop_t* loop,
     return 0;
   } else {
     result = WriteFile(handle->handle,
-                       bufs[0].base,
-                       bufs[0].len,
+                       write_buf.base,
+                       write_buf.len,
                        NULL,
                        &req->u.io.overlapped);
 
@@ -1446,7 +1410,7 @@ static int uv_pipe_write_impl(uv_loop_t* loop,
       req->u.io.queued_bytes = 0;
     } else {
       /* Request queued by the kernel. */
-      req->u.io.queued_bytes = bufs[0].len;
+      req->u.io.queued_bytes = write_buf.len;
       handle->write_queue_size += req->u.io.queued_bytes;
     }
 
@@ -1471,35 +1435,140 @@ static int uv_pipe_write_impl(uv_loop_t* loop,
 }
 
 
-int uv_pipe_write(uv_loop_t* loop,
-                  uv_write_t* req,
-                  uv_pipe_t* handle,
-                  const uv_buf_t bufs[],
-                  unsigned int nbufs,
-                  uv_write_cb cb) {
-  return uv_pipe_write_impl(loop, req, handle, bufs, nbufs, NULL, cb);
+static DWORD uv__pipe_get_ipc_remote_pid(uv_pipe_t* handle) {
+  DWORD* pid = &handle->pipe.conn.ipc_remote_pid;
+
+  /* If the both ends of the IPC pipe are owned by the same process,
+   * the remote end pid may not yet be set. If so, do it here.
+   * TODO: this is weird; it'd probably better to use a handshake. */
+  if (*pid == 0)
+    *pid = GetCurrentProcessId();
+
+  return *pid;
+}
+
+
+int uv__pipe_write_ipc(uv_loop_t* loop,
+                       uv_write_t* req,
+                       uv_pipe_t* handle,
+                       const uv_buf_t data_bufs[],
+                       size_t data_buf_count,
+                       uv_stream_t* send_handle,
+                       uv_write_cb cb) {
+  uv_buf_t stack_bufs[6];
+  uv_buf_t* bufs;
+  size_t buf_count, buf_index;
+  uv__ipc_frame_header_t xfer_frame_header;
+  uv__ipc_socket_xfer_info_t xfer_info;
+  uv__ipc_frame_header_t data_frame_header;
+  size_t data_length;
+  size_t i;
+  int err;
+
+  /* Compute the combined size of data buffers. */
+  data_length = 0;
+  for (i = 0; i < data_buf_count; i++)
+    data_length += data_bufs[i].len;
+  if (data_length > UINT32_MAX)
+    return WSAENOBUFS; /* Maps to UV_ENOBUFS. */
+
+  /* Prepare xfer frame payload. */
+  if (send_handle) {
+    uv_tcp_t* send_tcp_handle = (uv_tcp_t*) send_handle;
+
+    /* Verify that `send_handle` it is indeed a tcp handle. */
+    if (send_tcp_handle->type != UV_TCP)
+      return ERROR_NOT_SUPPORTED;
+
+    /* Export the tcp handle. */
+    err = uv__tcp_xfer_export(
+        send_tcp_handle, uv__pipe_get_ipc_remote_pid(handle), &xfer_info);
+    if (err != 0)
+      return err;
+  }
+
+  /* Compute the number of uv_buf_t's required. */
+  buf_count = 0;
+  if (send_handle != NULL) {
+    buf_count += 2; /* One for the frame header, one for the payload. */
+  }
+  if (data_buf_count > 0) {
+    buf_count += 1 + data_buf_count; /* One extra for the frame header. */
+  }
+
+  /* Use the on-stack buffer array if it is big enough; otherwise allocate
+   * space for it on the heap. */
+  if (buf_count < ARRAY_SIZE(stack_bufs)) {
+    /* Use on-stack buffer array. */
+    bufs = stack_bufs;
+  } else {
+    /* Use heap-allocated buffer array. */
+    bufs = uv__calloc(buf_count, sizeof(uv_buf_t));
+    if (bufs == NULL)
+      return ERROR_NOT_ENOUGH_MEMORY; /* Maps to UV_ENOMEM. */
+  }
+  buf_index = 0;
+
+  if (send_handle != NULL) {
+    /* Add xfer frame header. */
+    xfer_frame_header.type = UV__IPC_XFER_FRAME;
+    xfer_frame_header.payload_length = sizeof xfer_info;
+    bufs[buf_index++] =
+        uv_buf_init((char*) &xfer_frame_header, sizeof xfer_frame_header);
+
+    /* Add xfer frame payload. */
+    bufs[buf_index++] = uv_buf_init((char*) &xfer_info, sizeof xfer_info);
+  }
+
+  if (data_length > 0) {
+    /* Add data frame header. */
+    data_frame_header.type = UV__IPC_DATA_FRAME;
+    data_frame_header.payload_length = (uint32_t) data_length;
+    bufs[buf_index++] =
+        uv_buf_init((char*) &data_frame_header, sizeof data_frame_header);
+
+    /* Add data buffers. */
+    for (i = 0; i < data_buf_count; i++)
+      bufs[buf_index++] = data_bufs[i];
+  }
+
+  /* Write buffers. We set the `always_copy` flag, so it is not a problem that
+   * some of the written data lives on the stack. */
+  err = uv__pipe_write_data(
+      loop, req, handle, bufs, buf_count, send_handle, cb, 1);
+
+  /* If we had to heap-allocate the bufs array, free it now. */
+  if (bufs != stack_bufs) {
+    uv__free(bufs);
+  }
+
+  return err;
 }
 
 
-int uv_pipe_write2(uv_loop_t* loop,
+int uv__pipe_write(uv_loop_t* loop,
                    uv_write_t* req,
                    uv_pipe_t* handle,
                    const uv_buf_t bufs[],
-                   unsigned int nbufs,
+                   size_t nbufs,
                    uv_stream_t* send_handle,
                    uv_write_cb cb) {
-  if (!handle->ipc) {
-    return WSAEINVAL;
+  if (handle->ipc) {
+    /* IPC pipe write: use framing protocol. */
+    return uv__pipe_write_ipc(loop, req, handle, bufs, nbufs, send_handle, cb);
+  } else {
+    /* Non-IPC pipe write: put data on the wire directly. */
+    assert(send_handle == NULL);
+    return uv__pipe_write_data(
+        loop, req, handle, bufs, nbufs, NULL, cb, 0);
   }
-
-  return uv_pipe_write_impl(loop, req, handle, bufs, nbufs, send_handle, cb);
 }
 
 
 static void uv_pipe_read_eof(uv_loop_t* loop, uv_pipe_t* handle,
     uv_buf_t buf) {
-  /* If there is an eof timer running, we don't need it any more, */
-  /* so discard it. */
+  /* If there is an eof timer running, we don't need it any more, so discard
+   * it. */
   eof_timer_destroy(handle);
 
   handle->flags &= ~UV_HANDLE_READABLE;
@@ -1511,8 +1580,8 @@ static void uv_pipe_read_eof(uv_loop_t* loop, uv_pipe_t* handle,
 
 static void uv_pipe_read_error(uv_loop_t* loop, uv_pipe_t* handle, int error,
     uv_buf_t buf) {
-  /* If there is an eof timer running, we don't need it any more, */
-  /* so discard it. */
+  /* If there is an eof timer running, we don't need it any more, so discard
+   * it. */
   eof_timer_destroy(handle);
 
   uv_read_stop((uv_stream_t*) handle);
@@ -1523,10 +1592,7 @@ static void uv_pipe_read_error(uv_loop_t* loop, uv_pipe_t* handle, int error,
 
 static void uv_pipe_read_error_or_eof(uv_loop_t* loop, uv_pipe_t* handle,
     int error, uv_buf_t buf) {
-  if (error == ERROR_OPERATION_ABORTED) {
-    /* do nothing (equivalent to EINTR) */
-  }
-  else if (error == ERROR_BROKEN_PIPE) {
+  if (error == ERROR_BROKEN_PIPE) {
     uv_pipe_read_eof(loop, handle, buf);
   } else {
     uv_pipe_read_error(loop, handle, error, buf);
@@ -1534,152 +1600,198 @@ static void uv_pipe_read_error_or_eof(uv_loop_t* loop, uv_pipe_t* handle,
 }
 
 
-void uv__pipe_insert_pending_socket(uv_pipe_t* handle,
-                                    uv__ipc_socket_info_ex* info,
-                                    int tcp_connection) {
-  uv__ipc_queue_item_t* item;
+static void uv__pipe_queue_ipc_xfer_info(
+    uv_pipe_t* handle, uv__ipc_socket_xfer_info_t* xfer_info) {
+  uv__ipc_xfer_queue_item_t* item;
 
-  item = (uv__ipc_queue_item_t*) uv__malloc(sizeof(*item));
+  item = (uv__ipc_xfer_queue_item_t*) uv__malloc(sizeof(*item));
   if (item == NULL)
     uv_fatal_error(ERROR_OUTOFMEMORY, "uv__malloc");
 
-  memcpy(&item->socket_info_ex, info, sizeof(item->socket_info_ex));
-  item->tcp_connection = tcp_connection;
-  QUEUE_INSERT_TAIL(&handle->pipe.conn.pending_ipc_info.queue, &item->member);
-  handle->pipe.conn.pending_ipc_info.queue_len++;
+  memcpy(&item->xfer_info, xfer_info, sizeof(item->xfer_info));
+  QUEUE_INSERT_TAIL(&handle->pipe.conn.ipc_xfer_queue, &item->member);
+  handle->pipe.conn.ipc_xfer_queue_length++;
 }
 
 
-void uv_process_pipe_read_req(uv_loop_t* loop, uv_pipe_t* handle,
-    uv_req_t* req) {
-  DWORD bytes, avail;
+/* Read an exact number of bytes from a pipe. If an error or end-of-file is
+ * encountered before the requested number of bytes are read, an error is
+ * returned. */
+static int uv__pipe_read_exactly(HANDLE h, void* buffer, DWORD count) {
+  DWORD bytes_read, bytes_read_now;
+
+  bytes_read = 0;
+  while (bytes_read < count) {
+    if (!ReadFile(h,
+                  (char*) buffer + bytes_read,
+                  count - bytes_read,
+                  &bytes_read_now,
+                  NULL)) {
+      return GetLastError();
+    }
+
+    bytes_read += bytes_read_now;
+  }
+
+  assert(bytes_read == count);
+  return 0;
+}
+
+
+static DWORD uv__pipe_read_data(uv_loop_t* loop,
+                                uv_pipe_t* handle,
+                                DWORD suggested_bytes,
+                                DWORD max_bytes) {
+  DWORD bytes_read;
   uv_buf_t buf;
-  uv_ipc_frame_uv_stream ipc_frame;
 
+  /* Ask the user for a buffer to read data into. */
+  buf = uv_buf_init(NULL, 0);
+  handle->alloc_cb((uv_handle_t*) handle, suggested_bytes, &buf);
+  if (buf.base == NULL || buf.len == 0) {
+    handle->read_cb((uv_stream_t*) handle, UV_ENOBUFS, &buf);
+    return 0; /* Break out of read loop. */
+  }
+
+  /* Ensure we read at most the smaller of:
+   *   (a) the length of the user-allocated buffer.
+   *   (b) the maximum data length as specified by the `max_bytes` argument.
+   */
+  if (max_bytes > buf.len)
+    max_bytes = buf.len;
+
+  /* Read into the user buffer. */
+  if (!ReadFile(handle->handle, buf.base, max_bytes, &bytes_read, NULL)) {
+    uv_pipe_read_error_or_eof(loop, handle, GetLastError(), buf);
+    return 0; /* Break out of read loop. */
+  }
+
+  /* Call the read callback. */
+  handle->read_cb((uv_stream_t*) handle, bytes_read, &buf);
+
+  return bytes_read;
+}
+
+
+static DWORD uv__pipe_read_ipc(uv_loop_t* loop, uv_pipe_t* handle) {
+  uint32_t* data_remaining = &handle->pipe.conn.ipc_data_frame.payload_remaining;
+  int err;
+
+  if (*data_remaining > 0) {
+    /* Read data frame payload. */
+    DWORD bytes_read =
+        uv__pipe_read_data(loop, handle, *data_remaining, *data_remaining);
+    *data_remaining -= bytes_read;
+    return bytes_read;
+
+  } else {
+    /* Start of a new IPC frame. */
+    uv__ipc_frame_header_t frame_header;
+    uv__ipc_socket_xfer_info_t xfer_info;
+
+    /* Read the IPC frame header. */
+    err = uv__pipe_read_exactly(
+        handle->handle, &frame_header, sizeof frame_header);
+    if (err)
+      goto error;
+
+    if (frame_header.type == UV__IPC_DATA_FRAME) {
+      /* Data frame: capture payload length. Actual data will be read in
+       * subsequent call to uv__pipe_read_ipc(). */
+      *data_remaining = frame_header.payload_length;
+
+      /* Return number of bytes read. */
+      return sizeof frame_header;
+
+    } else if (frame_header.type == UV__IPC_XFER_FRAME) {
+      /* Xfer frame: read the payload. */
+      assert(frame_header.payload_length == sizeof xfer_info);
+      err =
+          uv__pipe_read_exactly(handle->handle, &xfer_info, sizeof xfer_info);
+      if (err)
+        goto error;
+
+      /* Store the pending socket info. */
+      uv__pipe_queue_ipc_xfer_info(handle, &xfer_info);
+
+      /* Return number of bytes read. */
+      return sizeof frame_header + sizeof xfer_info;
+    }
+
+    /* Invalid frame. */
+    err = WSAECONNABORTED; /* Maps to UV_ECONNABORTED. */
+  }
+
+error:
+  uv_pipe_read_error_or_eof(loop, handle, err, uv_null_buf_);
+  return 0; /* Break out of read loop. */
+}
+
+
+void uv_process_pipe_read_req(uv_loop_t* loop,
+                              uv_pipe_t* handle,
+                              uv_req_t* req) {
   assert(handle->type == UV_NAMED_PIPE);
 
-  handle->flags &= ~UV_HANDLE_READ_PENDING;
+  handle->flags &= ~(UV_HANDLE_READ_PENDING | UV_HANDLE_CANCELLATION_PENDING);
+  DECREASE_PENDING_REQ_COUNT(handle);
   eof_timer_stop(handle);
 
-  if (!REQ_SUCCESS(req)) {
-    /* An error occurred doing the 0-read. */
-    if (handle->flags & UV_HANDLE_READING) {
-      uv_pipe_read_error_or_eof(loop,
-                                handle,
-                                GET_REQ_ERROR(req),
-                                uv_null_buf_);
-    }
-  } else {
-    /* Do non-blocking reads until the buffer is empty */
-    while (handle->flags & UV_HANDLE_READING) {
-      if (!PeekNamedPipe(handle->handle,
-                          NULL,
-                          0,
-                          NULL,
-                          &avail,
-                          NULL)) {
-        uv_pipe_read_error_or_eof(loop, handle, GetLastError(), uv_null_buf_);
-        break;
-      }
+  /* At this point, we're done with bookkeeping. If the user has stopped
+   * reading the pipe in the meantime, there is nothing left to do, since there
+   * is no callback that we can call. */
+  if (!(handle->flags & UV_HANDLE_READING))
+    return;
 
-      if (avail == 0) {
-        /* There is nothing to read after all. */
-        break;
-      }
+  if (!REQ_SUCCESS(req)) {
+    /* An error occurred doing the zero-read. */
+    DWORD err = GET_REQ_ERROR(req);
 
-      if (handle->ipc) {
-        /* Use the IPC framing protocol to read the incoming data. */
-        if (handle->pipe.conn.remaining_ipc_rawdata_bytes == 0) {
-          /* We're reading a new frame.  First, read the header. */
-          assert(avail >= sizeof(ipc_frame.header));
-
-          if (!ReadFile(handle->handle,
-                        &ipc_frame.header,
-                        sizeof(ipc_frame.header),
-                        &bytes,
-                        NULL)) {
-            uv_pipe_read_error_or_eof(loop, handle, GetLastError(),
-              uv_null_buf_);
-            break;
-          }
-
-          assert(bytes == sizeof(ipc_frame.header));
-          assert(ipc_frame.header.flags <= (UV_IPC_TCP_SERVER | UV_IPC_RAW_DATA |
-            UV_IPC_TCP_CONNECTION));
-
-          if (ipc_frame.header.flags & UV_IPC_TCP_SERVER) {
-            assert(avail - sizeof(ipc_frame.header) >=
-              sizeof(ipc_frame.socket_info_ex));
-
-            /* Read the TCP socket info. */
-            if (!ReadFile(handle->handle,
-                          &ipc_frame.socket_info_ex,
-                          sizeof(ipc_frame) - sizeof(ipc_frame.header),
-                          &bytes,
-                          NULL)) {
-              uv_pipe_read_error_or_eof(loop, handle, GetLastError(),
-                uv_null_buf_);
-              break;
-            }
-
-            assert(bytes == sizeof(ipc_frame) - sizeof(ipc_frame.header));
-
-            /* Store the pending socket info. */
-            uv__pipe_insert_pending_socket(
-                handle,
-                &ipc_frame.socket_info_ex,
-                ipc_frame.header.flags & UV_IPC_TCP_CONNECTION);
-          }
-
-          if (ipc_frame.header.flags & UV_IPC_RAW_DATA) {
-            handle->pipe.conn.remaining_ipc_rawdata_bytes =
-              ipc_frame.header.raw_data_length;
-            continue;
-          }
-        } else {
-          avail = min(avail, (DWORD)handle->pipe.conn.remaining_ipc_rawdata_bytes);
-        }
-      }
+    /* If the read was cancelled by uv__pipe_interrupt_read(), the request may
+     * indicate an ERROR_OPERATION_ABORTED error. This error isn't relevant to
+     * the user; we'll start a new zero-read at the end of this function. */
+    if (err != ERROR_OPERATION_ABORTED)
+      uv_pipe_read_error_or_eof(loop, handle, err, uv_null_buf_);
 
-      buf = uv_buf_init(NULL, 0);
-      handle->alloc_cb((uv_handle_t*) handle, avail, &buf);
-      if (buf.base == NULL || buf.len == 0) {
-        handle->read_cb((uv_stream_t*) handle, UV_ENOBUFS, &buf);
+  } else {
+    /* The zero-read completed without error, indicating there is data
+     * available in the kernel buffer. */
+    DWORD avail;
+
+    /* Get the number of bytes available. */
+    avail = 0;
+    if (!PeekNamedPipe(handle->handle, NULL, 0, NULL, &avail, NULL))
+      uv_pipe_read_error_or_eof(loop, handle, GetLastError(), uv_null_buf_);
+
+    /* Read until we've either read all the bytes available, or the 'reading'
+     * flag is cleared. */
+    while (avail > 0 && handle->flags & UV_HANDLE_READING) {
+      /* Depending on the type of pipe, read either IPC frames or raw data. */
+      DWORD bytes_read =
+          handle->ipc ? uv__pipe_read_ipc(loop, handle)
+                      : uv__pipe_read_data(loop, handle, avail, (DWORD) -1);
+
+      /* If no bytes were read, treat this as an indication that an error
+       * occurred, and break out of the read loop. */
+      if (bytes_read == 0)
         break;
-      }
-      assert(buf.base != NULL);
-
-      if (ReadFile(handle->handle,
-                   buf.base,
-                   min(buf.len, avail),
-                   &bytes,
-                   NULL)) {
-        /* Successful read */
-        if (handle->ipc) {
-          assert(handle->pipe.conn.remaining_ipc_rawdata_bytes >= bytes);
-          handle->pipe.conn.remaining_ipc_rawdata_bytes =
-            handle->pipe.conn.remaining_ipc_rawdata_bytes - bytes;
-        }
-        handle->read_cb((uv_stream_t*)handle, bytes, &buf);
 
-        /* Read again only if bytes == buf.len */
-        if (bytes <= buf.len) {
-          break;
-        }
-      } else {
-        uv_pipe_read_error_or_eof(loop, handle, GetLastError(), buf);
+      /* It is possible that more bytes were read than we thought were
+       * available. To prevent `avail` from underflowing, break out of the loop
+       * if this is the case. */
+      if (bytes_read > avail)
         break;
-      }
-    }
 
-    /* Post another 0-read if still reading and not closing. */
-    if ((handle->flags & UV_HANDLE_READING) &&
-        !(handle->flags & UV_HANDLE_READ_PENDING)) {
-      uv_pipe_queue_read(loop, handle);
+      /* Recompute the number of bytes available. */
+      avail -= bytes_read;
     }
   }
 
-  DECREASE_PENDING_REQ_COUNT(handle);
+  /* Start another zero-read request if necessary. */
+  if ((handle->flags & UV_HANDLE_READING) &&
+      !(handle->flags & UV_HANDLE_READ_PENDING)) {
+    uv_pipe_queue_read(loop, handle);
+  }
 }
 
 
@@ -1705,17 +1817,19 @@ void uv_process_pipe_write_req(uv_loop_t* loop, uv_pipe_t* handle,
     }
   }
 
-  if (req->ipc_header) {
-    if (req == &handle->pipe.conn.ipc_header_write_req) {
-      req->type = UV_UNKNOWN_REQ;
-    } else {
-      uv__free(req);
-    }
-  } else {
-    if (req->cb) {
-      err = GET_REQ_ERROR(req);
-      req->cb(req, uv_translate_sys_error(err));
-    }
+  err = GET_REQ_ERROR(req);
+
+  /* If this was a coalesced write, extract pointer to the user_provided
+   * uv_write_t structure so we can pass the expected pointer to the callback,
+   * then free the heap-allocated write req. */
+  if (req->coalesced) {
+    uv__coalesced_write_t* coalesced_write =
+        container_of(req, uv__coalesced_write_t, req);
+    req = coalesced_write->user_req;
+    uv__free(coalesced_write);
+  }
+  if (req->cb) {
+    req->cb(req, uv_translate_sys_error(err));
   }
 
   handle->stream.conn.write_reqs_pending--;
@@ -1741,7 +1855,7 @@ void uv_process_pipe_accept_req(uv_loop_t* loop, uv_pipe_t* handle,
 
   assert(handle->type == UV_NAMED_PIPE);
 
-  if (handle->flags & UV__HANDLE_CLOSING) {
+  if (handle->flags & UV_HANDLE_CLOSING) {
     /* The req->pipeHandle should be freed already in uv_pipe_cleanup(). */
     assert(req->pipeHandle == INVALID_HANDLE_VALUE);
     DECREASE_PENDING_REQ_COUNT(handle);
@@ -1761,7 +1875,7 @@ void uv_process_pipe_accept_req(uv_loop_t* loop, uv_pipe_t* handle,
       CloseHandle(req->pipeHandle);
       req->pipeHandle = INVALID_HANDLE_VALUE;
     }
-    if (!(handle->flags & UV__HANDLE_CLOSING)) {
+    if (!(handle->flags & UV_HANDLE_CLOSING)) {
       uv_pipe_queue_accept(loop, handle, req, FALSE);
     }
   }
@@ -1799,19 +1913,19 @@ void uv_process_pipe_shutdown_req(uv_loop_t* loop, uv_pipe_t* handle,
   UNREGISTER_HANDLE_REQ(loop, handle, req);
 
   if (handle->flags & UV_HANDLE_READABLE) {
-    /* Initialize and optionally start the eof timer. Only do this if the */
-    /* pipe is readable and we haven't seen EOF come in ourselves. */
+    /* Initialize and optionally start the eof timer. Only do this if the pipe
+     * is readable and we haven't seen EOF come in ourselves. */
     eof_timer_init(handle);
 
-    /* If reading start the timer right now. */
-    /* Otherwise uv_pipe_queue_read will start it. */
+    /* If reading start the timer right now. Otherwise uv_pipe_queue_read will
+     * start it. */
     if (handle->flags & UV_HANDLE_READ_PENDING) {
       eof_timer_start(handle);
     }
 
   } else {
-    /* This pipe is not readable. We can just close it to let the other end */
-    /* know that we're done writing. */
+    /* This pipe is not readable. We can just close it to let the other end
+     * know that we're done writing. */
     close_pipe(handle);
   }
 
@@ -1862,17 +1976,16 @@ static void eof_timer_cb(uv_timer_t* timer) {
 
   assert(pipe->type == UV_NAMED_PIPE);
 
-  /* This should always be true, since we start the timer only */
-  /* in uv_pipe_queue_read after successfully calling ReadFile, */
-  /* or in uv_process_pipe_shutdown_req if a read is pending, */
-  /* and we always immediately stop the timer in */
-  /* uv_process_pipe_read_req. */
+  /* This should always be true, since we start the timer only in
+   * uv_pipe_queue_read after successfully calling ReadFile, or in
+   * uv_process_pipe_shutdown_req if a read is pending, and we always
+   * immediately stop the timer in uv_process_pipe_read_req. */
   assert(pipe->flags & UV_HANDLE_READ_PENDING);
 
-  /* If there are many packets coming off the iocp then the timer callback */
-  /* may be called before the read request is coming off the queue. */
-  /* Therefore we check here if the read request has completed but will */
-  /* be processed later. */
+  /* If there are many packets coming off the iocp then the timer callback may
+   * be called before the read request is coming off the queue. Therefore we
+   * check here if the read request has completed but will be processed later.
+   */
   if ((pipe->flags & UV_HANDLE_READ_PENDING) &&
       HasOverlappedIoCompleted(&pipe->read_req.u.io.overlapped)) {
     return;
@@ -1881,12 +1994,12 @@ static void eof_timer_cb(uv_timer_t* timer) {
   /* Force both ends off the pipe. */
   close_pipe(pipe);
 
-  /* Stop reading, so the pending read that is going to fail will */
-  /* not be reported to the user. */
+  /* Stop reading, so the pending read that is going to fail will not be
+   * reported to the user. */
   uv_read_stop((uv_stream_t*) pipe);
 
-  /* Report the eof and update flags. This will get reported even if the */
-  /* user stopped reading in the meantime. TODO: is that okay? */
+  /* Report the eof and update flags. This will get reported even if the user
+   * stopped reading in the meantime. TODO: is that okay? */
   uv_pipe_read_eof(loop, pipe, uv_null_buf_);
 }
 
@@ -1973,8 +2086,8 @@ int uv_pipe_open(uv_pipe_t* pipe, uv_file file) {
 
   if (pipe->ipc) {
     assert(!(pipe->flags & UV_HANDLE_NON_OVERLAPPED_PIPE));
-    pipe->pipe.conn.ipc_pid = uv_os_getppid();
-    assert(pipe->pipe.conn.ipc_pid != -1);
+    pipe->pipe.conn.ipc_remote_pid = uv_os_getppid();
+    assert(pipe->pipe.conn.ipc_remote_pid != -1);
   }
   return 0;
 }
@@ -1999,7 +2112,15 @@ static int uv__pipe_getname(const uv_pipe_t* handle, char* buffer, size_t* size)
     return UV_EINVAL;
   }
 
-  uv__pipe_pause_read((uv_pipe_t*)handle); /* cast away const warning */
+  /* NtQueryInformationFile will block if another thread is performing a
+   * blocking operation on the queried handle. If the pipe handle is
+   * synchronous, there may be a worker thread currently calling ReadFile() on
+   * the pipe handle, which could cause a deadlock. To avoid this, interrupt
+   * the read. */
+  if (handle->flags & UV_HANDLE_CONNECTION &&
+      handle->flags & UV_HANDLE_NON_OVERLAPPED_PIPE) {
+    uv__pipe_interrupt_read((uv_pipe_t*) handle); /* cast away const warning */
+  }
 
   nt_status = pNtQueryInformationFile(handle->handle,
                                       &io_status,
@@ -2090,7 +2211,6 @@ static int uv__pipe_getname(const uv_pipe_t* handle, char* buffer, size_t* size)
   uv__free(name_info);
 
 cleanup:
-  uv__pipe_unpause_read((uv_pipe_t*)handle); /* cast away const warning */
   return err;
 }
 
@@ -2098,7 +2218,7 @@ static int uv__pipe_getname(const uv_pipe_t* handle, char* buffer, size_t* size)
 int uv_pipe_pending_count(uv_pipe_t* handle) {
   if (!handle->ipc)
     return 0;
-  return handle->pipe.conn.pending_ipc_info.queue_len;
+  return handle->pipe.conn.ipc_xfer_queue_length;
 }
 
 
@@ -2131,7 +2251,7 @@ int uv_pipe_getpeername(const uv_pipe_t* handle, char* buffer, size_t* size) {
 uv_handle_type uv_pipe_pending_type(uv_pipe_t* handle) {
   if (!handle->ipc)
     return UV_UNKNOWN_HANDLE;
-  if (handle->pipe.conn.pending_ipc_info.queue_len == 0)
+  if (handle->pipe.conn.ipc_xfer_queue_length == 0)
     return UV_UNKNOWN_HANDLE;
   else
     return UV_TCP;
diff --git a/deps/libuv/src/win/poll.c b/deps/libuv/src/win/poll.c
index a648ba711..77eb071c8 100644
--- a/deps/libuv/src/win/poll.c
+++ b/deps/libuv/src/win/poll.c
@@ -91,16 +91,16 @@ static void uv__fast_poll_submit_poll_req(uv_loop_t* loop, uv_poll_t* handle) {
     handle->mask_events_1 = handle->events;
     handle->mask_events_2 = 0;
   } else {
-    /* Just wait until there's an unsubmitted req. */
-    /* This will happen almost immediately as one of the 2 outstanding */
-    /* requests is about to return. When this happens, */
-    /* uv__fast_poll_process_poll_req will be called, and the pending */
-    /* events, if needed, will be processed in a subsequent request. */
+    /* Just wait until there's an unsubmitted req. This will happen almost
+     * immediately as one of the 2 outstanding requests is about to return.
+     * When this happens, uv__fast_poll_process_poll_req will be called, and
+     * the pending events, if needed, will be processed in a subsequent
+     * request. */
     return;
   }
 
-  /* Setting Exclusive to TRUE makes the other poll request return if there */
-  /* is any. */
+  /* Setting Exclusive to TRUE makes the other poll request return if there is
+   * any. */
   afd_poll_info->Exclusive = TRUE;
   afd_poll_info->NumberOfHandles = 1;
   afd_poll_info->Timeout.QuadPart = INT64_MAX;
@@ -218,7 +218,7 @@ static void uv__fast_poll_process_poll_req(uv_loop_t* loop, uv_poll_t* handle,
   if ((handle->events & ~(handle->submitted_events_1 |
       handle->submitted_events_2)) != 0) {
     uv__fast_poll_submit_poll_req(loop, handle);
-  } else if ((handle->flags & UV__HANDLE_CLOSING) &&
+  } else if ((handle->flags & UV_HANDLE_CLOSING) &&
              handle->submitted_events_1 == 0 &&
              handle->submitted_events_2 == 0) {
     uv_want_endgame(loop, (uv_handle_t*) handle);
@@ -228,7 +228,7 @@ static void uv__fast_poll_process_poll_req(uv_loop_t* loop, uv_poll_t* handle,
 
 static int uv__fast_poll_set(uv_loop_t* loop, uv_poll_t* handle, int events) {
   assert(handle->type == UV_POLL);
-  assert(!(handle->flags & UV__HANDLE_CLOSING));
+  assert(!(handle->flags & UV_HANDLE_CLOSING));
   assert((events & ~(UV_READABLE | UV_WRITABLE | UV_DISCONNECT)) == 0);
 
   handle->events = events;
@@ -257,8 +257,8 @@ static int uv__fast_poll_close(uv_loop_t* loop, uv_poll_t* handle) {
     uv_want_endgame(loop, (uv_handle_t*) handle);
     return 0;
   } else {
-    /* Cancel outstanding poll requests by executing another, unique poll */
-    /* request that forces the outstanding ones to return. */
+    /* Cancel outstanding poll requests by executing another, unique poll
+     * request that forces the outstanding ones to return. */
     return uv__fast_poll_cancel_poll_req(loop, handle);
   }
 }
@@ -316,9 +316,8 @@ static SOCKET uv__fast_poll_get_peer_socket(uv_loop_t* loop,
     return INVALID_SOCKET;
   }
 
-  /* If we didn't (try) to create a peer socket yet, try to make one. Don't */
-  /* try again if the peer socket creation failed earlier for the same */
-  /* protocol. */
+  /* If we didn't (try) to create a peer socket yet, try to make one. Don't try
+   * again if the peer socket creation failed earlier for the same protocol. */
   peer_socket = loop->poll_peer_sockets[index];
   if (peer_socket == 0) {
     peer_socket = uv__fast_poll_create_peer_socket(loop->iocp, protocol_info);
@@ -357,8 +356,8 @@ static DWORD WINAPI uv__slow_poll_thread_proc(void* arg) {
     efds.fd_count = 0;
   }
 
-  /* Make the select() time out after 3 minutes. If select() hangs because */
-  /* the user closed the socket, we will at least not hang indefinitely. */
+  /* Make the select() time out after 3 minutes. If select() hangs because the
+   * user closed the socket, we will at least not hang indefinitely. */
   timeout.tv_sec = 3 * 60;
   timeout.tv_usec = 0;
 
@@ -462,7 +461,7 @@ static void uv__slow_poll_process_poll_req(uv_loop_t* loop, uv_poll_t* handle,
   if ((handle->events & ~(handle->submitted_events_1 |
       handle->submitted_events_2)) != 0) {
     uv__slow_poll_submit_poll_req(loop, handle);
-  } else if ((handle->flags & UV__HANDLE_CLOSING) &&
+  } else if ((handle->flags & UV_HANDLE_CLOSING) &&
              handle->submitted_events_1 == 0 &&
              handle->submitted_events_2 == 0) {
     uv_want_endgame(loop, (uv_handle_t*) handle);
@@ -472,7 +471,7 @@ static void uv__slow_poll_process_poll_req(uv_loop_t* loop, uv_poll_t* handle,
 
 static int uv__slow_poll_set(uv_loop_t* loop, uv_poll_t* handle, int events) {
   assert(handle->type == UV_POLL);
-  assert(!(handle->flags & UV__HANDLE_CLOSING));
+  assert(!(handle->flags & UV_HANDLE_CLOSING));
   assert((events & ~(UV_READABLE | UV_WRITABLE)) == 0);
 
   handle->events = events;
@@ -522,10 +521,10 @@ int uv_poll_init_socket(uv_loop_t* loop, uv_poll_t* handle,
   if (ioctlsocket(socket, FIONBIO, &yes) == SOCKET_ERROR)
     return uv_translate_sys_error(WSAGetLastError());
 
-  /* Try to obtain a base handle for the socket. This increases this chances */
-  /* that we find an AFD handle and are able to use the fast poll mechanism. */
-  /* This will always fail on windows XP/2k3, since they don't support the */
-  /* SIO_BASE_HANDLE ioctl. */
+/* Try to obtain a base handle for the socket. This increases this chances that
+ * we find an AFD handle and are able to use the fast poll mechanism. This will
+ * always fail on windows XP/2k3, since they don't support the. SIO_BASE_HANDLE
+ * ioctl. */
 #ifndef NDEBUG
   base_socket = INVALID_SOCKET;
 #endif
@@ -557,9 +556,9 @@ int uv_poll_init_socket(uv_loop_t* loop, uv_poll_t* handle,
     return uv_translate_sys_error(WSAGetLastError());
   }
 
-  /* Get the peer socket that is needed to enable fast poll. If the returned */
-  /* value is NULL, the protocol is not implemented by MSAFD and we'll have */
-  /* to use slow mode. */
+  /* Get the peer socket that is needed to enable fast poll. If the returned
+   * value is NULL, the protocol is not implemented by MSAFD and we'll have to
+   * use slow mode. */
   peer_socket = uv__fast_poll_get_peer_socket(loop, &protocol_info);
 
   if (peer_socket != INVALID_SOCKET) {
@@ -634,7 +633,7 @@ int uv_poll_close(uv_loop_t* loop, uv_poll_t* handle) {
 
 
 void uv_poll_endgame(uv_loop_t* loop, uv_poll_t* handle) {
-  assert(handle->flags & UV__HANDLE_CLOSING);
+  assert(handle->flags & UV_HANDLE_CLOSING);
   assert(!(handle->flags & UV_HANDLE_CLOSED));
 
   assert(handle->submitted_events_1 == 0);
diff --git a/deps/libuv/src/win/process-stdio.c b/deps/libuv/src/win/process-stdio.c
index 032e30935..355d61880 100644
--- a/deps/libuv/src/win/process-stdio.c
+++ b/deps/libuv/src/win/process-stdio.c
@@ -103,12 +103,12 @@ static int uv__create_stdio_pipe_pair(uv_loop_t* loop,
   DWORD client_access = 0;
   HANDLE child_pipe = INVALID_HANDLE_VALUE;
   int err;
+  int overlap;
 
   if (flags & UV_READABLE_PIPE) {
-    /* The server needs inbound access too, otherwise CreateNamedPipe() */
-    /* won't give us the FILE_READ_ATTRIBUTES permission. We need that to */
-    /* probe the state of the write buffer when we're trying to shutdown */
-    /* the pipe. */
+    /* The server needs inbound access too, otherwise CreateNamedPipe() won't
+     * give us the FILE_READ_ATTRIBUTES permission. We need that to probe the
+     * state of the write buffer when we're trying to shutdown the pipe. */
     server_access |= PIPE_ACCESS_OUTBOUND | PIPE_ACCESS_INBOUND;
     client_access |= GENERIC_READ | FILE_WRITE_ATTRIBUTES;
   }
@@ -131,12 +131,13 @@ static int uv__create_stdio_pipe_pair(uv_loop_t* loop,
   sa.lpSecurityDescriptor = NULL;
   sa.bInheritHandle = TRUE;
 
+  overlap = server_pipe->ipc || (flags & UV_OVERLAPPED_PIPE);
   child_pipe = CreateFileA(pipe_name,
                            client_access,
                            0,
                            &sa,
                            OPEN_EXISTING,
-                           server_pipe->ipc ? FILE_FLAG_OVERLAPPED : 0,
+                           overlap ? FILE_FLAG_OVERLAPPED : 0,
                            NULL);
   if (child_pipe == INVALID_HANDLE_VALUE) {
     err = GetLastError();
@@ -159,8 +160,8 @@ static int uv__create_stdio_pipe_pair(uv_loop_t* loop,
   }
 #endif
 
-  /* Do a blocking ConnectNamedPipe.  This should not block because we have */
-  /* both ends of the pipe created. */
+  /* Do a blocking ConnectNamedPipe. This should not block because we have both
+   * ends of the pipe created. */
   if (!ConnectNamedPipe(server_pipe->handle, NULL)) {
     if (GetLastError() != ERROR_PIPE_CONNECTED) {
       err = GetLastError();
@@ -194,11 +195,11 @@ static int uv__duplicate_handle(uv_loop_t* loop, HANDLE handle, HANDLE* dup) {
   HANDLE current_process;
 
 
-  /* _get_osfhandle will sometimes return -2 in case of an error. This seems */
-  /* to happen when fd <= 2 and the process' corresponding stdio handle is */
-  /* set to NULL. Unfortunately DuplicateHandle will happily duplicate */
-  /* (HANDLE) -2, so this situation goes unnoticed until someone tries to */
-  /* use the duplicate. Therefore we filter out known-invalid handles here. */
+  /* _get_osfhandle will sometimes return -2 in case of an error. This seems to
+   * happen when fd <= 2 and the process' corresponding stdio handle is set to
+   * NULL. Unfortunately DuplicateHandle will happily duplicate (HANDLE) -2, so
+   * this situation goes unnoticed until someone tries to use the duplicate.
+   * Therefore we filter out known-invalid handles here. */
   if (handle == INVALID_HANDLE_VALUE ||
       handle == NULL ||
       handle == (HANDLE) -2) {
@@ -284,8 +285,8 @@ int uv__stdio_create(uv_loop_t* loop,
     return ERROR_OUTOFMEMORY;
   }
 
-  /* Prepopulate the buffer with INVALID_HANDLE_VALUE handles so we can */
-  /* clean up on failure. */
+  /* Prepopulate the buffer with INVALID_HANDLE_VALUE handles so we can clean
+   * up on failure. */
   CHILD_STDIO_COUNT(buffer) = count;
   for (i = 0; i < count; i++) {
     CHILD_STDIO_CRT_FLAGS(buffer, i) = 0;
@@ -303,12 +304,12 @@ int uv__stdio_create(uv_loop_t* loop,
     switch (fdopt.flags & (UV_IGNORE | UV_CREATE_PIPE | UV_INHERIT_FD |
             UV_INHERIT_STREAM)) {
       case UV_IGNORE:
-        /* Starting a process with no stdin/stout/stderr can confuse it. */
-        /* So no matter what the user specified, we make sure the first */
-        /* three FDs are always open in their typical modes, e.g. stdin */
-        /* be readable and stdout/err should be writable. For FDs > 2, don't */
-        /* do anything - all handles in the stdio buffer are initialized with */
-        /* INVALID_HANDLE_VALUE, which should be okay. */
+        /* Starting a process with no stdin/stout/stderr can confuse it. So no
+         * matter what the user specified, we make sure the first three FDs are
+         * always open in their typical modes, e. g. stdin be readable and
+         * stdout/err should be writable. For FDs > 2, don't do anything - all
+         * handles in the stdio buffer are initialized with.
+         * INVALID_HANDLE_VALUE, which should be okay. */
         if (i <= 2) {
           DWORD access = (i == 0) ? FILE_GENERIC_READ :
                                     FILE_GENERIC_WRITE | FILE_READ_ATTRIBUTES;
@@ -323,14 +324,14 @@ int uv__stdio_create(uv_loop_t* loop,
         break;
 
       case UV_CREATE_PIPE: {
-        /* Create a pair of two connected pipe ends; one end is turned into */
-        /* an uv_pipe_t for use by the parent. The other one is given to */
-        /* the child. */
+        /* Create a pair of two connected pipe ends; one end is turned into an
+         * uv_pipe_t for use by the parent. The other one is given to the
+         * child. */
         uv_pipe_t* parent_pipe = (uv_pipe_t*) fdopt.data.stream;
         HANDLE child_pipe = INVALID_HANDLE_VALUE;
 
-        /* Create a new, connected pipe pair. stdio[i].stream should point */
-        /* to an uninitialized, but not connected pipe handle. */
+        /* Create a new, connected pipe pair. stdio[i]. stream should point to
+         * an uninitialized, but not connected pipe handle. */
         assert(fdopt.data.stream->type == UV_NAMED_PIPE);
         assert(!(fdopt.data.stream->flags & UV_HANDLE_CONNECTION));
         assert(!(fdopt.data.stream->flags & UV_HANDLE_PIPESERVER));
@@ -354,8 +355,8 @@ int uv__stdio_create(uv_loop_t* loop,
         /* Make an inheritable duplicate of the handle. */
         err = uv__duplicate_fd(loop, fdopt.data.fd, &child_handle);
         if (err) {
-          /* If fdopt.data.fd is not valid and fd fd <= 2, then ignore the */
-          /* error. */
+          /* If fdopt. data. fd is not valid and fd <= 2, then ignore the
+           * error. */
           if (fdopt.data.fd <= 2 && err == ERROR_INVALID_HANDLE) {
             CHILD_STDIO_CRT_FLAGS(buffer, i) = 0;
             CHILD_STDIO_HANDLE(buffer, i) = INVALID_HANDLE_VALUE;
@@ -418,8 +419,8 @@ int uv__stdio_create(uv_loop_t* loop,
 
         if (stream_handle == NULL ||
             stream_handle == INVALID_HANDLE_VALUE) {
-          /* The handle is already closed, or not yet created, or the */
-          /* stream type is not supported. */
+          /* The handle is already closed, or not yet created, or the stream
+           * type is not supported. */
           err = ERROR_NOT_SUPPORTED;
           goto error;
         }
diff --git a/deps/libuv/src/win/process.c b/deps/libuv/src/win/process.c
index 752352221..b47f203e9 100644
--- a/deps/libuv/src/win/process.c
+++ b/deps/libuv/src/win/process.c
@@ -360,8 +360,8 @@ static WCHAR* search_path(const WCHAR *file,
     return NULL;
   }
 
-  /* Find the start of the filename so we can split the directory from the */
-  /* name. */
+  /* Find the start of the filename so we can split the directory from the
+   * name. */
   for (file_name_start = (WCHAR*)file + file_len;
        file_name_start > file
            && file_name_start[-1] != L'\\'
@@ -556,8 +556,8 @@ int make_program_args(char** args, int verbatim_arguments, WCHAR** dst_ptr) {
     arg_count++;
   }
 
-  /* Adjust for potential quotes. Also assume the worst-case scenario */
-  /* that every character needs escaping, so we need twice as much space. */
+  /* Adjust for potential quotes. Also assume the worst-case scenario that
+   * every character needs escaping, so we need twice as much space. */
   dst_len = dst_len * 2 + arg_count * 2;
 
   /* Allocate buffer for the final command line. */
@@ -831,8 +831,13 @@ int make_program_env(char* env_block[], WCHAR** dst_ptr) {
  */
 static WCHAR* find_path(WCHAR *env) {
   for (; env != NULL && *env != 0; env += wcslen(env) + 1) {
-    if (wcsncmp(env, L"PATH=", 5) == 0)
+    if ((env[0] == L'P' || env[0] == L'p') &&
+        (env[1] == L'A' || env[1] == L'a') &&
+        (env[2] == L'T' || env[2] == L't') &&
+        (env[3] == L'H' || env[3] == L'h') &&
+        (env[4] == L'=')) {
       return &env[5];
+    }
   }
 
   return NULL;
@@ -865,9 +870,9 @@ void uv_process_proc_exit(uv_loop_t* loop, uv_process_t* handle) {
   assert(handle->exit_cb_pending);
   handle->exit_cb_pending = 0;
 
-  /* If we're closing, don't call the exit callback. Just schedule a close */
-  /* callback now. */
-  if (handle->flags & UV__HANDLE_CLOSING) {
+  /* If we're closing, don't call the exit callback. Just schedule a close
+   * callback now. */
+  if (handle->flags & UV_HANDLE_CLOSING) {
     uv_want_endgame(loop, (uv_handle_t*) handle);
     return;
   }
@@ -878,14 +883,14 @@ void uv_process_proc_exit(uv_loop_t* loop, uv_process_t* handle) {
     handle->wait_handle = INVALID_HANDLE_VALUE;
   }
 
-  /* Set the handle to inactive: no callbacks will be made after the exit */
-  /* callback.*/
+  /* Set the handle to inactive: no callbacks will be made after the exit
+   * callback. */
   uv__handle_stop(handle);
 
   if (GetExitCodeProcess(handle->process_handle, &status)) {
     exit_code = status;
   } else {
-    /* Unable to to obtain the exit code. This should never happen. */
+    /* Unable to obtain the exit code. This should never happen. */
     exit_code = uv_translate_sys_error(GetLastError());
   }
 
@@ -900,8 +905,8 @@ void uv_process_close(uv_loop_t* loop, uv_process_t* handle) {
   uv__handle_closing(handle);
 
   if (handle->wait_handle != INVALID_HANDLE_VALUE) {
-    /* This blocks until either the wait was cancelled, or the callback has */
-    /* completed. */
+    /* This blocks until either the wait was cancelled, or the callback has
+     * completed. */
     BOOL r = UnregisterWaitEx(handle->wait_handle, INVALID_HANDLE_VALUE);
     if (!r) {
       /* This should never happen, and if it happens, we can't recover... */
@@ -919,7 +924,7 @@ void uv_process_close(uv_loop_t* loop, uv_process_t* handle) {
 
 void uv_process_endgame(uv_loop_t* loop, uv_process_t* handle) {
   assert(!handle->exit_cb_pending);
-  assert(handle->flags & UV__HANDLE_CLOSING);
+  assert(handle->flags & UV_HANDLE_CLOSING);
   assert(!(handle->flags & UV_HANDLE_CLOSED));
 
   /* Clean-up the process handle. */
@@ -1104,14 +1109,13 @@ int uv_spawn(uv_loop_t* loop,
     goto done;
   }
 
-  /* Spawn succeeded */
-  /* Beyond this point, failure is reported asynchronously. */
+  /* Spawn succeeded. Beyond this point, failure is reported asynchronously. */
 
   process->process_handle = info.hProcess;
   process->pid = info.dwProcessId;
 
-  /* If the process isn't spawned as detached, assign to the global job */
-  /* object so windows will kill it when the parent process dies. */
+  /* If the process isn't spawned as detached, assign to the global job object
+   * so windows will kill it when the parent process dies. */
   if (!(options->flags & UV_PROCESS_DETACHED)) {
     uv_once(&uv_global_job_handle_init_guard_, uv__init_global_job_handle);
 
@@ -1138,7 +1142,8 @@ int uv_spawn(uv_loop_t* loop,
     if (fdopt->flags & UV_CREATE_PIPE &&
         fdopt->data.stream->type == UV_NAMED_PIPE &&
         ((uv_pipe_t*) fdopt->data.stream)->ipc) {
-      ((uv_pipe_t*) fdopt->data.stream)->pipe.conn.ipc_pid = info.dwProcessId;
+      ((uv_pipe_t*) fdopt->data.stream)->pipe.conn.ipc_remote_pid =
+          info.dwProcessId;
     }
   }
 
@@ -1154,8 +1159,8 @@ int uv_spawn(uv_loop_t* loop,
 
   assert(!err);
 
-  /* Make the handle active. It will remain active until the exit callback */
-  /* is made or the handle is closed, whichever happens first. */
+  /* Make the handle active. It will remain active until the exit callback is
+   * made or the handle is closed, whichever happens first. */
   uv__handle_start(process);
 
   /* Cleanup, whether we succeeded or failed. */
@@ -1186,16 +1191,16 @@ static int uv__kill(HANDLE process_handle, int signum) {
     case SIGTERM:
     case SIGKILL:
     case SIGINT: {
-      /* Unconditionally terminate the process. On Windows, killed processes */
-      /* normally return 1. */
+      /* Unconditionally terminate the process. On Windows, killed processes
+       * normally return 1. */
       DWORD status;
       int err;
 
       if (TerminateProcess(process_handle, 1))
         return 0;
 
-      /* If the process already exited before TerminateProcess was called, */
-      /* TerminateProcess will fail with ERROR_ACCESS_DENIED. */
+      /* If the process already exited before TerminateProcess was called,.
+       * TerminateProcess will fail with ERROR_ACCESS_DENIED. */
       err = GetLastError();
       if (err == ERROR_ACCESS_DENIED &&
           GetExitCodeProcess(process_handle, &status) &&
diff --git a/deps/libuv/src/win/signal.c b/deps/libuv/src/win/signal.c
index a174da1f7..3d0b8a35b 100644
--- a/deps/libuv/src/win/signal.c
+++ b/deps/libuv/src/win/signal.c
@@ -47,13 +47,13 @@ void uv_signals_init(void) {
 
 
 static int uv__signal_compare(uv_signal_t* w1, uv_signal_t* w2) {
-  /* Compare signums first so all watchers with the same signnum end up */
-  /* adjacent. */
+  /* Compare signums first so all watchers with the same signnum end up
+   * adjacent. */
   if (w1->signum < w2->signum) return -1;
   if (w1->signum > w2->signum) return 1;
 
-  /* Sort by loop pointer, so we can easily look up the first item after */
-  /* { .signum = x, .loop = NULL } */
+  /* Sort by loop pointer, so we can easily look up the first item after
+   * { .signum = x, .loop = NULL }. */
   if ((uintptr_t) w1->loop < (uintptr_t) w2->loop) return -1;
   if ((uintptr_t) w1->loop > (uintptr_t) w2->loop) return 1;
 
@@ -90,7 +90,7 @@ int uv__signal_dispatch(int signum) {
     unsigned long previous = InterlockedExchange(
             (volatile LONG*) &handle->pending_signum, signum);
 
-    if (handle->flags & UV__SIGNAL_ONE_SHOT_DISPATCHED)
+    if (handle->flags & UV_SIGNAL_ONE_SHOT_DISPATCHED)
       continue;
 
     if (!previous) {
@@ -98,8 +98,8 @@ int uv__signal_dispatch(int signum) {
     }
 
     dispatched = 1;
-    if (handle->flags & UV__SIGNAL_ONE_SHOT)
-      handle->flags |= UV__SIGNAL_ONE_SHOT_DISPATCHED;
+    if (handle->flags & UV_SIGNAL_ONE_SHOT)
+      handle->flags |= UV_SIGNAL_ONE_SHOT_DISPATCHED;
   }
 
   LeaveCriticalSection(&uv__signal_lock);
@@ -118,10 +118,10 @@ static BOOL WINAPI uv__signal_control_handler(DWORD type) {
 
     case CTRL_CLOSE_EVENT:
       if (uv__signal_dispatch(SIGHUP)) {
-        /* Windows will terminate the process after the control handler */
-        /* returns. After that it will just terminate our process. Therefore */
-        /* block the signal handler so the main loop has some time to pick */
-        /* up the signal and do something for a few seconds. */
+        /* Windows will terminate the process after the control handler
+         * returns. After that it will just terminate our process. Therefore
+         * block the signal handler so the main loop has some time to pick up
+         * the signal and do something for a few seconds. */
         Sleep(INFINITE);
         return TRUE;
       }
@@ -129,8 +129,8 @@ static BOOL WINAPI uv__signal_control_handler(DWORD type) {
 
     case CTRL_LOGOFF_EVENT:
     case CTRL_SHUTDOWN_EVENT:
-      /* These signals are only sent to services. Services have their own */
-      /* notification mechanism, so there's no point in handling these. */
+      /* These signals are only sent to services. Services have their own
+       * notification mechanism, so there's no point in handling these. */
 
     default:
       /* We don't handle these. */
@@ -193,10 +193,10 @@ int uv__signal_start(uv_signal_t* handle,
   if (signum != SIGWINCH && (signum <= 0 || signum >= NSIG))
     return UV_EINVAL;
 
-  /* Short circuit: if the signal watcher is already watching {signum} don't */
-  /* go through the process of deregistering and registering the handler. */
-  /* Additionally, this avoids pending signals getting lost in the (small) */
-  /* time frame that handle->signum == 0. */
+  /* Short circuit: if the signal watcher is already watching {signum} don't go
+   * through the process of deregistering and registering the handler.
+   * Additionally, this avoids pending signals getting lost in the (small) time
+   * frame that handle->signum == 0. */
   if (signum == handle->signum) {
     handle->signal_cb = signal_cb;
     return 0;
@@ -213,7 +213,7 @@ int uv__signal_start(uv_signal_t* handle,
 
   handle->signum = signum;
   if (oneshot)
-    handle->flags |= UV__SIGNAL_ONE_SHOT;
+    handle->flags |= UV_SIGNAL_ONE_SHOT;
 
   RB_INSERT(uv_signal_tree_s, &uv__signal_tree, handle);
 
@@ -237,16 +237,16 @@ void uv_process_signal_req(uv_loop_t* loop, uv_signal_t* handle,
           (volatile LONG*) &handle->pending_signum, 0);
   assert(dispatched_signum != 0);
 
-  /* Check if the pending signal equals the signum that we are watching for. */
-  /* These can get out of sync when the handler is stopped and restarted */
-  /* while the signal_req is pending. */
+  /* Check if the pending signal equals the signum that we are watching for.
+   * These can get out of sync when the handler is stopped and restarted while
+   * the signal_req is pending. */
   if (dispatched_signum == handle->signum)
     handle->signal_cb(handle, dispatched_signum);
 
-  if (handle->flags & UV__SIGNAL_ONE_SHOT)
+  if (handle->flags & UV_SIGNAL_ONE_SHOT)
     uv_signal_stop(handle);
 
-  if (handle->flags & UV__HANDLE_CLOSING) {
+  if (handle->flags & UV_HANDLE_CLOSING) {
     /* When it is closing, it must be stopped at this point. */
     assert(handle->signum == 0);
     uv_want_endgame(loop, (uv_handle_t*) handle);
@@ -265,7 +265,7 @@ void uv_signal_close(uv_loop_t* loop, uv_signal_t* handle) {
 
 
 void uv_signal_endgame(uv_loop_t* loop, uv_signal_t* handle) {
-  assert(handle->flags & UV__HANDLE_CLOSING);
+  assert(handle->flags & UV_HANDLE_CLOSING);
   assert(!(handle->flags & UV_HANDLE_CLOSED));
 
   assert(handle->signum == 0);
diff --git a/deps/libuv/src/win/stream.c b/deps/libuv/src/win/stream.c
index 13cbfdcb9..7656627e9 100644
--- a/deps/libuv/src/win/stream.c
+++ b/deps/libuv/src/win/stream.c
@@ -105,12 +105,10 @@ int uv_read_stop(uv_stream_t* handle) {
   err = 0;
   if (handle->type == UV_TTY) {
     err = uv_tty_read_stop((uv_tty_t*) handle);
+  } else if (handle->type == UV_NAMED_PIPE) {
+    uv__pipe_read_stop((uv_pipe_t*) handle);
   } else {
-    if (handle->type == UV_NAMED_PIPE) {
-      uv__pipe_stop_read((uv_pipe_t*) handle);
-    } else {
-      handle->flags &= ~UV_HANDLE_READING;
-    }
+    handle->flags &= ~UV_HANDLE_READING;
     DECREASE_ACTIVE_COUNT(handle->loop, handle);
   }
 
@@ -136,7 +134,8 @@ int uv_write(uv_write_t* req,
       err = uv_tcp_write(loop, req, (uv_tcp_t*) handle, bufs, nbufs, cb);
       break;
     case UV_NAMED_PIPE:
-      err = uv_pipe_write(loop, req, (uv_pipe_t*) handle, bufs, nbufs, cb);
+      err = uv__pipe_write(
+          loop, req, (uv_pipe_t*) handle, bufs, nbufs, NULL, cb);
       break;
     case UV_TTY:
       err = uv_tty_write(loop, req, (uv_tty_t*) handle, bufs, nbufs, cb);
@@ -158,25 +157,18 @@ int uv_write2(uv_write_t* req,
   uv_loop_t* loop = handle->loop;
   int err;
 
-  if (!(handle->flags & UV_HANDLE_WRITABLE)) {
-    return UV_EPIPE;
+  if (send_handle == NULL) {
+    return uv_write(req, handle, bufs, nbufs, cb);
   }
 
-  err = ERROR_INVALID_PARAMETER;
-  switch (handle->type) {
-    case UV_NAMED_PIPE:
-      err = uv_pipe_write2(loop,
-                           req,
-                           (uv_pipe_t*) handle,
-                           bufs,
-                           nbufs,
-                           send_handle,
-                           cb);
-      break;
-    default:
-      assert(0);
+  if (handle->type != UV_NAMED_PIPE || !((uv_pipe_t*) handle)->ipc) {
+    return UV_EINVAL;
+  } else if (!(handle->flags & UV_HANDLE_WRITABLE)) {
+    return UV_EPIPE;
   }
 
+  err = uv__pipe_write(
+      loop, req, (uv_pipe_t*) handle, bufs, nbufs, send_handle, cb);
   return uv_translate_sys_error(err);
 }
 
@@ -184,7 +176,7 @@ int uv_write2(uv_write_t* req,
 int uv_try_write(uv_stream_t* stream,
                  const uv_buf_t bufs[],
                  unsigned int nbufs) {
-  if (stream->flags & UV__HANDLE_CLOSING)
+  if (stream->flags & UV_HANDLE_CLOSING)
     return UV_EBADF;
   if (!(stream->flags & UV_HANDLE_WRITABLE))
     return UV_EPIPE;
diff --git a/deps/libuv/src/win/tcp.c b/deps/libuv/src/win/tcp.c
index 39c1ff056..a97ab2a51 100644
--- a/deps/libuv/src/win/tcp.c
+++ b/deps/libuv/src/win/tcp.c
@@ -99,8 +99,8 @@ static int uv_tcp_set_socket(uv_loop_t* loop,
   if (!SetHandleInformation((HANDLE) socket, HANDLE_FLAG_INHERIT, 0))
     return GetLastError();
 
-  /* Associate it with the I/O completion port. */
-  /* Use uv_handle_t pointer as completion key. */
+  /* Associate it with the I/O completion port. Use uv_handle_t pointer as
+   * completion key. */
   if (CreateIoCompletionPort((HANDLE)socket,
                              loop->iocp,
                              (ULONG_PTR)socket,
@@ -118,15 +118,12 @@ static int uv_tcp_set_socket(uv_loop_t* loop,
     non_ifs_lsp = uv_tcp_non_ifs_lsp_ipv4;
   }
 
-  if (pSetFileCompletionNotificationModes &&
-      !(handle->flags & UV_HANDLE_EMULATE_IOCP) && !non_ifs_lsp) {
-    if (pSetFileCompletionNotificationModes((HANDLE) socket,
-        FILE_SKIP_SET_EVENT_ON_HANDLE |
-        FILE_SKIP_COMPLETION_PORT_ON_SUCCESS)) {
-      handle->flags |= UV_HANDLE_SYNC_BYPASS_IOCP;
-    } else if (GetLastError() != ERROR_INVALID_FUNCTION) {
+  if (!(handle->flags & UV_HANDLE_EMULATE_IOCP) && !non_ifs_lsp) {
+    UCHAR sfcnm_flags =
+        FILE_SKIP_SET_EVENT_ON_HANDLE | FILE_SKIP_COMPLETION_PORT_ON_SUCCESS;
+    if (!SetFileCompletionNotificationModes((HANDLE) socket, sfcnm_flags))
       return GetLastError();
-    }
+    handle->flags |= UV_HANDLE_SYNC_BYPASS_IOCP;
   }
 
   if (handle->flags & UV_HANDLE_TCP_NODELAY) {
@@ -220,7 +217,7 @@ void uv_tcp_endgame(uv_loop_t* loop, uv_tcp_t* handle) {
     UNREGISTER_HANDLE_REQ(loop, handle, handle->stream.conn.shutdown_req);
 
     err = 0;
-    if (handle->flags & UV__HANDLE_CLOSING) {
+    if (handle->flags & UV_HANDLE_CLOSING) {
       err = ERROR_OPERATION_ABORTED;
     } else if (shutdown(handle->socket, SD_SEND) == SOCKET_ERROR) {
       err = WSAGetLastError();
@@ -236,7 +233,7 @@ void uv_tcp_endgame(uv_loop_t* loop, uv_tcp_t* handle) {
     return;
   }
 
-  if (handle->flags & UV__HANDLE_CLOSING &&
+  if (handle->flags & UV_HANDLE_CLOSING &&
       handle->reqs_pending == 0) {
     assert(!(handle->flags & UV_HANDLE_CLOSED));
 
@@ -326,9 +323,9 @@ static int uv_tcp_try_bind(uv_tcp_t* handle,
 
     on = (flags & UV_TCP_IPV6ONLY) != 0;
 
-    /* TODO: how to handle errors? This may fail if there is no ipv4 stack */
-    /* available, or when run on XP/2003 which have no support for dualstack */
-    /* sockets. For now we're silently ignoring the error. */
+    /* TODO: how to handle errors? This may fail if there is no ipv4 stack
+     * available, or when run on XP/2003 which have no support for dualstack
+     * sockets. For now we're silently ignoring the error. */
     setsockopt(handle->socket,
                IPPROTO_IPV6,
                IPV6_V6ONLY,
@@ -626,9 +623,9 @@ int uv_tcp_listen(uv_tcp_t* handle, int backlog, uv_connection_cb cb) {
       uv_tcp_queue_accept(handle, req);
     }
 
-    /* Initialize other unused requests too, because uv_tcp_endgame */
-    /* doesn't know how how many requests were initialized, so it will */
-    /* try to clean up {uv_simultaneous_server_accepts} requests. */
+    /* Initialize other unused requests too, because uv_tcp_endgame doesn't
+     * know how many requests were initialized, so it will try to clean up
+     * {uv_simultaneous_server_accepts} requests. */
     for (i = simultaneous_accepts; i < uv_simultaneous_server_accepts; i++) {
       req = &handle->tcp.serv.accept_reqs[i];
       UV_REQ_INIT(req, UV_ACCEPT);
@@ -683,7 +680,7 @@ int uv_tcp_accept(uv_tcp_t* server, uv_tcp_t* client) {
   req->next_pending = NULL;
   req->accept_socket = INVALID_SOCKET;
 
-  if (!(server->flags & UV__HANDLE_CLOSING)) {
+  if (!(server->flags & UV_HANDLE_CLOSING)) {
     /* Check if we're in a middle of changing the number of pending accepts. */
     if (!(server->flags & UV_HANDLE_TCP_ACCEPT_STATE_CHANGING)) {
       uv_tcp_queue_accept(server, req);
@@ -721,8 +718,8 @@ int uv_tcp_read_start(uv_tcp_t* handle, uv_alloc_cb alloc_cb,
   handle->alloc_cb = alloc_cb;
   INCREASE_ACTIVE_COUNT(loop, handle);
 
-  /* If reading was stopped and then started again, there could still be a */
-  /* read request pending. */
+  /* If reading was stopped and then started again, there could still be a read
+   * request pending. */
   if (!(handle->flags & UV_HANDLE_READ_PENDING)) {
     if (handle->flags & UV_HANDLE_EMULATE_IOCP &&
         !handle->read_req.event_handle) {
@@ -965,8 +962,7 @@ void uv_process_tcp_read_req(uv_loop_t* loop, uv_tcp_t* handle,
       err = GET_REQ_SOCK_ERROR(req);
 
       if (err == WSAECONNABORTED) {
-        /*
-         * Turn WSAECONNABORTED into UV_ECONNRESET to be consistent with Unix.
+        /* Turn WSAECONNABORTED into UV_ECONNRESET to be consistent with Unix.
          */
         err = WSAECONNRESET;
       }
@@ -1046,8 +1042,8 @@ void uv_process_tcp_read_req(uv_loop_t* loop, uv_tcp_t* handle,
           DECREASE_ACTIVE_COUNT(loop, handle);
 
           if (err == WSAECONNABORTED) {
-            /* Turn WSAECONNABORTED into UV_ECONNRESET to be consistent with */
-            /* Unix. */
+            /* Turn WSAECONNABORTED into UV_ECONNRESET to be consistent with
+             * Unix. */
             err = WSAECONNRESET;
           }
 
@@ -1119,10 +1115,9 @@ void uv_process_tcp_accept_req(uv_loop_t* loop, uv_tcp_t* handle,
 
   assert(handle->type == UV_TCP);
 
-  /* If handle->accepted_socket is not a valid socket, then */
-  /* uv_queue_accept must have failed. This is a serious error. We stop */
-  /* accepting connections and report this error to the connection */
-  /* callback. */
+  /* If handle->accepted_socket is not a valid socket, then uv_queue_accept
+   * must have failed. This is a serious error. We stop accepting connections
+   * and report this error to the connection callback. */
   if (req->accept_socket == INVALID_SOCKET) {
     if (handle->flags & UV_HANDLE_LISTENING) {
       handle->flags &= ~UV_HANDLE_LISTENING;
@@ -1147,9 +1142,9 @@ void uv_process_tcp_accept_req(uv_loop_t* loop, uv_tcp_t* handle,
       handle->stream.serv.connection_cb((uv_stream_t*)handle, 0);
     }
   } else {
-    /* Error related to accepted socket is ignored because the server */
-    /* socket may still be healthy. If the server socket is broken */
-    /* uv_queue_accept will detect it. */
+    /* Error related to accepted socket is ignored because the server socket
+     * may still be healthy. If the server socket is broken uv_queue_accept
+     * will detect it. */
     closesocket(req->accept_socket);
     req->accept_socket = INVALID_SOCKET;
     if (handle->flags & UV_HANDLE_LISTENING) {
@@ -1171,7 +1166,7 @@ void uv_process_tcp_connect_req(uv_loop_t* loop, uv_tcp_t* handle,
 
   err = 0;
   if (REQ_SUCCESS(req)) {
-    if (handle->flags & UV__HANDLE_CLOSING) {
+    if (handle->flags & UV_HANDLE_CLOSING) {
       /* use UV_ECANCELED for consistency with Unix */
       err = ERROR_OPERATION_ABORTED;
     } else if (setsockopt(handle->socket,
@@ -1194,13 +1189,46 @@ void uv_process_tcp_connect_req(uv_loop_t* loop, uv_tcp_t* handle,
 }
 
 
-int uv_tcp_import(uv_tcp_t* tcp, uv__ipc_socket_info_ex* socket_info_ex,
-    int tcp_connection) {
+int uv__tcp_xfer_export(uv_tcp_t* handle,
+                        int target_pid,
+                        uv__ipc_socket_xfer_info_t* xfer_info) {
+  if (!(handle->flags & UV_HANDLE_CONNECTION)) {
+    /* We're about to share the socket with another process. Because this is a
+     * listening socket, we assume that the other process will be accepting
+     * connections on it. Thus, before sharing the socket with another process,
+     * we call listen here in the parent process. */
+    if (!(handle->flags & UV_HANDLE_LISTENING)) {
+      if (!(handle->flags & UV_HANDLE_BOUND)) {
+        return ERROR_NOT_SUPPORTED;
+      }
+      if (handle->delayed_error == 0 &&
+          listen(handle->socket, SOMAXCONN) == SOCKET_ERROR) {
+        handle->delayed_error = WSAGetLastError();
+      }
+    }
+  }
+
+  if (WSADuplicateSocketW(
+          handle->socket, target_pid, &xfer_info->socket_info)) {
+    return WSAGetLastError();
+  }
+  xfer_info->delayed_error = handle->delayed_error;
+  xfer_info->flags = handle->flags & UV_HANDLE_CONNECTION;
+
+  /* Mark the local copy of the handle as 'shared' so we behave in a way that's
+   * friendly to the process(es) that we share the socket with. */
+  handle->flags |= UV_HANDLE_SHARED_TCP_SOCKET;
+
+  return 0;
+}
+
+
+int uv__tcp_xfer_import(uv_tcp_t* tcp, uv__ipc_socket_xfer_info_t* xfer_info) {
   int err;
   SOCKET socket = WSASocketW(FROM_PROTOCOL_INFO,
                              FROM_PROTOCOL_INFO,
                              FROM_PROTOCOL_INFO,
-                             &socket_info_ex->socket_info,
+                             &xfer_info->socket_info,
                              0,
                              WSA_FLAG_OVERLAPPED);
 
@@ -1208,26 +1236,21 @@ int uv_tcp_import(uv_tcp_t* tcp, uv__ipc_socket_info_ex* socket_info_ex,
     return WSAGetLastError();
   }
 
-  err = uv_tcp_set_socket(tcp->loop,
-                          tcp,
-                          socket,
-                          socket_info_ex->socket_info.iAddressFamily,
-                          1);
+  err = uv_tcp_set_socket(
+      tcp->loop, tcp, socket, xfer_info->socket_info.iAddressFamily, 1);
   if (err) {
     closesocket(socket);
     return err;
   }
 
-  if (tcp_connection) {
+  tcp->delayed_error = xfer_info->delayed_error;
+  tcp->flags |= UV_HANDLE_BOUND | UV_HANDLE_SHARED_TCP_SOCKET;
+
+  if (xfer_info->flags & UV_HANDLE_CONNECTION) {
     uv_connection_init((uv_stream_t*)tcp);
     tcp->flags |= UV_HANDLE_READABLE | UV_HANDLE_WRITABLE;
   }
 
-  tcp->flags |= UV_HANDLE_BOUND;
-  tcp->flags |= UV_HANDLE_SHARED_TCP_SOCKET;
-
-  tcp->delayed_error = socket_info_ex->delayed_error;
-
   tcp->loop->active_tcp_streams++;
   return 0;
 }
@@ -1273,39 +1296,6 @@ int uv_tcp_keepalive(uv_tcp_t* handle, int enable, unsigned int delay) {
 }
 
 
-int uv_tcp_duplicate_socket(uv_tcp_t* handle, int pid,
-    LPWSAPROTOCOL_INFOW protocol_info) {
-  if (!(handle->flags & UV_HANDLE_CONNECTION)) {
-    /*
-     * We're about to share the socket with another process.  Because
-     * this is a listening socket, we assume that the other process will
-     * be accepting connections on it.  So, before sharing the socket
-     * with another process, we call listen here in the parent process.
-     */
-
-    if (!(handle->flags & UV_HANDLE_LISTENING)) {
-      if (!(handle->flags & UV_HANDLE_BOUND)) {
-        return ERROR_INVALID_PARAMETER;
-      }
-
-      if (!(handle->delayed_error)) {
-        if (listen(handle->socket, SOMAXCONN) == SOCKET_ERROR) {
-          handle->delayed_error = WSAGetLastError();
-        }
-      }
-    }
-  }
-
-  if (WSADuplicateSocketW(handle->socket, pid, protocol_info)) {
-    return WSAGetLastError();
-  }
-
-  handle->flags |= UV_HANDLE_SHARED_TCP_SOCKET;
-
-  return 0;
-}
-
-
 int uv_tcp_simultaneous_accepts(uv_tcp_t* handle, int enable) {
   if (handle->flags & UV_HANDLE_CONNECTION) {
     return UV_EINVAL;
@@ -1346,8 +1336,8 @@ static int uv_tcp_try_cancel_io(uv_tcp_t* tcp) {
   non_ifs_lsp = (tcp->flags & UV_HANDLE_IPV6) ? uv_tcp_non_ifs_lsp_ipv6 :
                                                 uv_tcp_non_ifs_lsp_ipv4;
 
-  /* If there are non-ifs LSPs then try to obtain a base handle for the */
-  /* socket. This will always fail on Windows XP/3k. */
+  /* If there are non-ifs LSPs then try to obtain a base handle for the socket.
+   * This will always fail on Windows XP/3k. */
   if (non_ifs_lsp) {
     DWORD bytes;
     if (WSAIoctl(socket,
@@ -1379,38 +1369,37 @@ void uv_tcp_close(uv_loop_t* loop, uv_tcp_t* tcp) {
   int close_socket = 1;
 
   if (tcp->flags & UV_HANDLE_READ_PENDING) {
-    /* In order for winsock to do a graceful close there must not be any */
-    /* any pending reads, or the socket must be shut down for writing */
+    /* In order for winsock to do a graceful close there must not be any any
+     * pending reads, or the socket must be shut down for writing */
     if (!(tcp->flags & UV_HANDLE_SHARED_TCP_SOCKET)) {
       /* Just do shutdown on non-shared sockets, which ensures graceful close. */
       shutdown(tcp->socket, SD_SEND);
 
     } else if (uv_tcp_try_cancel_io(tcp) == 0) {
-      /* In case of a shared socket, we try to cancel all outstanding I/O, */
-      /* If that works, don't close the socket yet - wait for the read req to */
-      /* return and close the socket in uv_tcp_endgame. */
+      /* In case of a shared socket, we try to cancel all outstanding I/O,. If
+       * that works, don't close the socket yet - wait for the read req to
+       * return and close the socket in uv_tcp_endgame. */
       close_socket = 0;
 
     } else {
-      /* When cancelling isn't possible - which could happen when an LSP is */
-      /* present on an old Windows version, we will have to close the socket */
-      /* with a read pending. That is not nice because trailing sent bytes */
-      /* may not make it to the other side. */
+      /* When cancelling isn't possible - which could happen when an LSP is
+       * present on an old Windows version, we will have to close the socket
+       * with a read pending. That is not nice because trailing sent bytes may
+       * not make it to the other side. */
     }
 
   } else if ((tcp->flags & UV_HANDLE_SHARED_TCP_SOCKET) &&
              tcp->tcp.serv.accept_reqs != NULL) {
-    /* Under normal circumstances closesocket() will ensure that all pending */
-    /* accept reqs are canceled. However, when the socket is shared the */
-    /* presence of another reference to the socket in another process will */
-    /* keep the accept reqs going, so we have to ensure that these are */
-    /* canceled. */
+    /* Under normal circumstances closesocket() will ensure that all pending
+     * accept reqs are canceled. However, when the socket is shared the
+     * presence of another reference to the socket in another process will keep
+     * the accept reqs going, so we have to ensure that these are canceled. */
     if (uv_tcp_try_cancel_io(tcp) != 0) {
-      /* When cancellation is not possible, there is another option: we can */
-      /* close the incoming sockets, which will also cancel the accept */
-      /* operations. However this is not cool because we might inadvertently */
-      /* close a socket that just accepted a new connection, which will */
-      /* cause the connection to be aborted. */
+      /* When cancellation is not possible, there is another option: we can
+       * close the incoming sockets, which will also cancel the accept
+       * operations. However this is not cool because we might inadvertently
+       * close a socket that just accepted a new connection, which will cause
+       * the connection to be aborted. */
       unsigned int i;
       for (i = 0; i < uv_simultaneous_server_accepts; i++) {
         uv_tcp_accept_t* req = &tcp->tcp.serv.accept_reqs[i];
diff --git a/deps/libuv/src/win/thread.c b/deps/libuv/src/win/thread.c
index 9eaad77cd..6e41dcd8a 100644
--- a/deps/libuv/src/win/thread.c
+++ b/deps/libuv/src/win/thread.c
@@ -26,26 +26,6 @@
 #include "uv.h"
 #include "internal.h"
 
-
-#define HAVE_CONDVAR_API() (pInitializeConditionVariable != NULL)
-
-static int uv_cond_fallback_init(uv_cond_t* cond);
-static void uv_cond_fallback_destroy(uv_cond_t* cond);
-static void uv_cond_fallback_signal(uv_cond_t* cond);
-static void uv_cond_fallback_broadcast(uv_cond_t* cond);
-static void uv_cond_fallback_wait(uv_cond_t* cond, uv_mutex_t* mutex);
-static int uv_cond_fallback_timedwait(uv_cond_t* cond,
-    uv_mutex_t* mutex, uint64_t timeout);
-
-static int uv_cond_condvar_init(uv_cond_t* cond);
-static void uv_cond_condvar_destroy(uv_cond_t* cond);
-static void uv_cond_condvar_signal(uv_cond_t* cond);
-static void uv_cond_condvar_broadcast(uv_cond_t* cond);
-static void uv_cond_condvar_wait(uv_cond_t* cond, uv_mutex_t* mutex);
-static int uv_cond_condvar_timedwait(uv_cond_t* cond,
-    uv_mutex_t* mutex, uint64_t timeout);
-
-
 static void uv__once_inner(uv_once_t* guard, void (*callback)(void)) {
   DWORD result;
   HANDLE existing_event, created_event;
@@ -69,8 +49,8 @@ static void uv__once_inner(uv_once_t* guard, void (*callback)(void)) {
     guard->ran = 1;
 
   } else {
-    /* We lost the race. Destroy the event we created and wait for the */
-    /* existing one to become signaled. */
+    /* We lost the race. Destroy the event we created and wait for the existing
+     * one to become signaled. */
     CloseHandle(created_event);
     result = WaitForSingleObject(existing_event, INFINITE);
     assert(result == WAIT_OBJECT_0);
@@ -377,220 +357,35 @@ int uv_sem_trywait(uv_sem_t* sem) {
 }
 
 
-/* This condition variable implementation is based on the SetEvent solution
- * (section 3.2) at http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
- * We could not use the SignalObjectAndWait solution (section 3.4) because
- * it want the 2nd argument (type uv_mutex_t) of uv_cond_wait() and
- * uv_cond_timedwait() to be HANDLEs, but we use CRITICAL_SECTIONs.
- */
-
-static int uv_cond_fallback_init(uv_cond_t* cond) {
-  int err;
-
-  /* Initialize the count to 0. */
-  cond->fallback.waiters_count = 0;
-
-  InitializeCriticalSection(&cond->fallback.waiters_count_lock);
-
-  /* Create an auto-reset event. */
-  cond->fallback.signal_event = CreateEvent(NULL,  /* no security */
-                                            FALSE, /* auto-reset event */
-                                            FALSE, /* non-signaled initially */
-                                            NULL); /* unnamed */
-  if (!cond->fallback.signal_event) {
-    err = GetLastError();
-    goto error2;
-  }
-
-  /* Create a manual-reset event. */
-  cond->fallback.broadcast_event = CreateEvent(NULL,  /* no security */
-                                               TRUE,  /* manual-reset */
-                                               FALSE, /* non-signaled */
-                                               NULL); /* unnamed */
-  if (!cond->fallback.broadcast_event) {
-    err = GetLastError();
-    goto error;
-  }
-
-  return 0;
-
-error:
-  CloseHandle(cond->fallback.signal_event);
-error2:
-  DeleteCriticalSection(&cond->fallback.waiters_count_lock);
-  return uv_translate_sys_error(err);
-}
-
-
-static int uv_cond_condvar_init(uv_cond_t* cond) {
-  pInitializeConditionVariable(&cond->cond_var);
-  return 0;
-}
-
-
 int uv_cond_init(uv_cond_t* cond) {
-  uv__once_init();
-
-  if (HAVE_CONDVAR_API())
-    return uv_cond_condvar_init(cond);
-  else
-    return uv_cond_fallback_init(cond);
-}
-
-
-static void uv_cond_fallback_destroy(uv_cond_t* cond) {
-  if (!CloseHandle(cond->fallback.broadcast_event))
-    abort();
-  if (!CloseHandle(cond->fallback.signal_event))
-    abort();
-  DeleteCriticalSection(&cond->fallback.waiters_count_lock);
-}
-
-
-static void uv_cond_condvar_destroy(uv_cond_t* cond) {
-  /* nothing to do */
+  InitializeConditionVariable(&cond->cond_var);
+  return 0;
 }
 
 
 void uv_cond_destroy(uv_cond_t* cond) {
-  if (HAVE_CONDVAR_API())
-    uv_cond_condvar_destroy(cond);
-  else
-    uv_cond_fallback_destroy(cond);
-}
-
-
-static void uv_cond_fallback_signal(uv_cond_t* cond) {
-  int have_waiters;
-
-  /* Avoid race conditions. */
-  EnterCriticalSection(&cond->fallback.waiters_count_lock);
-  have_waiters = cond->fallback.waiters_count > 0;
-  LeaveCriticalSection(&cond->fallback.waiters_count_lock);
-
-  if (have_waiters)
-    SetEvent(cond->fallback.signal_event);
-}
-
-
-static void uv_cond_condvar_signal(uv_cond_t* cond) {
-  pWakeConditionVariable(&cond->cond_var);
+  /* nothing to do */
+  (void) &cond;
 }
 
 
 void uv_cond_signal(uv_cond_t* cond) {
-  if (HAVE_CONDVAR_API())
-    uv_cond_condvar_signal(cond);
-  else
-    uv_cond_fallback_signal(cond);
-}
-
-
-static void uv_cond_fallback_broadcast(uv_cond_t* cond) {
-  int have_waiters;
-
-  /* Avoid race conditions. */
-  EnterCriticalSection(&cond->fallback.waiters_count_lock);
-  have_waiters = cond->fallback.waiters_count > 0;
-  LeaveCriticalSection(&cond->fallback.waiters_count_lock);
-
-  if (have_waiters)
-    SetEvent(cond->fallback.broadcast_event);
-}
-
-
-static void uv_cond_condvar_broadcast(uv_cond_t* cond) {
-  pWakeAllConditionVariable(&cond->cond_var);
+  WakeConditionVariable(&cond->cond_var);
 }
 
 
 void uv_cond_broadcast(uv_cond_t* cond) {
-  if (HAVE_CONDVAR_API())
-    uv_cond_condvar_broadcast(cond);
-  else
-    uv_cond_fallback_broadcast(cond);
-}
-
-
-static int uv_cond_wait_helper(uv_cond_t* cond, uv_mutex_t* mutex,
-    DWORD dwMilliseconds) {
-  DWORD result;
-  int last_waiter;
-  HANDLE handles[2] = {
-    cond->fallback.signal_event,
-    cond->fallback.broadcast_event
-  };
-
-  /* Avoid race conditions. */
-  EnterCriticalSection(&cond->fallback.waiters_count_lock);
-  cond->fallback.waiters_count++;
-  LeaveCriticalSection(&cond->fallback.waiters_count_lock);
-
-  /* It's ok to release the <mutex> here since Win32 manual-reset events */
-  /* maintain state when used with <SetEvent>. This avoids the "lost wakeup" */
-  /* bug. */
-  uv_mutex_unlock(mutex);
-
-  /* Wait for either event to become signaled due to <uv_cond_signal> being */
-  /* called or <uv_cond_broadcast> being called. */
-  result = WaitForMultipleObjects(2, handles, FALSE, dwMilliseconds);
-
-  EnterCriticalSection(&cond->fallback.waiters_count_lock);
-  cond->fallback.waiters_count--;
-  last_waiter = result == WAIT_OBJECT_0 + 1
-      && cond->fallback.waiters_count == 0;
-  LeaveCriticalSection(&cond->fallback.waiters_count_lock);
-
-  /* Some thread called <pthread_cond_broadcast>. */
-  if (last_waiter) {
-    /* We're the last waiter to be notified or to stop waiting, so reset the */
-    /* the manual-reset event. */
-    ResetEvent(cond->fallback.broadcast_event);
-  }
-
-  /* Reacquire the <mutex>. */
-  uv_mutex_lock(mutex);
-
-  if (result == WAIT_OBJECT_0 || result == WAIT_OBJECT_0 + 1)
-    return 0;
-
-  if (result == WAIT_TIMEOUT)
-    return UV_ETIMEDOUT;
-
-  abort();
-  return -1; /* Satisfy the compiler. */
-}
-
-
-static void uv_cond_fallback_wait(uv_cond_t* cond, uv_mutex_t* mutex) {
-  if (uv_cond_wait_helper(cond, mutex, INFINITE))
-    abort();
-}
-
-
-static void uv_cond_condvar_wait(uv_cond_t* cond, uv_mutex_t* mutex) {
-  if (!pSleepConditionVariableCS(&cond->cond_var, mutex, INFINITE))
-    abort();
+  WakeAllConditionVariable(&cond->cond_var);
 }
 
 
 void uv_cond_wait(uv_cond_t* cond, uv_mutex_t* mutex) {
-  if (HAVE_CONDVAR_API())
-    uv_cond_condvar_wait(cond, mutex);
-  else
-    uv_cond_fallback_wait(cond, mutex);
-}
-
-
-static int uv_cond_fallback_timedwait(uv_cond_t* cond,
-    uv_mutex_t* mutex, uint64_t timeout) {
-  return uv_cond_wait_helper(cond, mutex, (DWORD)(timeout / 1e6));
+  if (!SleepConditionVariableCS(&cond->cond_var, mutex, INFINITE))
+    abort();
 }
 
-
-static int uv_cond_condvar_timedwait(uv_cond_t* cond,
-    uv_mutex_t* mutex, uint64_t timeout) {
-  if (pSleepConditionVariableCS(&cond->cond_var, mutex, (DWORD)(timeout / 1e6)))
+int uv_cond_timedwait(uv_cond_t* cond, uv_mutex_t* mutex, uint64_t timeout) {
+  if (SleepConditionVariableCS(&cond->cond_var, mutex, (DWORD)(timeout / 1e6)))
     return 0;
   if (GetLastError() != ERROR_TIMEOUT)
     abort();
@@ -598,15 +393,6 @@ static int uv_cond_condvar_timedwait(uv_cond_t* cond,
 }
 
 
-int uv_cond_timedwait(uv_cond_t* cond, uv_mutex_t* mutex,
-    uint64_t timeout) {
-  if (HAVE_CONDVAR_API())
-    return uv_cond_condvar_timedwait(cond, mutex, timeout);
-  else
-    return uv_cond_fallback_timedwait(cond, mutex, timeout);
-}
-
-
 int uv_barrier_init(uv_barrier_t* barrier, unsigned int count) {
   int err;
 
diff --git a/deps/libuv/src/win/timer.c b/deps/libuv/src/win/timer.c
deleted file mode 100644
index 7e006fedf..000000000
--- a/deps/libuv/src/win/timer.c
+++ /dev/null
@@ -1,195 +0,0 @@
-/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-#include <assert.h>
-#include <limits.h>
-
-#include "uv.h"
-#include "internal.h"
-#include "tree.h"
-#include "handle-inl.h"
-
-
-/* The number of milliseconds in one second. */
-#define UV__MILLISEC 1000
-
-
-void uv_update_time(uv_loop_t* loop) {
-  uint64_t new_time = uv__hrtime(UV__MILLISEC);
-  assert(new_time >= loop->time);
-  loop->time = new_time;
-}
-
-
-static int uv_timer_compare(uv_timer_t* a, uv_timer_t* b) {
-  if (a->due < b->due)
-    return -1;
-  if (a->due > b->due)
-    return 1;
-  /*
-   *  compare start_id when both has the same due. start_id is
-   *  allocated with loop->timer_counter in uv_timer_start().
-   */
-  if (a->start_id < b->start_id)
-    return -1;
-  if (a->start_id > b->start_id)
-    return 1;
-  return 0;
-}
-
-
-RB_GENERATE_STATIC(uv_timer_tree_s, uv_timer_s, tree_entry, uv_timer_compare)
-
-
-int uv_timer_init(uv_loop_t* loop, uv_timer_t* handle) {
-  uv__handle_init(loop, (uv_handle_t*) handle, UV_TIMER);
-  handle->timer_cb = NULL;
-  handle->repeat = 0;
-
-  return 0;
-}
-
-
-void uv_timer_endgame(uv_loop_t* loop, uv_timer_t* handle) {
-  if (handle->flags & UV__HANDLE_CLOSING) {
-    assert(!(handle->flags & UV_HANDLE_CLOSED));
-    uv__handle_close(handle);
-  }
-}
-
-
-static uint64_t get_clamped_due_time(uint64_t loop_time, uint64_t timeout) {
-  uint64_t clamped_timeout;
-
-  clamped_timeout = loop_time + timeout;
-  if (clamped_timeout < timeout)
-    clamped_timeout = (uint64_t) -1;
-
-  return clamped_timeout;
-}
-
-
-int uv_timer_start(uv_timer_t* handle, uv_timer_cb timer_cb, uint64_t timeout,
-    uint64_t repeat) {
-  uv_loop_t* loop = handle->loop;
-  uv_timer_t* old;
-
-  if (timer_cb == NULL)
-    return UV_EINVAL;
-
-  if (uv__is_active(handle))
-    uv_timer_stop(handle);
-
-  handle->timer_cb = timer_cb;
-  handle->due = get_clamped_due_time(loop->time, timeout);
-  handle->repeat = repeat;
-  uv__handle_start(handle);
-
-  /* start_id is the second index to be compared in uv__timer_cmp() */
-  handle->start_id = handle->loop->timer_counter++;
-
-  old = RB_INSERT(uv_timer_tree_s, &loop->timers, handle);
-  assert(old == NULL);
-
-  return 0;
-}
-
-
-int uv_timer_stop(uv_timer_t* handle) {
-  uv_loop_t* loop = handle->loop;
-
-  if (!uv__is_active(handle))
-    return 0;
-
-  RB_REMOVE(uv_timer_tree_s, &loop->timers, handle);
-  uv__handle_stop(handle);
-
-  return 0;
-}
-
-
-int uv_timer_again(uv_timer_t* handle) {
-  /* If timer_cb is NULL that means that the timer was never started. */
-  if (!handle->timer_cb) {
-    return UV_EINVAL;
-  }
-
-  if (handle->repeat) {
-    uv_timer_stop(handle);
-    uv_timer_start(handle, handle->timer_cb, handle->repeat, handle->repeat);
-  }
-
-  return 0;
-}
-
-
-void uv_timer_set_repeat(uv_timer_t* handle, uint64_t repeat) {
-  assert(handle->type == UV_TIMER);
-  handle->repeat = repeat;
-}
-
-
-uint64_t uv_timer_get_repeat(const uv_timer_t* handle) {
-  assert(handle->type == UV_TIMER);
-  return handle->repeat;
-}
-
-
-DWORD uv__next_timeout(const uv_loop_t* loop) {
-  uv_timer_t* timer;
-  int64_t delta;
-
-  /* Check if there are any running timers
-   * Need to cast away const first, since RB_MIN doesn't know what we are
-   * going to do with this return value, it can't be marked const
-   */
-  timer = RB_MIN(uv_timer_tree_s, &((uv_loop_t*)loop)->timers);
-  if (timer) {
-    delta = timer->due - loop->time;
-    if (delta >= UINT_MAX - 1) {
-      /* A timeout value of UINT_MAX means infinite, so that's no good. */
-      return UINT_MAX - 1;
-    } else if (delta < 0) {
-      /* Negative timeout values are not allowed */
-      return 0;
-    } else {
-      return (DWORD)delta;
-    }
-  } else {
-    /* No timers */
-    return INFINITE;
-  }
-}
-
-
-void uv_process_timers(uv_loop_t* loop) {
-  uv_timer_t* timer;
-
-  /* Call timer callbacks */
-  for (timer = RB_MIN(uv_timer_tree_s, &loop->timers);
-       timer != NULL && timer->due <= loop->time;
-       timer = RB_MIN(uv_timer_tree_s, &loop->timers)) {
-
-    uv_timer_stop(timer);
-    uv_timer_again(timer);
-    timer->timer_cb((uv_timer_t*) timer);
-  }
-}
diff --git a/deps/libuv/src/win/tty.c b/deps/libuv/src/win/tty.c
index ecf7bc9b5..d62aafb7d 100644
--- a/deps/libuv/src/win/tty.c
+++ b/deps/libuv/src/win/tty.c
@@ -25,7 +25,7 @@
 #include <stdlib.h>
 
 #if defined(_MSC_VER) && _MSC_VER < 1600
-# include "stdint-msvc2008.h"
+# include "uv/stdint-msvc2008.h"
 #else
 # include <stdint.h>
 #endif
@@ -205,8 +205,8 @@ int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, uv_file fd, int readable) {
       return uv_translate_sys_error(GetLastError());
     }
 
-    /* Obtain the the tty_output_lock because the virtual window state is */
-    /* shared between all uv_tty_t handles. */
+    /* Obtain the tty_output_lock because the virtual window state is shared
+     * between all uv_tty_t handles. */
     uv_sem_wait(&uv_tty_output_lock);
 
     if (uv__vterm_state == UV_UNCHECKED)
@@ -484,8 +484,8 @@ static DWORD CALLBACK uv_tty_line_read_thread(void* data) {
     bytes = MAX_INPUT_BUFFER_LENGTH;
   }
 
-  /* At last, unicode! */
-  /* One utf-16 codeunit never takes more than 3 utf-8 codeunits to encode */
+  /* At last, unicode! One utf-16 codeunit never takes more than 3 utf-8
+   * codeunits to encode. */
   chars = bytes / 3;
 
   status = InterlockedExchange(&uv__read_console_status, IN_PROGRESS);
@@ -620,10 +620,10 @@ static const char* get_vt100_fn_key(DWORD code, char shift, char ctrl,
       }
 
   switch (code) {
-    /* These mappings are the same as Cygwin's. Unmodified and alt-modified */
-    /* keypad keys comply with linux console, modifiers comply with xterm */
-    /* modifier usage. F1..f12 and shift-f1..f10 comply with linux console, */
-    /* f6..f12 with and without modifiers comply with rxvt. */
+    /* These mappings are the same as Cygwin's. Unmodified and alt-modified
+     * keypad keys comply with linux console, modifiers comply with xterm
+     * modifier usage. F1. f12 and shift-f1. f10 comply with linux console, f6.
+     * f12 with and without modifiers comply with rxvt. */
     VK_CASE(VK_INSERT,  "[2~",  "[2;2~", "[2;5~", "[2;6~")
     VK_CASE(VK_END,     "[4~",  "[4;2~", "[4;5~", "[4;6~")
     VK_CASE(VK_DOWN,    "[B",   "[1;2B", "[1;5B", "[1;6B")
@@ -706,8 +706,8 @@ void uv_process_tty_read_raw_req(uv_loop_t* loop, uv_tty_t* handle,
     goto out;
   }
 
-  /* Windows sends a lot of events that we're not interested in, so buf */
-  /* will be allocated on demand, when there's actually something to emit. */
+  /* Windows sends a lot of events that we're not interested in, so buf will be
+   * allocated on demand, when there's actually something to emit. */
   buf = uv_null_buf_;
   buf_used = 0;
 
@@ -733,16 +733,16 @@ void uv_process_tty_read_raw_req(uv_loop_t* loop, uv_tty_t* handle,
         continue;
       }
 
-      /* Ignore keyup events, unless the left alt key was held and a valid */
-      /* unicode character was emitted. */
+      /* Ignore keyup events, unless the left alt key was held and a valid
+       * unicode character was emitted. */
       if (!KEV.bKeyDown && !(((KEV.dwControlKeyState & LEFT_ALT_PRESSED) ||
           KEV.wVirtualKeyCode==VK_MENU) && KEV.uChar.UnicodeChar != 0)) {
         continue;
       }
 
-      /* Ignore keypresses to numpad number keys if the left alt is held */
-      /* because the user is composing a character, or windows simulating */
-      /* this. */
+      /* Ignore keypresses to numpad number keys if the left alt is held
+       * because the user is composing a character, or windows simulating this.
+       */
       if ((KEV.dwControlKeyState & LEFT_ALT_PRESSED) &&
           !(KEV.dwControlKeyState & ENHANCED_KEY) &&
           (KEV.wVirtualKeyCode == VK_INSERT ||
@@ -779,8 +779,8 @@ void uv_process_tty_read_raw_req(uv_loop_t* loop, uv_tty_t* handle,
           continue;
         }
 
-        /* Prefix with \u033 if alt was held, but alt was not used as part */
-        /* a compose sequence. */
+        /* Prefix with \u033 if alt was held, but alt was not used as part a
+         * compose sequence. */
         if ((KEV.dwControlKeyState & (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
             && !(KEV.dwControlKeyState & (LEFT_CTRL_PRESSED |
             RIGHT_CTRL_PRESSED)) && KEV.bKeyDown) {
@@ -818,8 +818,8 @@ void uv_process_tty_read_raw_req(uv_loop_t* loop, uv_tty_t* handle,
         /* Whatever happened, the last character wasn't a high surrogate. */
         handle->tty.rd.last_utf16_high_surrogate = 0;
 
-        /* If the utf16 character(s) couldn't be converted something must */
-        /* be wrong. */
+        /* If the utf16 character(s) couldn't be converted something must be
+         * wrong. */
         if (!char_len) {
           handle->flags &= ~UV_HANDLE_READING;
           DECREASE_ACTIVE_COUNT(loop, handle);
@@ -950,8 +950,7 @@ void uv_process_tty_read_line_req(uv_loop_t* loop, uv_tty_t* handle,
 
   } else {
     if (!(handle->flags & UV_HANDLE_CANCELLATION_PENDING)) {
-      /* Read successful */
-      /* TODO: read unicode, convert to utf-8 */
+      /* Read successful. TODO: read unicode, convert to utf-8 */
       DWORD bytes = req->u.io.overlapped.InternalHigh;
       handle->read_cb((uv_stream_t*) handle, bytes, &buf);
     } else {
@@ -975,9 +974,9 @@ void uv_process_tty_read_req(uv_loop_t* loop, uv_tty_t* handle,
   assert(handle->type == UV_TTY);
   assert(handle->flags & UV_HANDLE_TTY_READABLE);
 
-  /* If the read_line_buffer member is zero, it must have been an raw read. */
-  /* Otherwise it was a line-buffered read. */
-  /* FIXME: This is quite obscure. Use a flag or something. */
+  /* If the read_line_buffer member is zero, it must have been an raw read.
+   * Otherwise it was a line-buffered read. FIXME: This is quite obscure. Use a
+   * flag or something. */
   if (handle->tty.rd.read_line_buffer.len == 0) {
     uv_process_tty_read_raw_req(loop, handle, req);
   } else {
@@ -999,14 +998,14 @@ int uv_tty_read_start(uv_tty_t* handle, uv_alloc_cb alloc_cb,
   handle->read_cb = read_cb;
   handle->alloc_cb = alloc_cb;
 
-  /* If reading was stopped and then started again, there could still be a */
-  /* read request pending. */
+  /* If reading was stopped and then started again, there could still be a read
+   * request pending. */
   if (handle->flags & UV_HANDLE_READ_PENDING) {
     return 0;
   }
 
-  /* Maybe the user stopped reading half-way while processing key events. */
-  /* Short-circuit if this could be the case. */
+  /* Maybe the user stopped reading half-way while processing key events.
+   * Short-circuit if this could be the case. */
   if (handle->tty.rd.last_key_len > 0) {
     SET_REQ_SUCCESS(&handle->read_req);
     uv_insert_pending_req(handle->loop, (uv_req_t*) &handle->read_req);
@@ -1033,8 +1032,8 @@ int uv_tty_read_stop(uv_tty_t* handle) {
     return 0;
 
   if (handle->flags & UV_HANDLE_TTY_RAW) {
-    /* Cancel raw read */
-    /* Write some bullshit event to force the console wait to return. */
+    /* Cancel raw read. Write some bullshit event to force the console wait to
+     * return. */
     memset(&record, 0, sizeof record);
     if (!WriteConsoleInputW(handle->handle, &record, 1, &written)) {
       return GetLastError();
@@ -1116,8 +1115,8 @@ static void uv_tty_update_virtual_window(CONSOLE_SCREEN_BUFFER_INFO* info) {
     uv_tty_virtual_offset = info->dwCursorPosition.Y;
   } else if (uv_tty_virtual_offset < info->dwCursorPosition.Y -
              uv_tty_virtual_height + 1) {
-    /* If suddenly find the cursor outside of the virtual window, it must */
-    /* have somehow scrolled. Update the virtual window offset. */
+    /* If suddenly find the cursor outside of the virtual window, it must have
+     * somehow scrolled. Update the virtual window offset. */
     uv_tty_virtual_offset = info->dwCursorPosition.Y -
                             uv_tty_virtual_height + 1;
   }
@@ -1304,8 +1303,8 @@ static int uv_tty_clear(uv_tty_t* handle, int dir, char entire_screen,
     x2 = 0;
     x2r = 1;
   } else {
-    /* Clear to end of row. We pretend the console is 65536 characters wide, */
-    /* uv_tty_make_real_coord will clip it to the actual console width. */
+    /* Clear to end of row. We pretend the console is 65536 characters wide,
+     * uv_tty_make_real_coord will clip it to the actual console width. */
     x2 = 0xffff;
     x2r = 0;
   }
@@ -1613,8 +1612,8 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
                              const uv_buf_t bufs[],
                              unsigned int nbufs,
                              DWORD* error) {
-  /* We can only write 8k characters at a time. Windows can't handle */
-  /* much more characters in a single console write anyway. */
+  /* We can only write 8k characters at a time. Windows can't handle much more
+   * characters in a single console write anyway. */
   WCHAR utf16_buf[MAX_CONSOLE_CHAR];
   WCHAR* utf16_buffer;
   DWORD utf16_buf_used = 0;
@@ -1650,9 +1649,8 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
   unsigned char previous_eol = handle->tty.wr.previous_eol;
   unsigned char ansi_parser_state = handle->tty.wr.ansi_parser_state;
 
-  /* Store the error here. If we encounter an error, stop trying to do i/o */
-  /* but keep parsing the buffer so we leave the parser in a consistent */
-  /* state. */
+  /* Store the error here. If we encounter an error, stop trying to do i/o but
+   * keep parsing the buffer so we leave the parser in a consistent state. */
   *error = ERROR_SUCCESS;
 
   utf16_buffer = utf16_buf;
@@ -1700,9 +1698,9 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
     for (j = 0; j < buf.len; j++) {
       unsigned char c = buf.base[j];
 
-      /* Run the character through the utf8 decoder We happily accept non */
-      /* shortest form encodings and invalid code points - there's no real */
-      /* harm that can be done. */
+      /* Run the character through the utf8 decoder We happily accept non
+       * shortest form encodings and invalid code points - there's no real harm
+       * that can be done. */
       if (utf8_bytes_left == 0) {
         /* Read utf-8 start byte */
         DWORD first_zero_bit;
@@ -1742,8 +1740,8 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
         /* Start byte where continuation was expected. */
         utf8_bytes_left = 0;
         utf8_codepoint = UNICODE_REPLACEMENT_CHARACTER;
-        /* Patch buf offset so this character will be parsed again as a */
-        /* start byte. */
+        /* Patch buf offset so this character will be parsed again as a start
+         * byte. */
         j--;
       }
 
@@ -1776,8 +1774,8 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
           case '_':
           case 'P':
           case ']':
-            /* Not supported, but we'll have to parse until we see a stop */
-            /* code, e.g. ESC \ or BEL. */
+            /* Not supported, but we'll have to parse until we see a stop code,
+             * e. g. ESC \ or BEL. */
             ansi_parser_state = ANSI_ST_CONTROL;
             continue;
 
@@ -1859,8 +1857,9 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
               continue;
 
             } else {
-              /* If ANSI_IN_ARG is not set, add another argument and */
-              /* default it to 0. */
+              /* If ANSI_IN_ARG is not set, add another argument and default it
+               * to 0. */
+
               /* Check for too many arguments */
               if (handle->tty.wr.ansi_csi_argc >= ARRAY_SIZE(handle->tty.wr.ansi_csi_argv)) {
                 ansi_parser_state |= ANSI_IGNORE;
@@ -1874,9 +1873,9 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
 
           } else if (utf8_codepoint == '?' && !(ansi_parser_state & ANSI_IN_ARG) &&
                      handle->tty.wr.ansi_csi_argc == 0) {
-            /* Ignores '?' if it is the first character after CSI[ */
-            /* This is an extension character from the VT100 codeset */
-            /* that is supported and used by most ANSI terminals today. */
+            /* Ignores '?' if it is the first character after CSI[. This is an
+             * extension character from the VT100 codeset that is supported and
+             * used by most ANSI terminals today. */
             continue;
 
           } else if (utf8_codepoint >= '@' && utf8_codepoint <= '~' &&
@@ -2006,8 +2005,8 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
             continue;
 
           } else {
-            /* We don't support commands that use private mode characters or */
-            /* intermediaries. Ignore the rest of the sequence. */
+            /* We don't support commands that use private mode characters or
+             * intermediaries. Ignore the rest of the sequence. */
             ansi_parser_state |= ANSI_IGNORE;
             continue;
           }
@@ -2020,8 +2019,8 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
         }
 
       } else if (ansi_parser_state & ANSI_ST_CONTROL) {
-        /* Unsupported control code */
-        /* Ignore everything until we see BEL or ESC \ */
+        /* Unsupported control code.
+         * Ignore everything until we see `BEL` or `ESC \`. */
         if (ansi_parser_state & ANSI_IN_STRING) {
           if (!(ansi_parser_state & ANSI_BACKSLASH_SEEN)) {
             if (utf8_codepoint == '"') {
@@ -2055,9 +2054,9 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
         abort();
       }
 
-      /* We wouldn't mind emitting utf-16 surrogate pairs. Too bad, the */
-      /* windows console doesn't really support UTF-16, so just emit the */
-      /* replacement character. */
+      /* We wouldn't mind emitting utf-16 surrogate pairs. Too bad, the windows
+       * console doesn't really support UTF-16, so just emit the replacement
+       * character. */
       if (utf8_codepoint > 0xffff) {
         utf8_codepoint = UNICODE_REPLACEMENT_CHARACTER;
       }
@@ -2071,10 +2070,10 @@ static int uv_tty_write_bufs(uv_tty_t* handle,
           utf16_buf[utf16_buf_used++] = L'\r';
           utf16_buf[utf16_buf_used++] = L'\n';
         } else if (utf8_codepoint == 0x0d && previous_eol == 0x0a) {
-          /* \n was followed by \r; do not print the \r, since */
-          /* the source was either \r\n\r (so the second \r is */
-          /* redundant) or was \n\r (so the \n was processed */
-          /* by the last case and an \r automatically inserted). */
+          /* \n was followed by \r; do not print the \r, since the source was
+           * either \r\n\r (so the second \r is redundant) or was \n\r (so the
+           * \n was processed by the last case and an \r automatically
+           * inserted). */
         } else {
           /* \r without \n; print \r as-is. */
           ENSURE_BUFFER_SPACE(1);
@@ -2209,7 +2208,7 @@ void uv_tty_endgame(uv_loop_t* loop, uv_tty_t* handle) {
 
     /* TTY shutdown is really just a no-op */
     if (handle->stream.conn.shutdown_req->cb) {
-      if (handle->flags & UV__HANDLE_CLOSING) {
+      if (handle->flags & UV_HANDLE_CLOSING) {
         handle->stream.conn.shutdown_req->cb(handle->stream.conn.shutdown_req, UV_ECANCELED);
       } else {
         handle->stream.conn.shutdown_req->cb(handle->stream.conn.shutdown_req, 0);
@@ -2222,10 +2221,10 @@ void uv_tty_endgame(uv_loop_t* loop, uv_tty_t* handle) {
     return;
   }
 
-  if (handle->flags & UV__HANDLE_CLOSING &&
+  if (handle->flags & UV_HANDLE_CLOSING &&
       handle->reqs_pending == 0) {
-    /* The wait handle used for raw reading should be unregistered when the */
-    /* wait callback runs. */
+    /* The wait handle used for raw reading should be unregistered when the
+     * wait callback runs. */
     assert(!(handle->flags & UV_HANDLE_TTY_READABLE) ||
            handle->tty.rd.read_raw_wait == NULL);
 
diff --git a/deps/libuv/src/win/udp.c b/deps/libuv/src/win/udp.c
index cd1d0e07b..402aeea66 100644
--- a/deps/libuv/src/win/udp.c
+++ b/deps/libuv/src/win/udp.c
@@ -74,8 +74,8 @@ static int uv_udp_set_socket(uv_loop_t* loop, uv_udp_t* handle, SOCKET socket,
     return GetLastError();
   }
 
-  /* Associate it with the I/O completion port. */
-  /* Use uv_handle_t pointer as completion key. */
+  /* Associate it with the I/O completion port. Use uv_handle_t pointer as
+   * completion key. */
   if (CreateIoCompletionPort((HANDLE)socket,
                              loop->iocp,
                              (ULONG_PTR)socket,
@@ -83,31 +83,28 @@ static int uv_udp_set_socket(uv_loop_t* loop, uv_udp_t* handle, SOCKET socket,
     return GetLastError();
   }
 
-  if (pSetFileCompletionNotificationModes) {
-    /* All known Windows that support SetFileCompletionNotificationModes */
-    /* have a bug that makes it impossible to use this function in */
-    /* conjunction with datagram sockets. We can work around that but only */
-    /* if the user is using the default UDP driver (AFD) and has no other */
-    /* LSPs stacked on top. Here we check whether that is the case. */
-    opt_len = (int) sizeof info;
-    if (getsockopt(socket,
-                   SOL_SOCKET,
-                   SO_PROTOCOL_INFOW,
-                   (char*) &info,
-                   &opt_len) == SOCKET_ERROR) {
-      return GetLastError();
-    }
+  /* All known Windows that support SetFileCompletionNotificationModes have a
+   * bug that makes it impossible to use this function in conjunction with
+   * datagram sockets. We can work around that but only if the user is using
+   * the default UDP driver (AFD) and has no other. LSPs stacked on top. Here
+   * we check whether that is the case. */
+  opt_len = (int) sizeof info;
+  if (getsockopt(
+          socket, SOL_SOCKET, SO_PROTOCOL_INFOW, (char*) &info, &opt_len) ==
+      SOCKET_ERROR) {
+    return GetLastError();
+  }
 
-    if (info.ProtocolChain.ChainLen == 1) {
-      if (pSetFileCompletionNotificationModes((HANDLE)socket,
-          FILE_SKIP_SET_EVENT_ON_HANDLE |
-          FILE_SKIP_COMPLETION_PORT_ON_SUCCESS)) {
-        handle->flags |= UV_HANDLE_SYNC_BYPASS_IOCP;
-        handle->func_wsarecv = uv_wsarecv_workaround;
-        handle->func_wsarecvfrom = uv_wsarecvfrom_workaround;
-      } else if (GetLastError() != ERROR_INVALID_FUNCTION) {
-        return GetLastError();
-      }
+  if (info.ProtocolChain.ChainLen == 1) {
+    if (SetFileCompletionNotificationModes(
+            (HANDLE) socket,
+            FILE_SKIP_SET_EVENT_ON_HANDLE |
+                FILE_SKIP_COMPLETION_PORT_ON_SUCCESS)) {
+      handle->flags |= UV_HANDLE_SYNC_BYPASS_IOCP;
+      handle->func_wsarecv = uv_wsarecv_workaround;
+      handle->func_wsarecvfrom = uv_wsarecvfrom_workaround;
+    } else if (GetLastError() != ERROR_INVALID_FUNCTION) {
+      return GetLastError();
     }
   }
 
@@ -191,7 +188,7 @@ void uv_udp_close(uv_loop_t* loop, uv_udp_t* handle) {
 
 
 void uv_udp_endgame(uv_loop_t* loop, uv_udp_t* handle) {
-  if (handle->flags & UV__HANDLE_CLOSING &&
+  if (handle->flags & UV_HANDLE_CLOSING &&
       handle->reqs_pending == 0) {
     assert(!(handle->flags & UV_HANDLE_CLOSED));
     uv__handle_close(handle);
@@ -245,12 +242,12 @@ static int uv_udp_maybe_bind(uv_udp_t* handle,
     handle->flags |= UV_HANDLE_IPV6;
 
   if (addr->sa_family == AF_INET6 && !(flags & UV_UDP_IPV6ONLY)) {
-    /* On windows IPV6ONLY is on by default. */
-    /* If the user doesn't specify it libuv turns it off. */
+    /* On windows IPV6ONLY is on by default. If the user doesn't specify it
+     * libuv turns it off. */
 
-    /* TODO: how to handle errors? This may fail if there is no ipv4 stack */
-    /* available, or when run on XP/2003 which have no support for dualstack */
-    /* sockets. For now we're silently ignoring the error. */
+    /* TODO: how to handle errors? This may fail if there is no ipv4 stack
+     * available, or when run on XP/2003 which have no support for dualstack
+     * sockets. For now we're silently ignoring the error. */
     setsockopt(handle->socket,
                IPPROTO_IPV6,
                IPV6_V6ONLY,
@@ -386,8 +383,8 @@ int uv__udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloc_cb,
   handle->recv_cb = recv_cb;
   handle->alloc_cb = alloc_cb;
 
-  /* If reading was stopped and then started again, there could still be a */
-  /* recv request pending. */
+  /* If reading was stopped and then started again, there could still be a recv
+   * request pending. */
   if (!(handle->flags & UV_HANDLE_READ_PENDING))
     uv_udp_queue_recv(loop, handle);
 
@@ -467,19 +464,19 @@ void uv_process_udp_recv_req(uv_loop_t* loop, uv_udp_t* handle,
   if (!REQ_SUCCESS(req)) {
     DWORD err = GET_REQ_SOCK_ERROR(req);
     if (err == WSAEMSGSIZE) {
-      /* Not a real error, it just indicates that the received packet */
-      /* was bigger than the receive buffer. */
+      /* Not a real error, it just indicates that the received packet was
+       * bigger than the receive buffer. */
     } else if (err == WSAECONNRESET || err == WSAENETRESET) {
-      /* A previous sendto operation failed; ignore this error. If */
-      /* zero-reading we need to call WSARecv/WSARecvFrom _without_ the */
-      /* MSG_PEEK flag to clear out the error queue. For nonzero reads, */
-      /* immediately queue a new receive. */
+      /* A previous sendto operation failed; ignore this error. If zero-reading
+       * we need to call WSARecv/WSARecvFrom _without_ the. MSG_PEEK flag to
+       * clear out the error queue. For nonzero reads, immediately queue a new
+       * receive. */
       if (!(handle->flags & UV_HANDLE_ZERO_READ)) {
         goto done;
       }
     } else {
-      /* A real error occurred. Report the error to the user only if we're */
-      /* currently reading. */
+      /* A real error occurred. Report the error to the user only if we're
+       * currently reading. */
       if (handle->flags & UV_HANDLE_READING) {
         uv_udp_recv_stop(handle);
         buf = (handle->flags & UV_HANDLE_ZERO_READ) ?
@@ -503,8 +500,8 @@ void uv_process_udp_recv_req(uv_loop_t* loop, uv_udp_t* handle,
     struct sockaddr_storage from;
     int from_len;
 
-    /* Do a nonblocking receive */
-    /* TODO: try to read multiple datagrams at once. FIONREAD maybe? */
+    /* Do a nonblocking receive.
+     * TODO: try to read multiple datagrams at once. FIONREAD maybe? */
     buf = uv_buf_init(NULL, 0);
     handle->alloc_cb((uv_handle_t*) handle, 65536, &buf);
     if (buf.base == NULL || buf.len == 0) {
@@ -741,7 +738,7 @@ int uv_udp_set_multicast_interface(uv_udp_t* handle, const char* interface_addr)
     return UV_EINVAL;
   }
 
-  if (!(handle->flags & UV_HANDLE_BOUND))
+  if (handle->socket == INVALID_SOCKET)
     return UV_EBADF;
 
   if (addr_st.ss_family == AF_INET) {
@@ -772,7 +769,7 @@ int uv_udp_set_multicast_interface(uv_udp_t* handle, const char* interface_addr)
 int uv_udp_set_broadcast(uv_udp_t* handle, int value) {
   BOOL optval = (BOOL) value;
 
-  if (!(handle->flags & UV_HANDLE_BOUND))
+  if (handle->socket == INVALID_SOCKET)
     return UV_EBADF;
 
   if (setsockopt(handle->socket,
@@ -818,7 +815,7 @@ int uv_udp_open(uv_udp_t* handle, uv_os_sock_t sock) {
       return UV_EINVAL;                                                       \
     }                                                                         \
                                                                               \
-    if (!(handle->flags & UV_HANDLE_BOUND))                                   \
+    if (handle->socket == INVALID_SOCKET)                                     \
       return UV_EBADF;                                                        \
                                                                               \
     if (!(handle->flags & UV_HANDLE_IPV6)) {                                  \
diff --git a/deps/libuv/src/win/util.c b/deps/libuv/src/win/util.c
index 6b2bc2d72..3e86ff150 100644
--- a/deps/libuv/src/win/util.c
+++ b/deps/libuv/src/win/util.c
@@ -37,7 +37,7 @@
 #include <tlhelp32.h>
 #include <windows.h>
 #include <userenv.h>
-
+#include <math.h>
 
 /*
  * Max title length; the only thing MSDN tells us about the maximum length
@@ -74,10 +74,6 @@
 static char *process_title;
 static CRITICAL_SECTION process_title_lock;
 
-/* Cached copy of the process id, written once. */
-static DWORD current_pid = 0;
-
-
 /* Interval (in seconds) of the high-resolution clock. */
 static double hrtime_interval_ = 0;
 
@@ -149,8 +145,8 @@ int uv_exepath(char* buffer, size_t* size_ptr) {
 
   uv__free(utf16_buffer);
 
-  /* utf8_len *does* include the terminating null at this point, but the */
-  /* returned size shouldn't. */
+  /* utf8_len *does* include the terminating null at this point, but the
+   * returned size shouldn't. */
   *size_ptr = utf8_len - 1;
   return 0;
 
@@ -173,16 +169,16 @@ int uv_cwd(char* buffer, size_t* size) {
   if (utf16_len == 0) {
     return uv_translate_sys_error(GetLastError());
   } else if (utf16_len > MAX_PATH) {
-    /* This should be impossible;  however the CRT has a code path to deal */
-    /* with this scenario, so I added a check anyway. */
+    /* This should be impossible; however the CRT has a code path to deal with
+     * this scenario, so I added a check anyway. */
     return UV_EIO;
   }
 
   /* utf16_len contains the length, *not* including the terminating null. */
   utf16_buffer[utf16_len] = L'\0';
 
-  /* The returned directory should not have a trailing slash, unless it */
-  /* points at a drive root, like c:\. Remove it if needed.*/
+  /* The returned directory should not have a trailing slash, unless it points
+   * at a drive root, like c:\. Remove it if needed. */
   if (utf16_buffer[utf16_len - 1] == L'\\' &&
       !(utf16_len == 3 && utf16_buffer[1] == L':')) {
     utf16_len--;
@@ -239,9 +235,9 @@ int uv_chdir(const char* dir) {
                           utf16_buffer,
                           MAX_PATH) == 0) {
     DWORD error = GetLastError();
-    /* The maximum length of the current working directory is 260 chars, */
-    /* including terminating null. If it doesn't fit, the path name must be */
-    /* too long. */
+    /* The maximum length of the current working directory is 260 chars,
+     * including terminating null. If it doesn't fit, the path name must be too
+     * long. */
     if (error == ERROR_INSUFFICIENT_BUFFER) {
       return UV_ENAMETOOLONG;
     } else {
@@ -253,9 +249,9 @@ int uv_chdir(const char* dir) {
     return uv_translate_sys_error(GetLastError());
   }
 
-  /* Windows stores the drive-local path in an "hidden" environment variable, */
-  /* which has the form "=C:=C:\Windows". SetCurrentDirectory does not */
-  /* update this, so we'll have to do it. */
+  /* Windows stores the drive-local path in an "hidden" environment variable,
+   * which has the form "=C:=C:\Windows". SetCurrentDirectory does not update
+   * this, so we'll have to do it. */
   utf16_len = GetCurrentDirectoryW(MAX_PATH, utf16_buffer);
   if (utf16_len == 0) {
     return uv_translate_sys_error(GetLastError());
@@ -263,8 +259,8 @@ int uv_chdir(const char* dir) {
     return UV_EIO;
   }
 
-  /* The returned directory should not have a trailing slash, unless it */
-  /* points at a drive root, like c:\. Remove it if needed. */
+  /* The returned directory should not have a trailing slash, unless it points
+   * at a drive root, like c:\. Remove it if needed. */
   if (utf16_buffer[utf16_len - 1] == L'\\' &&
       !(utf16_len == 3 && utf16_buffer[1] == L':')) {
     utf16_len--;
@@ -272,8 +268,8 @@ int uv_chdir(const char* dir) {
   }
 
   if (utf16_len < 2 || utf16_buffer[1] != L':') {
-    /* Doesn't look like a drive letter could be there - probably an UNC */
-    /* path. TODO: Need to handle win32 namespaces like \\?\C:\ ? */
+    /* Doesn't look like a drive letter could be there - probably an UNC path.
+     * TODO: Need to handle win32 namespaces like \\?\C:\ ? */
     drive_letter = 0;
   } else if (utf16_buffer[0] >= L'A' && utf16_buffer[0] <= L'Z') {
     drive_letter = utf16_buffer[0];
@@ -359,14 +355,6 @@ uv_pid_t uv_os_getppid(void) {
 }
 
 
-int uv_current_pid(void) {
-  if (current_pid == 0) {
-    current_pid = GetCurrentProcessId();
-  }
-  return current_pid;
-}
-
-
 char** uv_setup_args(int argc, char** argv) {
   return argv;
 }
@@ -615,7 +603,7 @@ int uv_cpu_info(uv_cpu_info_t** cpu_infos_ptr, int* cpu_count_ptr) {
   SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION* sppi;
   DWORD sppi_size;
   SYSTEM_INFO system_info;
-  DWORD cpu_count, r, i;
+  DWORD cpu_count, i;
   NTSTATUS status;
   ULONG result_size;
   int err;
@@ -670,34 +658,33 @@ int uv_cpu_info(uv_cpu_info_t** cpu_infos_ptr, int* cpu_count_ptr) {
 
     assert(len > 0 && len < ARRAY_SIZE(key_name));
 
-    r = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
-                      key_name,
-                      0,
-                      KEY_QUERY_VALUE,
-                      &processor_key);
-    if (r != ERROR_SUCCESS) {
-      err = GetLastError();
+    err = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
+                        key_name,
+                        0,
+                        KEY_QUERY_VALUE,
+                        &processor_key);
+    if (err != ERROR_SUCCESS) {
       goto error;
     }
 
-    if (RegQueryValueExW(processor_key,
-                         L"~MHz",
-                         NULL,
-                         NULL,
-                         (BYTE*) &cpu_speed,
-                         &cpu_speed_size) != ERROR_SUCCESS) {
-      err = GetLastError();
+    err = RegQueryValueExW(processor_key,
+                           L"~MHz",
+                           NULL,
+                           NULL,
+                           (BYTE*)&cpu_speed,
+                           &cpu_speed_size);
+    if (err != ERROR_SUCCESS) {
       RegCloseKey(processor_key);
       goto error;
     }
 
-    if (RegQueryValueExW(processor_key,
-                         L"ProcessorNameString",
-                         NULL,
-                         NULL,
-                         (BYTE*) &cpu_brand,
-                         &cpu_brand_size) != ERROR_SUCCESS) {
-      err = GetLastError();
+    err = RegQueryValueExW(processor_key,
+                           L"ProcessorNameString",
+                           NULL,
+                           NULL,
+                           (BYTE*)&cpu_brand,
+                           &cpu_brand_size);
+    if (err != ERROR_SUCCESS) {
       RegCloseKey(processor_key);
       goto error;
     }
@@ -843,17 +830,17 @@ int uv_interface_addresses(uv_interface_address_t** addresses_ptr,
   }
 
 
-  /* Fetch the size of the adapters reported by windows, and then get the */
-  /* list itself. */
+  /* Fetch the size of the adapters reported by windows, and then get the list
+   * itself. */
   win_address_buf_size = 0;
   win_address_buf = NULL;
 
   for (;;) {
     ULONG r;
 
-    /* If win_address_buf is 0, then GetAdaptersAddresses will fail with */
-    /* ERROR_BUFFER_OVERFLOW, and the required buffer size will be stored in */
-    /* win_address_buf_size. */
+    /* If win_address_buf is 0, then GetAdaptersAddresses will fail with.
+     * ERROR_BUFFER_OVERFLOW, and the required buffer size will be stored in
+     * win_address_buf_size. */
     r = GetAdaptersAddresses(AF_UNSPEC,
                              flags,
                              NULL,
@@ -867,8 +854,8 @@ int uv_interface_addresses(uv_interface_address_t** addresses_ptr,
 
     switch (r) {
       case ERROR_BUFFER_OVERFLOW:
-        /* This happens when win_address_buf is NULL or too small to hold */
-        /* all adapters. */
+        /* This happens when win_address_buf is NULL or too small to hold all
+         * adapters. */
         win_address_buf = uv__malloc(win_address_buf_size);
         if (win_address_buf == NULL)
           return UV_ENOMEM;
@@ -902,15 +889,15 @@ int uv_interface_addresses(uv_interface_address_t** addresses_ptr,
         return UV_ENOBUFS;
 
       default:
-        /* Other (unspecified) errors can happen, but we don't have any */
-        /* special meaning for them. */
+        /* Other (unspecified) errors can happen, but we don't have any special
+         * meaning for them. */
         assert(r != ERROR_SUCCESS);
         return uv_translate_sys_error(r);
     }
   }
 
-  /* Count the number of enabled interfaces and compute how much space is */
-  /* needed to store their info. */
+  /* Count the number of enabled interfaces and compute how much space is
+   * needed to store their info. */
   count = 0;
   uv_address_buf_size = 0;
 
@@ -920,9 +907,9 @@ int uv_interface_addresses(uv_interface_address_t** addresses_ptr,
     IP_ADAPTER_UNICAST_ADDRESS* unicast_address;
     int name_size;
 
-    /* Interfaces that are not 'up' should not be reported. Also skip */
-    /* interfaces that have no associated unicast address, as to avoid */
-    /* allocating space for the name for this interface. */
+    /* Interfaces that are not 'up' should not be reported. Also skip
+     * interfaces that have no associated unicast address, as to avoid
+     * allocating space for the name for this interface. */
     if (adapter->OperStatus != IfOperStatusUp ||
         adapter->FirstUnicastAddress == NULL)
       continue;
@@ -942,8 +929,8 @@ int uv_interface_addresses(uv_interface_address_t** addresses_ptr,
     }
     uv_address_buf_size += name_size;
 
-    /* Count the number of addresses associated with this interface, and */
-    /* compute the size. */
+    /* Count the number of addresses associated with this interface, and
+     * compute the size. */
     for (unicast_address = (IP_ADAPTER_UNICAST_ADDRESS*)
                            adapter->FirstUnicastAddress;
          unicast_address != NULL;
@@ -960,8 +947,8 @@ int uv_interface_addresses(uv_interface_address_t** addresses_ptr,
     return UV_ENOMEM;
   }
 
-  /* Compute the start of the uv_interface_address_t array, and the place in */
-  /* the buffer where the interface names will be stored. */
+  /* Compute the start of the uv_interface_address_t array, and the place in
+   * the buffer where the interface names will be stored. */
   uv_address = uv_address_buf;
   name_buf = (char*) (uv_address_buf + count);
 
@@ -1200,8 +1187,8 @@ int uv_os_tmpdir(char* buffer, size_t* size) {
     return UV_EIO;
   }
 
-  /* The returned directory should not have a trailing slash, unless it */
-  /* points at a drive root, like c:\. Remove it if needed.*/
+  /* The returned directory should not have a trailing slash, unless it points
+   * at a drive root, like c:\. Remove it if needed. */
   if (path[len - 1] == L'\\' &&
       !(len == 3 && path[1] == L':')) {
     len--;
diff --git a/deps/libuv/src/win/winapi.c b/deps/libuv/src/win/winapi.c
index 4ccdf0a5f..0fd598eac 100644
--- a/deps/libuv/src/win/winapi.c
+++ b/deps/libuv/src/win/winapi.c
@@ -34,21 +34,6 @@ sNtQueryVolumeInformationFile pNtQueryVolumeInformationFile;
 sNtQueryDirectoryFile pNtQueryDirectoryFile;
 sNtQuerySystemInformation pNtQuerySystemInformation;
 
-
-/* Kernel32 function pointers */
-sGetQueuedCompletionStatusEx pGetQueuedCompletionStatusEx;
-sSetFileCompletionNotificationModes pSetFileCompletionNotificationModes;
-sCreateSymbolicLinkW pCreateSymbolicLinkW;
-sCancelIoEx pCancelIoEx;
-sInitializeConditionVariable pInitializeConditionVariable;
-sSleepConditionVariableCS pSleepConditionVariableCS;
-sSleepConditionVariableSRW pSleepConditionVariableSRW;
-sWakeAllConditionVariable pWakeAllConditionVariable;
-sWakeConditionVariable pWakeConditionVariable;
-sCancelSynchronousIo pCancelSynchronousIo;
-sGetFinalPathNameByHandleW pGetFinalPathNameByHandleW;
-
-
 /* Powrprof.dll function pointer */
 sPowerRegisterSuspendResumeNotification pPowerRegisterSuspendResumeNotification;
 
@@ -58,7 +43,6 @@ sSetWinEventHook pSetWinEventHook;
 
 void uv_winapi_init(void) {
   HMODULE ntdll_module;
-  HMODULE kernel32_module;
   HMODULE powrprof_module;
   HMODULE user32_module;
 
@@ -114,46 +98,6 @@ void uv_winapi_init(void) {
     uv_fatal_error(GetLastError(), "GetProcAddress");
   }
 
-  kernel32_module = GetModuleHandleA("kernel32.dll");
-  if (kernel32_module == NULL) {
-    uv_fatal_error(GetLastError(), "GetModuleHandleA");
-  }
-
-  pGetQueuedCompletionStatusEx = (sGetQueuedCompletionStatusEx) GetProcAddress(
-      kernel32_module,
-      "GetQueuedCompletionStatusEx");
-
-  pSetFileCompletionNotificationModes = (sSetFileCompletionNotificationModes)
-    GetProcAddress(kernel32_module, "SetFileCompletionNotificationModes");
-
-  pCreateSymbolicLinkW = (sCreateSymbolicLinkW)
-    GetProcAddress(kernel32_module, "CreateSymbolicLinkW");
-
-  pCancelIoEx = (sCancelIoEx)
-    GetProcAddress(kernel32_module, "CancelIoEx");
-
-  pInitializeConditionVariable = (sInitializeConditionVariable)
-    GetProcAddress(kernel32_module, "InitializeConditionVariable");
-
-  pSleepConditionVariableCS = (sSleepConditionVariableCS)
-    GetProcAddress(kernel32_module, "SleepConditionVariableCS");
-
-  pSleepConditionVariableSRW = (sSleepConditionVariableSRW)
-    GetProcAddress(kernel32_module, "SleepConditionVariableSRW");
-
-  pWakeAllConditionVariable = (sWakeAllConditionVariable)
-    GetProcAddress(kernel32_module, "WakeAllConditionVariable");
-
-  pWakeConditionVariable = (sWakeConditionVariable)
-    GetProcAddress(kernel32_module, "WakeConditionVariable");
-
-  pCancelSynchronousIo = (sCancelSynchronousIo)
-    GetProcAddress(kernel32_module, "CancelSynchronousIo");
-
-  pGetFinalPathNameByHandleW = (sGetFinalPathNameByHandleW)
-    GetProcAddress(kernel32_module, "GetFinalPathNameByHandleW");
-
-
   powrprof_module = LoadLibraryA("powrprof.dll");
   if (powrprof_module != NULL) {
     pPowerRegisterSuspendResumeNotification = (sPowerRegisterSuspendResumeNotification)
diff --git a/deps/libuv/src/win/winapi.h b/deps/libuv/src/win/winapi.h
index cc54b79b0..d0fcfd8e7 100644
--- a/deps/libuv/src/win/winapi.h
+++ b/deps/libuv/src/win/winapi.h
@@ -4076,8 +4076,8 @@
 # define STATUS_HASH_NOT_PRESENT ((NTSTATUS) 0xC000A101L)
 #endif
 
-/* This is not the NTSTATUS_FROM_WIN32 that the DDK provides, because the */
-/* DDK got it wrong! */
+/* This is not the NTSTATUS_FROM_WIN32 that the DDK provides, because the DDK
+ * got it wrong! */
 #ifdef NTSTATUS_FROM_WIN32
 # undef NTSTATUS_FROM_WIN32
 #endif
@@ -4642,56 +4642,6 @@ typedef NTSTATUS (NTAPI *sNtQueryDirectoryFile)
 # define ERROR_MUI_FILE_NOT_LOADED 15105
 #endif
 
-typedef BOOL (WINAPI *sGetQueuedCompletionStatusEx)
-             (HANDLE CompletionPort,
-              LPOVERLAPPED_ENTRY lpCompletionPortEntries,
-              ULONG ulCount,
-              PULONG ulNumEntriesRemoved,
-              DWORD dwMilliseconds,
-              BOOL fAlertable);
-
-typedef BOOL (WINAPI* sSetFileCompletionNotificationModes)
-             (HANDLE FileHandle,
-              UCHAR Flags);
-
-typedef BOOLEAN (WINAPI* sCreateSymbolicLinkW)
-                (LPCWSTR lpSymlinkFileName,
-                 LPCWSTR lpTargetFileName,
-                 DWORD dwFlags);
-
-typedef BOOL (WINAPI* sCancelIoEx)
-             (HANDLE hFile,
-              LPOVERLAPPED lpOverlapped);
-
-typedef VOID (WINAPI* sInitializeConditionVariable)
-             (PCONDITION_VARIABLE ConditionVariable);
-
-typedef BOOL (WINAPI* sSleepConditionVariableCS)
-             (PCONDITION_VARIABLE ConditionVariable,
-              PCRITICAL_SECTION CriticalSection,
-              DWORD dwMilliseconds);
-
-typedef BOOL (WINAPI* sSleepConditionVariableSRW)
-             (PCONDITION_VARIABLE ConditionVariable,
-              PSRWLOCK SRWLock,
-              DWORD dwMilliseconds,
-              ULONG Flags);
-
-typedef VOID (WINAPI* sWakeAllConditionVariable)
-             (PCONDITION_VARIABLE ConditionVariable);
-
-typedef VOID (WINAPI* sWakeConditionVariable)
-             (PCONDITION_VARIABLE ConditionVariable);
-
-typedef BOOL (WINAPI* sCancelSynchronousIo)
-             (HANDLE hThread);
-
-typedef DWORD (WINAPI* sGetFinalPathNameByHandleW)
-             (HANDLE hFile,
-              LPWSTR lpszFilePath,
-              DWORD cchFilePath,
-              DWORD dwFlags);
-
 /* from powerbase.h */
 #ifndef DEVICE_NOTIFY_CALLBACK
 # define DEVICE_NOTIFY_CALLBACK 2
@@ -4754,21 +4704,6 @@ extern sNtQueryVolumeInformationFile pNtQueryVolumeInformationFile;
 extern sNtQueryDirectoryFile pNtQueryDirectoryFile;
 extern sNtQuerySystemInformation pNtQuerySystemInformation;
 
-
-/* Kernel32 function pointers */
-extern sGetQueuedCompletionStatusEx pGetQueuedCompletionStatusEx;
-extern sSetFileCompletionNotificationModes pSetFileCompletionNotificationModes;
-extern sCreateSymbolicLinkW pCreateSymbolicLinkW;
-extern sCancelIoEx pCancelIoEx;
-extern sInitializeConditionVariable pInitializeConditionVariable;
-extern sSleepConditionVariableCS pSleepConditionVariableCS;
-extern sSleepConditionVariableSRW pSleepConditionVariableSRW;
-extern sWakeAllConditionVariable pWakeAllConditionVariable;
-extern sWakeConditionVariable pWakeConditionVariable;
-extern sCancelSynchronousIo pCancelSynchronousIo;
-extern sGetFinalPathNameByHandleW pGetFinalPathNameByHandleW;
-
-
 /* Powrprof.dll function pointer */
 extern sPowerRegisterSuspendResumeNotification pPowerRegisterSuspendResumeNotification;
 
diff --git a/deps/libuv/src/win/winsock.c b/deps/libuv/src/win/winsock.c
index 84188954d..5e7da2a8f 100644
--- a/deps/libuv/src/win/winsock.c
+++ b/deps/libuv/src/win/winsock.c
@@ -256,8 +256,8 @@ int uv_ntstatus_to_winsock_error(NTSTATUS status) {
     default:
       if ((status & (FACILITY_NTWIN32 << 16)) == (FACILITY_NTWIN32 << 16) &&
           (status & (ERROR_SEVERITY_ERROR | ERROR_SEVERITY_WARNING))) {
-        /* It's a windows error that has been previously mapped to an */
-        /* ntstatus code. */
+        /* It's a windows error that has been previously mapped to an ntstatus
+         * code. */
         return (DWORD) (status & 0xffff);
       } else {
         /* The default fallback for unmappable ntstatus codes. */
@@ -519,8 +519,8 @@ int WSAAPI uv_msafd_poll(SOCKET socket, AFD_POLL_INFO* info_in,
                                   sizeof *info_out);
 
   if (overlapped == NULL) {
-    /* If this is a blocking operation, wait for the event to become */
-    /* signaled, and then grab the real status from the io status block. */
+    /* If this is a blocking operation, wait for the event to become signaled,
+     * and then grab the real status from the io status block. */
     if (status == STATUS_PENDING) {
       DWORD r = WaitForSingleObject(event, INFINITE);
 
diff --git a/deps/libuv/uv.gyp b/deps/libuv/uv.gyp
index e41f9ff5d..37dcb3604 100644
--- a/deps/libuv/uv.gyp
+++ b/deps/libuv/uv.gyp
@@ -64,15 +64,16 @@
       'sources': [
         'common.gypi',
         'include/uv.h',
-        'include/tree.h',
-        'include/uv-errno.h',
-        'include/uv-threadpool.h',
-        'include/uv-version.h',
+        'include/uv/tree.h',
+        'include/uv/errno.h',
+        'include/uv/threadpool.h',
+        'include/uv/version.h',
         'src/fs-poll.c',
         'src/heap-inl.h',
         'src/inet.c',
         'src/queue.h',
         'src/threadpool.c',
+        'src/timer.c',
         'src/uv-data-getter-setters.c',
         'src/uv-common.c',
         'src/uv-common.h',
@@ -95,7 +96,7 @@
             '_GNU_SOURCE',
           ],
           'sources': [
-            'include/uv-win.h',
+            'include/uv/win.h',
             'src/win/async.c',
             'src/win/atomicops-inl.h',
             'src/win/core.c',
@@ -123,7 +124,6 @@
             'src/win/stream-inl.h',
             'src/win/tcp.c',
             'src/win/tty.c',
-            'src/win/timer.c',
             'src/win/udp.c',
             'src/win/util.c',
             'src/win/winapi.c',
@@ -144,12 +144,12 @@
           },
         }, { # Not Windows i.e. POSIX
           'sources': [
-            'include/uv-unix.h',
-            'include/uv-linux.h',
-            'include/uv-sunos.h',
-            'include/uv-darwin.h',
-            'include/uv-bsd.h',
-            'include/uv-aix.h',
+            'include/uv/unix.h',
+            'include/uv/linux.h',
+            'include/uv/sunos.h',
+            'include/uv/darwin.h',
+            'include/uv/bsd.h',
+            'include/uv/aix.h',
             'src/unix/async.c',
             'src/unix/atomic-ops.h',
             'src/unix/core.c',
@@ -168,7 +168,6 @@
             'src/unix/stream.c',
             'src/unix/tcp.c',
             'src/unix/thread.c',
-            'src/unix/timer.c',
             'src/unix/tty.c',
             'src/unix/udp.c',
           ],
@@ -199,7 +198,7 @@
             ['uv_library=="shared_library" and OS!="mac" and OS!="zos"', {
               # This will cause gyp to set soname
               # Must correspond with UV_VERSION_MAJOR
-              # in include/uv-version.h
+              # in include/uv/version.h
               'product_extension': 'so.1',
             }],
           ],
diff --git a/src/gevent/libuv/_corecffi_build.py b/src/gevent/libuv/_corecffi_build.py
index f6d28971c..722157db0 100644
--- a/src/gevent/libuv/_corecffi_build.py
+++ b/src/gevent/libuv/_corecffi_build.py
@@ -81,6 +81,7 @@ def _libuv_source(rel_path):
     _libuv_source('uv-common.c'),
     _libuv_source('version.c'),
     _libuv_source('uv-data-getter-setters.c'),
+    _libuv_source('timer.c'),
 ]
 
 if WIN:
@@ -116,7 +117,6 @@ def _libuv_source(rel_path):
         _libuv_source('win/stream.c'),
         _libuv_source('win/tcp.c'),
         _libuv_source('win/thread.c'),
-        _libuv_source('win/timer.c'),
         _libuv_source('win/tty.c'),
         _libuv_source('win/udp.c'),
         _libuv_source('win/util.c'),
@@ -140,7 +140,6 @@ def _libuv_source(rel_path):
         _libuv_source('unix/stream.c'),
         _libuv_source('unix/tcp.c'),
         _libuv_source('unix/thread.c'),
-        _libuv_source('unix/timer.c'),
         _libuv_source('unix/tty.c'),
         _libuv_source('unix/udp.c'),
     ]
@@ -211,6 +210,8 @@ def _add_library(name):
 if sys.platform.startswith('linux'):
     _add_library('dl')
     _add_library('rt')
+    _define_macro('_GNU_SOURCE', 1)
+    _define_macro('_POSIX_C_SOURCE', '200112')
 elif sys.platform == 'darwin':
     _define_macro('_DARWIN_USE_64_BIT_INODE', 1)
     _define_macro('_DARWIN_UNLIMITED_SELECT', 1)
@@ -230,6 +231,7 @@ def _add_library(name):
     _define_macro('_CRT_NONSTDC_NO_DEPRECATE', 1)
     _define_macro('_CRT_SECURE_NO_WARNINGS', 1)
     _define_macro('_WIN32_WINNT', '0x0600')
+    _define_macro('WIN32_LEAN_AND_MEAN', 1)
     _add_library('advapi32')
     _add_library('iphlpapi')
     _add_library('psapi')
diff --git a/src/gevent/libuv/loop.py b/src/gevent/libuv/loop.py
index 323ab62a0..0f317c00b 100644
--- a/src/gevent/libuv/loop.py
+++ b/src/gevent/libuv/loop.py
@@ -151,8 +151,9 @@ def _init_and_start_check(self):
         self._signal_idle = ffi.new("uv_timer_t*")
         libuv.uv_timer_init(self._ptr, self._signal_idle)
         self._signal_idle.data = self._handle_to_self
+        sig_cb = ffi.cast('void(*)(uv_timer_t*)', libuv.python_check_callback)
         libuv.uv_timer_start(self._signal_idle,
-                             ffi.cast('void(*)(uv_timer_t*)', libuv.python_check_callback),
+                             sig_cb,
                              300,
                              300)
         libuv.uv_unref(self._signal_idle)