[FFmpeg-devel] [PATCH] avutil/log: make av_log/av_vlog() thread safe

[Michael Niedermayer]

This uses a pthread mutex

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
---
 libavutil/log.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/libavutil/log.c b/libavutil/log.c
index 5ee0c5d..2824ba8 100644
--- a/libavutil/log.c
+++ b/libavutil/log.c
@@ -40,6 +40,10 @@
 #include "internal.h"
 #include "log.h"
 
+#if HAVE_PTHREADS
+#include <pthread.h>
+#endif
+
 #define LINE_SZ 1024
 
 static int av_log_level = AV_LOG_INFO;
@@ -269,8 +273,15 @@ void av_log(void* avcl, int level, const char *fmt, ...)
 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
 {
     void (*log_callback)(void*, int, const char*, va_list) = av_log_callback;
+#if HAVE_PTHREADS
+    static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+    pthread_mutex_lock(&mutex);
+#endif
     if (log_callback)
         log_callback(avcl, level, fmt, vl);
+#if HAVE_PTHREADS
+    pthread_mutex_unlock(&mutex);
+#endif
 }
 
 int av_log_get_level(void)
-- 
1.7.9.5