Mercurial > hg > nginx-quic
diff src/event/ngx_event_spinlock.c @ 363:f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Mon, 21 Jun 2004 19:22:53 +0000 |
parents | |
children |
line wrap: on
line diff
new file mode 100644 --- /dev/null +++ b/src/event/ngx_event_spinlock.c @@ -0,0 +1,26 @@ + + +void _spinlock(ngx_atomic_t *lock) +{ + ngx_int_t tries; + + tries = 0; + + for ( ;; ) { + + if (*lock) { + if (ngx_ncpu > 1 && tries++ < 1000) { + continue; + } + + sched_yield(); + tries = 0; + + } else { + if (ngx_atomic_cmp_set(lock, 0, 1)) { + return; + } + } + } +} +