Android-x86
Forkexternal/efivar
| 修订版 | cb0b1c30103abc17dbbed14210bbc59a73802206 (tree) |
|---|---|
| 时间 | 2019-01-08 00:30:23 |
| 作者 | Peter Jones <pjones@redh...> |
| Commiter | Peter Jones |
util.h: add unlikely() and likely() macros
Signed-off-by: Peter Jones <pjones@redhat.com>
src/util.h (diff)| @@ -52,6 +52,15 @@ | ||
| 52 | 52 | #define PACKED __attribute__((__packed__)) |
| 53 | 53 | #define VERSION(sym, ver) __asm__(".symver " # sym "," # ver) |
| 54 | 54 | |
| 55 | +#define __branch_check__(x, expect, is_constant) \ | |
| 56 | + __builtin_expect(!!(x), expect) | |
| 57 | +#ifndef likely | |
| 58 | +#define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) | |
| 59 | +#endif | |
| 60 | +#ifndef unlikely | |
| 61 | +#define unlikely(x) (__branch_check__(x, 0, __builtin_constant_p(x))) | |
| 62 | +#endif | |
| 63 | + | |
| 55 | 64 | /* |
| 56 | 65 | * I'm not actually sure when these appear, but they're present in the |
| 57 | 66 | * version in front of me. |
