Mercurial > hg > nginx
view src/core/ngx_spinlock.c @ 373:018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 30 Jun 2004 15:30:41 +0000 |
parents | src/event/ngx_event_spinlock.c@f2755a2885c8 |
children | 5cdc4838d4e8 |
line wrap: on
line source
#include <ngx_config.h> #include <ngx_core.h> void ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin) { ngx_uint_t tries; tries = 0; for ( ;; ) { if (*lock) { if (ngx_ncpu > 1 && tries++ < spin) { continue; } ngx_sched_yield(); tries = 0; } else { if (ngx_atomic_cmp_set(lock, 0, 1)) { return; } } } }