lavu/threadmessage: add av_thread_message_queue_nb_elems()

2018-04-21 21:42:19 +02:00
parent 02e4970bc9
commit 71fa82bed6
5 changed files with 28 additions and 2 deletions
--- a/libavutil/threadmessage.h
+++ b/libavutil/threadmessage.h
@@ -95,6 +95,14 @@ void av_thread_message_queue_set_err_recv(AVThreadMessageQueue *mq,
 void av_thread_message_queue_set_free_func(AVThreadMessageQueue *mq,
                                           void (*free_func)(void *msg));

+/**
+ * Return the current number of messages in the queue.
+ *
+ * @return the current number of messages or AVERROR(ENOSYS) if lavu was built
+ *         without thread support
+ */
+int av_thread_message_queue_nb_elems(AVThreadMessageQueue *mq);
+
 /**
 * Flush the message queue
 *