[FFmpeg-cvslog] avutil/log: document log callback thread saftey requirements

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Thu Oct 17 01:40:19 2013 +0200| [05eb0f125c709af1a100f4e649524e80743d1d40] | committer: Michael Niedermayer

avutil/log: document log callback thread saftey requirements

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=05eb0f125c709af1a100f4e649524e80743d1d40
---

 libavutil/log.h |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavutil/log.h b/libavutil/log.h
index d3935da..55459e8 100644
--- a/libavutil/log.h
+++ b/libavutil/log.h
@@ -240,6 +240,9 @@ void av_log_set_level(int level);
 /**
  * Set the logging callback
  *
+ * @note The callback must be thread safe, even if the application does not use
+ *       threads itself as some codecs are multithreaded.
+ *
  * @see av_log_default_callback
  *
  * @param callback A logging function with a compatible signature.