zos: make platform functional

Fix all functional test cases:

* use PLO compare,swap,store for atomic instruction
* do not use semaphore.h
* use xplink flag when linking
* scandir implementation
* nanosleep implementation
* add proctitle
* uv_loadavg
* uv_fs_event_init/start
* uv_fs_event_stop
* uv_exepath using __getthent syscall
* read free/total memory from mvs data areas
* uv_resident_set_memory implementation
* network interfaces implementation
* cpu_info implementation
* implement uv__hrtime
* make uv__fs_mkdtemp implementation
* epoll implementation for asyncio
* uv__fs_event_close implementation
* set process title
* read ancillary data that remains on queue
* ancillary data
* implement uv__fs_access
* use /dev/urandom for temporary directory name
* disable proctitle on zos completely

PR-URL: #1037
Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>

Makefile.am

@@ -402,8 +402,10 @@ libuv_la_CFLAGS += -D_UNIX03_THREADS \
                    -qFLOAT=IEEE
 libuv_la_LDFLAGS += -qXPLINK
 libuv_la_SOURCES += src/unix/pthread-fixes.c \
-                    src/unix/pthread-barrier.c
-libuv_la_SOURCES += src/unix/os390.c
+                    src/unix/pthread-barrier.c \
+                    src/unix/os390.c \
+                    src/unix/os390-syscalls.c \
+                    src/unix/proctitle.c
 endif
 
 if HAVE_PKG_CONFIG

include/pthread-barrier.h

@@ -18,7 +18,9 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #define _UV_PTHREAD_BARRIER_
 #include <errno.h>
 #include <pthread.h>
+#if !defined(__MVS__)
 #include <semaphore.h> /* sem_t */
+#endif
 
 #define PTHREAD_BARRIER_SERIAL_THREAD  0x12345
 

include/uv-os390.h

@@ -24,4 +24,7 @@
 
 #define UV_PLATFORM_SEM_T int
 
+#define UV_PLATFORM_LOOP_FIELDS                                               \
+  void* ep;                                                                   \
+
 #endif /* UV_MVS_H */

include/uv-unix.h

@@ -36,14 +36,18 @@
 #include <termios.h>
 #include <pwd.h>
 
+#if !defined(__MVS__)
 #include <semaphore.h>
+#endif
 #include <pthread.h>
 #include <signal.h>
 
 #include "uv-threadpool.h"
 
 #if defined(__linux__)
 # include "uv-linux.h"
+#elif defined (__MVS__)
+# include "uv-os390.h"
 #elif defined(_AIX)
 # include "uv-aix.h"
 #elif defined(__sun)

src/unix/atomic-ops.h

@@ -43,8 +43,12 @@ UV_UNUSED(static int cmpxchgi(int* ptr, int oldval, int newval)) {
   __compare_and_swap(ptr, &oldval, newval);
   return out;
 #elif defined(__MVS__)
-  return __plo_CS(ptr, (unsigned int*) ptr,
-                  oldval, (unsigned int*) &newval);
+  unsigned int op4;
+  if (__plo_CSST(ptr, (unsigned int*) &oldval, newval,
+                (unsigned int*) ptr, *ptr, &op4))
+    return oldval;
+  else
+    return op4;
 #else
   return __sync_val_compare_and_swap(ptr, oldval, newval);
 #endif
@@ -67,13 +71,18 @@ UV_UNUSED(static long cmpxchgl(long* ptr, long oldval, long newval)) {
 # endif /* if defined(__64BIT__) */
   return out;
 #elif defined (__MVS__)
-# ifdef _LP64
-  return __plo_CSGR(ptr, (unsigned long long*) ptr,
-                    oldval, (unsigned long long*) &newval);
-# else
-  return __plo_CS(ptr, (unsigned int*) ptr,
-                  oldval, (unsigned int*) &newval);
-# endif
+#ifdef _LP64
+  unsigned long long op4;
+  if (__plo_CSSTGR(ptr, (unsigned long long*) &oldval, newval,
+                  (unsigned long long*) ptr, *ptr, &op4))
+#else
+  unsigned long op4;
+  if (__plo_CSST(ptr, (unsigned int*) &oldval, newval,
+                (unsigned int*) ptr, *ptr, &op4))
+#endif
+    return oldval;
+  else
+    return op4;
 #else
   return __sync_val_compare_and_swap(ptr, oldval, newval);
 #endif

src/unix/core.c

@@ -517,6 +517,9 @@ int uv__close_nocheckstdio(int fd) {
 
 int uv__close(int fd) {
   assert(fd > STDERR_FILENO);  /* Catch stdio close bugs. */
+#if defined(__MVS__)
+  epoll_file_close(fd);
+#endif
   return uv__close_nocheckstdio(fd);
 }
 

src/unix/internal.h

@@ -38,6 +38,10 @@
 # include "linux-syscalls.h"
 #endif /* __linux__ */
 
+#if defined(__MVS__)
+# include "os390-syscalls.h"
+#endif /* __MVS__ */
+
 #if defined(__sun)
 # include <sys/port.h>
 # include <port.h>