util-optimize.h File Reference
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Macros | |
| #define | likely(expr) __builtin_expect(!!(expr), 1) |
| #define | unlikely(expr) __builtin_expect(!!(expr), 0) |
| #define | cc_barrier() __asm__ __volatile__("": : :"memory") |
| #define | hw_barrier() __sync_synchronize() |
Detailed Description
Definition in file util-optimize.h.
Macro Definition Documentation
◆ cc_barrier
| #define cc_barrier | ( | ) | __asm__ __volatile__("": : :"memory") |
from http://en.wikipedia.org/wiki/Memory_ordering
C Compiler memory barrier
Definition at line 44 of file util-optimize.h.
◆ hw_barrier
| #define hw_barrier | ( | ) | __sync_synchronize() |
from http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Atomic-Builtins.html
Hardware memory barrier
Definition at line 50 of file util-optimize.h.
◆ likely
| #define likely | ( | expr | ) | __builtin_expect(!!(expr), 1) |
Definition at line 33 of file util-optimize.h.
◆ unlikely
| #define unlikely | ( | expr | ) | __builtin_expect(!!(expr), 0) |
Definition at line 36 of file util-optimize.h.
