# include <unistd.h> /* _POSIX_SPIN_LOCKS */
# include <pthread.h>
-# include <semaphore.h>
+
+/* Unnamed POSIX semaphores not supported on Mac OS X, use Mach semaphores instead */
+# if defined (__APPLE__)
+# include <mach/semaphore.h>
+# include <mach/task.h>
+# else
+# include <semaphore.h>
+# endif
#endif
#define VLC_STATIC_MUTEX PTHREAD_MUTEX_INITIALIZER
typedef pthread_cond_t vlc_cond_t;
#define VLC_STATIC_COND PTHREAD_COND_INITIALIZER
-typedef sem_t vlc_sem_t;
typedef pthread_rwlock_t vlc_rwlock_t;
typedef pthread_key_t vlc_threadvar_t;
typedef struct vlc_timer *vlc_timer_t;
+#if defined (__APPLE__)
+typedef semaphore_t vlc_sem_t;
+#else
+typedef sem_t vlc_sem_t;
+#endif
+
#elif defined( WIN32 )
#if !defined( UNDER_CE )
typedef HANDLE vlc_thread_t;