Mercurial > hg > nginx-vendor-0-8
view src/core/ngx_spinlock.c @ 54:bcb5fce0b038 NGINX_0_1_27
nginx 0.1.27
*) Feature: the "blocked" parameter of the "valid_referers" directive.
*) Change: the errors while handling the request header now logged at
"info" level. The server name and the "Host" and "Referer" header
lines also logged.
*) Change: the "Host" header line is also logged in error log.
*) Feature: the proxy_pass_unparsed_uri directive. The special handling
of the "://" symbols in URI, appeared in 0.1.11 version, now is
canceled.
*) Bugfix: nginx could not be built on FreeBSD and Linux, if the
--without-ngx_http_auth_basic_module configuration parameter was
used.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Mon, 28 Mar 2005 00:00:00 +0400 |
parents | 41ccba1aba45 |
children | 408f195b3482 |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> /* * TODO: the P4 optimized assembler version with the "pause" operation */ void ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin) { #if (NGX_HAVE_ATOMIC_OPS) ngx_uint_t tries; tries = 0; for ( ;; ) { if (*lock) { if (ngx_ncpu > 1 && tries++ < spin) { continue; } ngx_sched_yield(); tries = 0; } else { if (ngx_atomic_cmp_set(lock, 0, 1)) { return; } } } #else #if (NGX_THREADS) #error ngx_spinlock() or ngx_atomic_cmp_set() are not defined ! #endif #endif }