DragonOS/kernel/common/compiler.h
2022-07-17 17:23:56 +08:00

10 lines
248 B
C

#pragma once
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#ifndef barrier
// 内存屏障
#define barrier() __asm__ __volatile__("" :: \
: "memory");
#endif