3 files changed, 43 insertions, 33 deletions
diff --git a/src/base/system.c b/src/base/system.c
index 7f98efe1..1c4d3a48 100644
--- a/src/base/system.c
+++ b/src/base/system.c
@@ -505,18 +505,20 @@ void lock_release(LOCK lock)
 #endif
 }
 
-#if defined(CONF_FAMILY_UNIX)
-void semaphore_init(SEMAPHORE *sem) { sem_init(sem, 0, 0); }
-void semaphore_wait(SEMAPHORE *sem) { sem_wait(sem); }
-void semaphore_signal(SEMAPHORE *sem) { sem_post(sem); }
-void semaphore_destroy(SEMAPHORE *sem) { sem_destroy(sem); }
-#elif defined(CONF_FAMILY_WINDOWS)
-void semaphore_init(SEMAPHORE *sem) { *sem = CreateSemaphore(0, 0, 10000, 0); }
-void semaphore_wait(SEMAPHORE *sem) { WaitForSingleObject((HANDLE)*sem, 0L); }
-void semaphore_signal(SEMAPHORE *sem) { ReleaseSemaphore((HANDLE)*sem, 1, NULL); }
-void semaphore_destroy(SEMAPHORE *sem) { CloseHandle((HANDLE)*sem); }
-#else
-	#error not implemented on this platform
+#if !defined(CONF_PLATFORM_MACOSX)
+	#if defined(CONF_FAMILY_UNIX)
+	void semaphore_init(SEMAPHORE *sem) { sem_init(sem, 0, 0); }
+	void semaphore_wait(SEMAPHORE *sem) { sem_wait(sem); }
+	void semaphore_signal(SEMAPHORE *sem) { sem_post(sem); }
+	void semaphore_destroy(SEMAPHORE *sem) { sem_destroy(sem); }
+	#elif defined(CONF_FAMILY_WINDOWS)
+	void semaphore_init(SEMAPHORE *sem) { *sem = CreateSemaphore(0, 0, 10000, 0); }
+	void semaphore_wait(SEMAPHORE *sem) { WaitForSingleObject((HANDLE)*sem, 0L); }
+	void semaphore_signal(SEMAPHORE *sem) { ReleaseSemaphore((HANDLE)*sem, 1, NULL); }
+	void semaphore_destroy(SEMAPHORE *sem) { CloseHandle((HANDLE)*sem); }
+	#else
+		#error not implemented on this platform
+	#endif
 #endif
 
 
diff --git a/src/base/system.h b/src/base/system.h
index b3588dbf..032cf785 100644
--- a/src/base/system.h
+++ b/src/base/system.h
@@ -403,20 +403,22 @@ void lock_release(LOCK lock);
 
 /* Group: Semaphores */
 
-#if defined(CONF_FAMILY_UNIX)
-	#include <semaphore.h>
-	typedef sem_t SEMAPHORE;
-#elif defined(CONF_FAMILY_WINDOWS)
-	typedef void* SEMAPHORE;
-#else
-	#error missing sempahore implementation
+#if !defined(CONF_PLATFORM_MACOSX)
+	#if defined(CONF_FAMILY_UNIX)
+		#include <semaphore.h>
+		typedef sem_t SEMAPHORE;
+	#elif defined(CONF_FAMILY_WINDOWS)
+		typedef void* SEMAPHORE;
+	#else
+		#error missing sempahore implementation
+	#endif
+
+	void semaphore_init(SEMAPHORE *sem);
+	void semaphore_wait(SEMAPHORE *sem);
+	void semaphore_signal(SEMAPHORE *sem);
+	void semaphore_destroy(SEMAPHORE *sem);
 #endif
 
-void semaphore_init(SEMAPHORE *sem);
-void semaphore_wait(SEMAPHORE *sem);
-void semaphore_signal(SEMAPHORE *sem);
-void semaphore_destroy(SEMAPHORE *sem);
-
 /* Group: Timer */
 #ifdef __GNUC__
 /* if compiled with -pedantic-errors it will complain about long
diff --git a/src/base/tl/threading.h b/src/base/tl/threading.h
index dbf788cd..5caf8588 100644
--- a/src/base/tl/threading.h
+++ b/src/base/tl/threading.h
@@ -58,15 +58,21 @@
 	#error missing atomic implementation for this compiler
 #endif
 
-class semaphore
-{
-	SEMAPHORE sem;
-public:
-	semaphore() { semaphore_init(&sem); }
-	~semaphore() { semaphore_destroy(&sem); }
-	void wait() { semaphore_wait(&sem); }
-	void signal() { semaphore_signal(&sem); }
-};
+#if defined(CONF_PLATFORM_MACOSX)
+	/*
+		use semaphore provided by SDL on macosx
+	*/
+#else
+	class semaphore
+	{
+		SEMAPHORE sem;
+	public:
+		semaphore() { semaphore_init(&sem); }
+		~semaphore() { semaphore_destroy(&sem); }
+		void wait() { semaphore_wait(&sem); }
+		void signal() { semaphore_signal(&sem); }
+	};
+#endif
 
 class lock
 {