Mercurial > hg > nginx-vendor-0-7
view src/core/ngx_spinlock.c @ 400:6ebbca3d5ed7 NGINX_0_7_12
nginx 0.7.12
*) Feature: the "server_name" directive supports empty name "".
*) Feature: the "gzip_disable" directive supports special "msie6" mask.
*) Bugfix: if the "max_fails=0" parameter was used in upstream with
several servers, then a worker process exited on a SIGFPE signal.
Thanks to Maxim Dounin.
*) Bugfix: a request body was dropped while redirection via an
"error_page" directive.
*) Bugfix: a full response was returned for request method HEAD while
redirection via an "error_page" directive.
*) Bugfix: the $r->header_in() method did not return value of the
"Host", "User-Agent", and "Connection" request header lines; the bug
had appeared in 0.7.0.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Tue, 26 Aug 2008 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 }