---
libavutil/thread.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/libavutil/thread.h b/libavutil/thread.h
index 3556544..534085b 100644
--- a/libavutil/thread.h
+++ b/libavutil/thread.h
@@ -39,6 +39,11 @@
#define ff_mutex_unlock pthread_mutex_unlock
#define ff_mutex_destroy pthread_mutex_destroy
+#define AVOnce pthread_once_t
+#define AV_ONCE_INIT PTHREAD_ONCE_INIT
+
+#define ff_thread_once(control, routine) pthread_once(control, routine)
+
#else
#define AVMutex char
@@ -48,6 +53,18 @@
#define ff_mutex_unlock(mutex) (0)
#define ff_mutex_destroy(mutex) (0)
+#define AVOnce char
+#define AV_ONCE_INIT 0
+
+static inline int ff_thread_once(char *control, void (*routine)(void))
+{
+ if (!control) {
+ routine();
+ control = 1;
+ }
+ return 0;
+}
+
#endif
#endif /* AVUTIL_THREAD_H */
--
2.5.0
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