diff options
Diffstat (limited to 'internal.h')
| -rw-r--r-- | internal.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/internal.h b/internal.h index ddb59d64b3..a057b20ab0 100644 --- a/internal.h +++ b/internal.h @@ -19,6 +19,27 @@ extern "C" { #endif #endif +/* likely */ +#if __GNUC__ >= 3 +#define LIKELY(x) (__builtin_expect((x), 1)) +#define UNLIKELY(x) (__builtin_expect((x), 0)) +#else /* __GNUC__ >= 3 */ +#define LIKELY(x) (x) +#define UNLIKELY(x) (x) +#endif /* __GNUC__ >= 3 */ + +#ifndef __has_attribute +# define __has_attribute(x) 0 +#endif + +#if __has_attribute(unused) +#define UNINITIALIZED_VAR(x) x __attribute__((unused)) +#elif defined(__GNUC__) && __GNUC__ >= 3 +#define UNINITIALIZED_VAR(x) x = x +#else +#define UNINITIALIZED_VAR(x) x +#endif + #ifdef HAVE_VALGRIND_MEMCHECK_H # include <valgrind/memcheck.h> # ifndef VALGRIND_MAKE_MEM_DEFINED |