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util: add u32ctz() call for determining ctz of uint32_t

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This commit is contained in:
Lennart Poettering 2014-01-30 16:46:48 +01:00
parent 50add2909c
commit ec417ccc27
1 changed files with 12 additions and 0 deletions
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12
src/shared/util.h
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@ -743,7 +743,19 @@ static inline void _reset_umask_(struct _umask_struct_ *s) {
_saved_umask_.quit = true)
static inline unsigned u64log2(uint64_t n) {
#if __SIZEOF_LONG_LONG__ == 8
return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
#else
#error "Wut?"
#endif
}
static inline unsigned u32ctz(uint32_t n) {
#if __SIZEOF_INT__ == 4
return __builtin_ctz(n);
#else
#error "Wut?"
#endif
}
static inline bool logind_running(void) {