diff options
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) |