1 files changed, 17 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_threads.h b/source/blender/blenlib/BLI_threads.h
index 9cd801f819d..ec8e567c0ef 100644
--- a/source/blender/blenlib/BLI_threads.h
+++ b/source/blender/blenlib/BLI_threads.h
@@ -37,6 +37,10 @@ extern "C" {
 
 #include <pthread.h>
 
+#ifdef __APPLE__
+#include <libkern/OSAtomic.h>
+#endif
+
 /* for tables, button in UI, etc */
 #define BLENDER_MAX_THREADS     64
 
@@ -92,6 +96,19 @@ void BLI_mutex_lock(ThreadMutex *mutex);
 void BLI_mutex_unlock(ThreadMutex *mutex);
 void BLI_mutex_end(ThreadMutex *mutex);
 
+/* Spin Lock */
+
+#ifdef __APPLE__
+typedef OSSpinLock SpinLock;
+#else
+typedef pthread_spinlock_t SpinLock;
+#endif
+
+void BLI_spin_init(SpinLock *spin);
+void BLI_spin_lock(SpinLock *spin);
+void BLI_spin_unlock(SpinLock *spin);
+void BLI_spin_end(SpinLock *spin);
+
 /* Read/Write Mutex Lock */
 
 #define THREAD_LOCK_READ    1