Mercurial > hg > nginx-vendor-1-0
view src/core/ngx_spinlock.c @ 614:bb20316269e4 NGINX_0_9_5
nginx 0.9.5
*) Change: now nginx uses a default listen backlog value -1 on
Linux.
Thanks to Andrei Nigmatulin.
*) Feature: the "utf8" parameter of "geoip_country" and "geoip_city"
directives.
Thanks to Denis F. Latypoff.
*) Bugfix: in a default "proxy_redirect" directive if "proxy_pass"
directive has no URI part.
Thanks to Maxim Dounin.
*) Bugfix: an "error_page" directive did not work with nonstandard
error codes; the bug had appeared in 0.8.53.
Thanks to Maxim Dounin.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Mon, 21 Feb 2011 00:00:00 +0300 |
parents | 73e8476f9142 |
children | ad25218fd14b |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin) { #if (NGX_HAVE_ATOMIC_OPS) ngx_uint_t i, n; for ( ;; ) { if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) { return; } if (ngx_ncpu > 1) { for (n = 1; n < spin; n <<= 1) { for (i = 0; i < n; i++) { ngx_cpu_pause(); } if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) { return; } } } ngx_sched_yield(); } #else #if (NGX_THREADS) #error ngx_spinlock() or ngx_atomic_cmp_set() are not defined ! #endif #endif }