avfilter/allfilters: make avfilter_register_all thread safe
authorMuhammad Faiz <mfcc64@gmail.com>
Tue, 7 Mar 2017 08:54:44 +0000 (15:54 +0700)
committerMuhammad Faiz <mfcc64@gmail.com>
Tue, 7 Mar 2017 13:34:44 +0000 (20:34 +0700)
use ff_thread_once

Suggested-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
libavfilter/allfilters.c

index 15a74c4..df1af8d 100644 (file)
@@ -19,6 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/thread.h"
 #include "avfilter.h"
 #include "config.h"
 #include "opencl_allkernels.h"
         avfilter_register(&ff_##x);                                     \
     }
 
-void avfilter_register_all(void)
+static void register_all(void)
 {
-    static int initialized;
-
-    if (initialized)
-        return;
-    initialized = 1;
-
     REGISTER_FILTER(ABENCH,         abench,         af);
     REGISTER_FILTER(ACOMPRESSOR,    acompressor,    af);
     REGISTER_FILTER(ACROSSFADE,     acrossfade,     af);
@@ -380,3 +375,10 @@ void avfilter_register_all(void)
     REGISTER_FILTER_UNCONDITIONAL(vf_fifo);
     ff_opencl_register_filter_kernel_code_all();
 }
+
+void avfilter_register_all(void)
+{
+    AVOnce control = AV_ONCE_INIT;
+
+    ff_thread_once(&control, register_all);
+}