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utils: add BUILD_BUG_ON (similar to the one in the linux kernel)

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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
This commit is contained in:
Felix Fietkau 2013-01-01 16:10:27 +01:00
parent 7a117988d9
commit 7157c3a4df
1 changed files with 14 additions and 0 deletions
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14
utils.h
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@ -38,4 +38,18 @@ void *__calloc_a(size_t len, ...);
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#endif #endif
#define __BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
#ifdef __OPTIMIZE__
extern int __BUILD_BUG_ON_CONDITION_FAILED;
#define BUILD_BUG_ON(condition) \
do { \
__BUILD_BUG_ON(condition); \
if (condition) \
__BUILD_BUG_ON_CONDITION_FAILED = 1; \
} while(0)
#else
#define BUILD_BUG_ON __BUILD_BUG_ON
#endif
#endif #endif