Mercurial > hg > nginx-ranges
view src/core/ngx_spinlock.c @ 302:9b7db0df50f0 NGINX_0_5_21
nginx 0.5.21
*) Bugfix: if server has more than about ten locations, then regex
locations might be choosen not in that order as they were specified.
*) Bugfix: a worker process may got caught in an endless loop on 64-bit
platform, if the 33-rd or next in succession backend has failed.
Thanks to Anton Povarov.
*) Bugfix: a bus error might occur on Solaris/sparc64 if the PCRE
library was used.
Thanks to Andrei Nigmatulin.
*) Bugfix: in the HTTPS protocol in the "proxy_pass" directive.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Mon, 28 May 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 }