threads: fix a potential race spotted by helgrind.

13 years ago · 55ed91c856
parent 652887d6fd
commit 55ed91c856
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/pthread.c
+++ b/libavcodec/pthread.c
@ -975,9 +975,9 @@ int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
        avctx->get_buffer == avcodec_default_get_buffer) {
        err = avctx->get_buffer(avctx, f);
    } else {
+        pthread_mutex_lock(&p->progress_mutex);
        p->requested_frame = f;
        p->state = STATE_GET_BUFFER;
-        pthread_mutex_lock(&p->progress_mutex);
        pthread_cond_broadcast(&p->progress_cond);

        while (p->state != STATE_SETTING_UP)