Mercurial > hg > nginx-vendor-0-6
view src/core/ngx_spinlock.c @ 324:f7cd062ee035 NGINX_0_6_6
nginx 0.6.6
*) Feature: the --sysconfdir=PATH option in configure.
*) Feature: named locations.
*) Feature: the $args variable can be set with the "set" directive.
*) Feature: the $is_args variable.
*) Bugfix: fair big weight upstream balancer.
*) Bugfix: if a client has closed connection to mail proxy then nginx
might not close connection to backend.
*) Bugfix: if the same host without specified port was used as backend
for HTTP and HTTPS, then nginx used only one port - 80 or 443.
*) Bugfix: fix building on Solaris/amd64 by Sun Studio 11 and early
versions; bug appeared in 0.6.4.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Mon, 30 Jul 2007 00:00:00 +0400 |
parents | 73e8476f9142 |
children |
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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 }