From 05eb0f125c709af1a100f4e649524e80743d1d40 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Thu, 17 Oct 2013 01:40:19 +0200
Subject: [PATCH] avutil/log: document log callback thread saftey requirements

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavutil/log.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavutil/log.h b/libavutil/log.h
index d3935da3bdc..55459e811a0 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.
-- 
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