barrier.h

来自「linux 内核源代码」· C头文件 代码 · 共 10 行

#ifndef __SYSDEP_I386_BARRIER_H
#define __SYSDEP_I386_BARRIER_H

/* Copied from include/asm-i386 for use by userspace.  i386 has the option
 * of using mfence, but I'm just using this, which works everywhere, for now.
 */
#define mb() asm volatile("lock; addl $0,0(%esp)")

#endif