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| author | Janne Grunau <janne-libav@jannau.net> | 2014-04-23 12:19:59 +0200 |
|---|---|---|
| committer | Janne Grunau <janne-libav@jannau.net> | 2014-04-24 18:28:26 +0200 |
| commit | a88e1d1c598e641eecd5d43730211d91c82787c6 (patch) | |
| tree | 97659e4d9e5679c7c8cc2703bec2cc6b08e9765e /libavutil/internal.h | |
| parent | 152b797cd687e96a582a1cb908dddf3d330d7637 (diff) | |
| download | ffmpeg-a88e1d1c598e641eecd5d43730211d91c82787c6.tar.gz | |
lavu: add CHK_OFFS as AV_CHECK_OFFSET to check struct member offsets
Diffstat (limited to 'libavutil/internal.h')
| -rw-r--r-- | libavutil/internal.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libavutil/internal.h b/libavutil/internal.h index ecd535b808..210c52437e 100644 --- a/libavutil/internal.h +++ b/libavutil/internal.h @@ -84,6 +84,13 @@ // to be forced to tokenize __VA_ARGS__ #define E1(x) x +/* Check if the hard coded offset of a struct member still matches reality. + * Induce a compilation failure if not. + */ +#define AV_CHECK_OFFSET(s, m, o) struct check_##o { \ + int x_##o[offsetof(s, m) == o? 1: -1]; \ + } + #define LOCAL_ALIGNED_A(a, t, v, s, o, ...) \ uint8_t la_##v[sizeof(t s o) + (a)]; \ t (*v) o = (void *)FFALIGN((uintptr_t)la_##v, a) |