Add support for building libdispatch on FreeBSD

CMakeLists.txt

@@ -83,6 +83,7 @@ option(BUILD_SHARED_LIBS "build shared libraries" ON)
 option(ENABLE_TESTING "build libdispatch tests" ON)
 
 if(CMAKE_SYSTEM_NAME STREQUAL Linux OR
+   CMAKE_SYSTEM_NAME STREQUAL FreeBSD OR
    CMAKE_SYSTEM_NAME STREQUAL Android)
   set(USE_GOLD_LINKER_DEFAULT ON)
 else()
@@ -95,6 +96,7 @@ set(DISPATCH_USE_THREAD_LOCAL_STORAGE ${ENABLE_THREAD_LOCAL_STORAGE})
 
 if(CMAKE_SYSTEM_NAME STREQUAL Linux OR
    CMAKE_SYSTEM_NAME STREQUAL Android OR
+   CMAKE_SYSTEM_NAME STREQUAL FreeBSD OR
    CMAKE_SYSTEM_NAME STREQUAL Windows)
   set(ENABLE_INTERNAL_PTHREAD_WORKQUEUES_DEFAULT ON)
 else()
@@ -120,6 +122,7 @@ option(INSTALL_PRIVATE_HEADERS "installs private headers in the same location as
 
 if(CMAKE_SYSTEM_NAME STREQUAL Linux OR
    CMAKE_SYSTEM_NAME STREQUAL Android OR
+   CMAKE_SYSTEM_NAME STREQUAL FreeBSD OR
    CMAKE_SYSTEM_NAME STREQUAL Windows)
   add_library(BlocksRuntime
               STATIC
@@ -264,6 +267,10 @@ if(CMAKE_SYSTEM_NAME STREQUAL Android)
   set(ENABLE_DTRACE_DEFAULT OFF)
 endif()
 
+if(CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
+  add_definitions(-D_WITH_DPRINTF)
+endif()
+
 if(ENABLE_DTRACE STREQUAL "")
   find_program(dtrace_EXECUTABLE dtrace)
   if(dtrace_EXECUTABLE)

cmake/config.h.in

@@ -139,10 +139,10 @@
 #cmakedefine HAVE_PTHREAD_MACHDEP_H
 
 /* Define to 1 if you have the `pthread_main_np' function. */
-#cmakedefine HAVE_PTHREAD_MAIN_NP
+#cmakedefine01 HAVE_PTHREAD_MAIN_NP
 
 /* Define to 1 if you have the <pthread_np.h> header file. */
-#cmakedefine HAVE_PTHREAD_NP_H
+#cmakedefine01 HAVE_PTHREAD_NP_H
 
 /* Define to 1 if you have the <pthread/qos.h> header file. */
 #cmakedefine HAVE_PTHREAD_QOS_H

dispatch/base.h

@@ -112,6 +112,14 @@
 #define DISPATCH_LINUX_UNAVAILABLE()
 #endif
 
+#ifdef __FreeBSD__
+#define DISPATCH_FREEBSD_UNAVAILABLE() \
+		DISPATCH_UNAVAILABLE_MSG( \
+		"This interface is unavailable on FreeBSD systems")
+#else
+#define DISPATCH_FREEBSD_UNAVAILABLE()
+#endif
+
 #ifndef DISPATCH_ALIAS_V2
 #if TARGET_OS_MAC
 #define DISPATCH_ALIAS_V2(sym)	 __asm__("_" #sym "$V2")

dispatch/dispatch.h

@@ -26,8 +26,8 @@
 #include <os/availability.h>
 #include <TargetConditionals.h>
 #include <os/base.h>
-#elif defined(__linux__)
-#include <os/linux_base.h>
+#elif defined(__linux__) || defined(__FreeBSD__)
+#include <os/generic_unix_base.h>
 #endif
 
 #include <sys/types.h>
@@ -40,7 +40,7 @@
 #endif
 #include <fcntl.h>
 
-#if defined(__linux__) && defined(__has_feature)
+#if (defined(__linux__) || defined(__FreeBSD__)) && defined(__has_feature)
 #if __has_feature(modules)
 #if !defined(__arm__)
 #include <stdio.h> // for off_t (to match Glibc.modulemap)

os/CMakeLists.txt

@@ -4,7 +4,7 @@
 
 install(FILES
           object.h
-          linux_base.h
+          generic_unix_base.h
         DESTINATION
           "${INSTALL_OS_HEADERS_DIR}")
 

os/Makefile.am

@@ -10,7 +10,7 @@ endif
 
 os_HEADERS=	\
 	object.h \
-	linux_base.h
+	generic_unix_base.h
 
 noinst_HEADERS=	\
 	object_private.h \

os/linux_base.h → os/generic_unix_base.h

@@ -10,12 +10,17 @@
  *
  */
 
-#ifndef __OS_LINUX_BASE__
-#define __OS_LINUX_BASE__
+#ifndef __OS_GENERIC_UNIX_BASE__
+#define __OS_GENERIC_UNIX_BASE__
 
 #if __has_include(<sys/sysmacros.h>)
 #include <sys/sysmacros.h>
 #endif
+
+#if defined(__FreeBSD__)
+#include <libutil.h>
+#include <fcntl.h>
+#endif
 #include <sys/param.h>
 
 #if __has_include(<sys/cdefs.h>)
@@ -120,4 +125,4 @@ enum { __VA_ARGS__ }; typedef _type _name##_t
 #endif
 #define OS_NOTHROW
 
-#endif /* __OS_LINUX_BASE__ */
+#endif /* __OS_GENERIC_UNIX_BASE__ */

os/object.h

@@ -26,8 +26,8 @@
 #include <os/availability.h>
 #include <TargetConditionals.h>
 #include <os/base.h>
-#elif defined(__linux__)
-#include <os/linux_base.h>
+#elif defined(__linux__) || defined(__FreeBSD__)
+#include <os/generic_unix_base.h>
 #endif
 
 /*!

os/voucher_activity_private.h

@@ -26,7 +26,7 @@
 #include <mach/mach_time.h>
 #include <firehose/tracepoint_private.h>
 #endif
-#ifndef __linux__
+#if __APPLE__
 #include <os/base.h>
 #include <os/availability.h>
 #endif

os/voucher_private.h

@@ -21,7 +21,7 @@
 #ifndef __OS_VOUCHER_PRIVATE__
 #define __OS_VOUCHER_PRIVATE__
 
-#ifndef __linux__
+#if __APPLE__
 #include <os/base.h>
 #include <os/availability.h>
 #endif

private/private.h

@@ -32,8 +32,8 @@
 #include <os/availability.h>
 #include <TargetConditionals.h>
 #include <os/base.h>
-#elif defined(__linux__)
-#include <os/linux_base.h>
+#elif defined(__linux__) || defined(__FreeBSD__)
+#include <os/generic_unix_base.h>
 #endif
 
 #if TARGET_OS_MAC
@@ -172,7 +172,7 @@ void _dispatch_prohibit_transition_to_multithreaded(bool prohibit);
 
 #if TARGET_OS_MAC
 #define DISPATCH_COCOA_COMPAT 1
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__FreeBSD__)
 #define DISPATCH_COCOA_COMPAT 1
 #else
 #define DISPATCH_COCOA_COMPAT 0
@@ -184,7 +184,7 @@ void _dispatch_prohibit_transition_to_multithreaded(bool prohibit);
 
 #if TARGET_OS_MAC
 typedef mach_port_t dispatch_runloop_handle_t;
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__FreeBSD__)
 typedef int dispatch_runloop_handle_t;
 #else
 #error "runloop support not implemented on this platform"

private/queue_private.h

@@ -49,6 +49,13 @@ enum {
 
 #define DISPATCH_QUEUE_FLAGS_MASK (DISPATCH_QUEUE_OVERCOMMIT)
 
+// On FreeBSD pthread_attr_t is a typedef to a pointer type
+#if defined(__FreeBSD__)
+#  define DISPATCH_QUEUE_NULLABLE_PTHREAD_ATTR_PTR _Nullable
+#else
+#  define DISPATCH_QUEUE_NULLABLE_PTHREAD_ATTR_PTR
+#endif
+
 /*!
  * @function dispatch_queue_attr_make_with_overcommit
  *
@@ -227,7 +234,7 @@ DISPATCH_EXPORT DISPATCH_MALLOC DISPATCH_RETURNS_RETAINED DISPATCH_WARN_RESULT
 DISPATCH_NOTHROW
 dispatch_queue_t
 dispatch_pthread_root_queue_create(const char *_Nullable label,
-	unsigned long flags, const pthread_attr_t *_Nullable attr,
+	unsigned long flags, const pthread_attr_t DISPATCH_QUEUE_NULLABLE_PTHREAD_ATTR_PTR *_Nullable attr,
 	dispatch_block_t _Nullable configure);
 
 /*!

src/CMakeLists.txt

@@ -47,8 +47,8 @@ add_library(dispatch
               shims/atomic_sfb.h
               shims/getprogname.h
               shims/hw_config.h
-              shims/linux_stubs.c
-              shims/linux_stubs.h
+              shims/generic_unix_stubs.c
+              shims/generic_unix_stubs.h
               shims/lock.c
               shims/lock.h
               shims/perfmon.h
@@ -101,6 +101,7 @@ if(ENABLE_SWIFT)
                       -fmodule-map-file=${CMAKE_SOURCE_DIR}/dispatch/module.modulemap
                     SWIFT_FLAGS
                       -I ${CMAKE_SOURCE_DIR}
+                      -I/usr/include
                       ${swift_optimization_flags}
                     DEPENDS
                       ${CMAKE_SOURCE_DIR}/dispatch/module.modulemap)

src/Makefile.am

@@ -59,8 +59,8 @@ libdispatch_la_SOURCES=			\
 	shims/atomic_sfb.h		\
 	shims/getprogname.h		\
 	shims/hw_config.h		\
-	shims/linux_stubs.c		\
-	shims/linux_stubs.h		\
+	shims/generic_unix_stubs.c		\
+	shims/generic_unix_stubs.h		\
 	shims/lock.c			\
 	shims/lock.h			\
 	shims/perfmon.h			\

src/block.cpp

@@ -109,7 +109,7 @@ extern "C" {
 // The compiler hides the name of the function it generates, and changes it if
 // we try to reference it directly, but the linker still sees it.
 extern void DISPATCH_BLOCK_SPECIAL_INVOKE(void *)
-#ifdef __linux__
+#if defined(__linux__) || defined(__FreeBSD__)
 		asm("___dispatch_block_create_block_invoke");
 #else
 		asm("____dispatch_block_create_block_invoke");

src/event/event_config.h

@@ -76,16 +76,14 @@
 #if DISPATCH_EVENT_BACKEND_KEVENT
 #	if defined(EV_SET_QOS)
 #		define DISPATCH_USE_KEVENT_QOS 1
-#		ifndef KEVENT_FLAG_IMMEDIATE
-#		define KEVENT_FLAG_IMMEDIATE 0x001
-#		endif
-#		ifndef KEVENT_FLAG_ERROR_EVENTS
-#		define KEVENT_FLAG_ERROR_EVENTS 0x002
-#		endif
 #	else
 #		define DISPATCH_USE_KEVENT_QOS 0
 #	endif
 
+#	ifndef KEVENT_FLAG_ERROR_EVENTS
+#		define KEVENT_FLAG_ERROR_EVENTS 0x002
+#	endif
+
 #	ifdef NOTE_LEEWAY
 #		define DISPATCH_HAVE_TIMER_COALESCING 1
 #   else
@@ -106,6 +104,14 @@
 #	define NOTE_FUNLOCK 0x00000100
 #	endif
 
+// FreeBSD's kevent does not support those
+#	ifndef NOTE_ABSOLUTE
+#	define NOTE_ABSOLUTE 0
+#	endif
+#	ifndef NOTE_EXITSTATUS
+#	define NOTE_EXITSTATUS 0
+#	endif
+
 #	if HAVE_DECL_NOTE_REAP
 #	if defined(NOTE_REAP) && defined(__APPLE__)
 #	undef NOTE_REAP
@@ -146,9 +152,15 @@
 
 #	define DISPATCH_HAVE_TIMER_QOS 0
 #	define DISPATCH_HAVE_TIMER_COALESCING 0
-#	define KEVENT_FLAG_IMMEDIATE 0x001
 #endif // !DISPATCH_EVENT_BACKEND_KEVENT
 
+// These flags are used by dispatch generic code and
+// translated back by the various backends to similar semantics
+// hence must be defined even on non Darwin platforms
+#ifndef KEVENT_FLAG_IMMEDIATE
+#	define KEVENT_FLAG_IMMEDIATE 0x001
+#endif
+
 #ifdef EV_UDATA_SPECIFIC
 #	define DISPATCH_EV_DIRECT		(EV_UDATA_SPECIFIC|EV_DISPATCH)
 #else