ffmpeg | branch: release/4.4 | Andreas Rheinhardt <andreas.rheinha...@outlook.com> | Sun Sep 26 10:56:49 2021 +0200| [ecd4490dd06cccb15bc1a547d15bdbfbd853929c] | committer: Andreas Rheinhardt
avutil/utils: Remove racy check from avutil_version() avutil_version() currently performs several checks before just returning the version. There is a static int that aims to ensure that these tests are run only once. The reason is that there used to be a slightly expensive check, but it has been removed in 92e3a6fdac73f7e1d69d69717219a7538877d7a0. Today running only once is unnecessary and can be counterproductive: GCC 10 optimizes all the actual checks away, but the checks_done variable and the code setting it has been kept. Given that this check is inherently racy (it uses non-atomic variables), it is best to just remove it. Reviewed-by: Paul B Mahol <one...@gmail.com> Reviewed-by: James Almer <jamr...@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com> (cherry picked from commit ff800903747325f15056444c11053279e391d60b) > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ecd4490dd06cccb15bc1a547d15bdbfbd853929c --- libavutil/utils.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/libavutil/utils.c b/libavutil/utils.c index c1cd452eee..ea9b5097b8 100644 --- a/libavutil/utils.c +++ b/libavutil/utils.c @@ -37,10 +37,6 @@ const char *av_version_info(void) unsigned avutil_version(void) { - static int checks_done; - if (checks_done) - return LIBAVUTIL_VERSION_INT; - av_assert0(AV_SAMPLE_FMT_DBLP == 9); av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4); av_assert0(AV_PICTURE_TYPE_BI == 7); @@ -58,7 +54,6 @@ unsigned avutil_version(void) av_log(NULL, AV_LOG_ERROR, "Libavutil has been linked to a broken llrint()\n"); } - checks_done = 1; return LIBAVUTIL_VERSION_INT; } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
