4 files changed, 87 insertions, 4 deletions
diff --git a/src/jthread/jevent.h b/src/jthread/jevent.h
index d31d8e654..f97e09ca0 100644
--- a/src/jthread/jevent.h
+++ b/src/jthread/jevent.h
@@ -30,6 +30,11 @@
 
 #ifdef _WIN32
 #include <windows.h>
+#elif __MACH__
+#include <mach/mach.h>
+#include <mach/task.h>
+#include <mach/semaphore.h>
+#include <sys/semaphore.h>
 #else
 #include <semaphore.h>
 #endif
@@ -38,6 +43,8 @@
 class Event {
 #ifdef _WIN32
 	HANDLE hEvent;
+#elif __MACH__
+	semaphore_t sem;
 #else
 	sem_t sem;
 #endif
diff --git a/src/jthread/jsemaphore.h b/src/jthread/jsemaphore.h
index bdce2e4ae..53538da1c 100644
--- a/src/jthread/jsemaphore.h
+++ b/src/jthread/jsemaphore.h
@@ -24,6 +24,14 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <windows.h>
 #include <assert.h>
 #define MAX_SEMAPHORE_COUNT 1024
+#elif __MACH__
+#include <pthread.h>
+#include <mach/mach.h>
+#include <mach/task.h>
+#include <mach/semaphore.h>
+#include <sys/semaphore.h>
+#include <errno.h>
+#include <time.h>
 #else
 #include <pthread.h>
 #include <semaphore.h>
@@ -44,9 +52,13 @@ public:
 private:
 #if defined(WIN32)
 	HANDLE m_hSemaphore;
+#elif __MACH__
+	semaphore_t m_semaphore;
 #else
 	sem_t m_semaphore;
 #endif
+    int semcount;
 };
 
+
 #endif /* JSEMAPHORE_H_ */
diff --git a/src/jthread/pthread/jevent.cpp b/src/jthread/pthread/jevent.cpp
index 26a6fb05c..6a45a37d2 100644
--- a/src/jthread/pthread/jevent.cpp
+++ b/src/jthread/pthread/jevent.cpp
@@ -29,6 +29,19 @@
 
 #define UNUSED(expr) do { (void)(expr); } while (0)
 
+#ifdef __MACH__
+#undef sem_t
+#define sem_t semaphore_t
+#undef sem_init
+#define sem_init(s, p, c) semaphore_create(mach_task_self(), (s), 0, (c))
+#undef sem_wait
+#define sem_wait(s) semaphore_wait(*(s))
+#undef sem_post
+#define sem_post(s) semaphore_signal(*(s))
+#undef sem_destroy
+#define sem_destroy(s) semaphore_destroy(mach_task_self(), *(s))
+#endif
+
 Event::Event() {
 	int sem_init_retval = sem_init(&sem, 0, 0);
 	assert(sem_init_retval == 0);
diff --git a/src/jthread/pthread/jsemaphore.cpp b/src/jthread/pthread/jsemaphore.cpp
index ee1431065..f6d7f022f 100644
--- a/src/jthread/pthread/jsemaphore.cpp
+++ b/src/jthread/pthread/jsemaphore.cpp
@@ -20,13 +20,33 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <errno.h>
 #include <sys/time.h>
 #include "jthread/jsemaphore.h"
+#ifdef __MACH__
+#include <unistd.h>
+#endif
 
 #define UNUSED(expr) do { (void)(expr); } while (0)
 
+#ifdef __MACH__
+#undef sem_t
+#undef sem_init
+#undef sem_wait
+#undef sem_post
+#undef sem_destroy
+#define sem_t             semaphore_t
+#define sem_init(s, p, c) semaphore_create(mach_task_self(), (s), 0, (c))
+#define sem_wait(s)       semaphore_wait(*(s))
+#define sem_post(s)       semaphore_signal(*(s))
+#define sem_destroy(s)    semaphore_destroy(mach_task_self(), *(s))
+pthread_mutex_t semcount_mutex;
+#endif
+
 JSemaphore::JSemaphore() {
 	int sem_init_retval = sem_init(&m_semaphore,0,0);
 	assert(sem_init_retval == 0);
 	UNUSED(sem_init_retval);
+#ifdef __MACH__
+	semcount = 0;
+#endif
 }
 
 JSemaphore::~JSemaphore() {
@@ -45,16 +65,32 @@ void JSemaphore::Post() {
 	int sem_post_retval = sem_post(&m_semaphore);
 	assert(sem_post_retval == 0);
 	UNUSED(sem_post_retval);
+#ifdef __MACH__
+	pthread_mutex_lock(&semcount_mutex);
+	semcount++;
+	pthread_mutex_unlock(&semcount_mutex);
+#endif
 }
 
 void JSemaphore::Wait() {
 	int sem_wait_retval = sem_wait(&m_semaphore);
 	assert(sem_wait_retval == 0);
 	UNUSED(sem_wait_retval);
+#ifdef __MACH__
+	pthread_mutex_lock(&semcount_mutex);
+	semcount--;
+	pthread_mutex_unlock(&semcount_mutex);
+#endif
 }
 
 bool JSemaphore::Wait(unsigned int time_ms) {
+#ifdef __MACH__
+	mach_timespec_t waittime;
+	waittime.tv_sec = time_ms / 1000;
+	waittime.tv_nsec = 1000000 * (time_ms % 1000);
+#else
 	struct timespec waittime;
+#endif
 	struct timeval now;
 
 	if (gettimeofday(&now, NULL) == -1) {
@@ -62,15 +98,26 @@ bool JSemaphore::Wait(unsigned int time_ms) {
 		return false;
 	}
 
+#ifndef __MACH__
 	waittime.tv_nsec = ((time_ms % 1000) * 1000 * 1000) + (now.tv_usec * 1000);
 	waittime.tv_sec  = (time_ms / 1000) + (waittime.tv_nsec / (1000*1000*1000)) + now.tv_sec;
 	waittime.tv_nsec %= 1000*1000*1000;
+#endif
 
 	errno = 0;
-	int sem_wait_retval = sem_timedwait(&m_semaphore,&waittime);
+#ifdef __MACH__
+	int sem_wait_retval = semaphore_timedwait(m_semaphore, waittime);
+#else
+	int sem_wait_retval = sem_timedwait(&m_semaphore, &waittime);
+#endif
 
 	if (sem_wait_retval == 0)
 	{
+#ifdef __MACH__
+		pthread_mutex_lock(&semcount_mutex);
+		semcount--;
+		pthread_mutex_unlock(&semcount_mutex);
+#endif
 		return true;
 	}
 	else {
@@ -81,10 +128,14 @@ bool JSemaphore::Wait(unsigned int time_ms) {
 }
 
 int JSemaphore::GetValue() {
-
 	int retval = 0;
-	sem_getvalue(&m_semaphore,&retval);
-
+#ifdef __MACH__
+	pthread_mutex_lock(&semcount_mutex);
+	retval = semcount;
+	pthread_mutex_unlock(&semcount_mutex);
+#else
+	sem_getvalue(&m_semaphore, &retval);
+#endif
 	return retval;
 }