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authorGanesh Ajjanagadde <gajjanagadde@gmail.com>2015-10-05 01:45:12 -0400
committerMichael Niedermayer <michael@niedermayer.cc>2015-10-05 19:30:20 +0200
commit1d4af04adf99301e21d7364d72f5570f5219083a (patch)
treeb9a530f93e8319bb754096b7e1a3be61e1f9b308 /libavcodec/pngdsp.h
parent6f1ccca4ae3b93b6a2a820a7a0e72081ab35767c (diff)
downloadffmpeg-1d4af04adf99301e21d7364d72f5570f5219083a.tar.gz
avutil/attributes: add av_warn_unused_result
GCC 3.4 introduced an attribute warn_unused_result to warn when a programmer discards the return value. Applying this judiciously across the codebase can help in fixing a lot of problems. At a high level, functions which return error codes should always be checked. More concretely, consider the functions ff_add_format and the like in avfilter/formats.h. A quick examination shows that a large portion of libavfilter fails to handle the associated errors, usually AVERROR(ENOMEM). The above example was where I observed the utility of this, but it should be useful in many places across the code base. Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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