Mercurial > hg > nginx-vendor-0-8
view src/core/ngx_spinlock.c @ 260:0effe91f6083 NGINX_0_5_0
nginx 0.5.0
*) Change: the parameters in the "%name" form in the "log_format"
directive are not supported anymore.
*) Change: the "proxy_upstream_max_fails",
"proxy_upstream_fail_timeout", "fastcgi_upstream_max_fails",
"fastcgi_upstream_fail_timeout", "memcached_upstream_max_fails", and
"memcached_upstream_fail_timeout" directives are not supported
anymore.
*) Feature: the "server" directive in the "upstream" context supports
the "max_fails", "fail_timeout", and "down" parameters.
*) Feature: the "ip_hash" directive inside the "upstream" block.
*) Feature: the WAIT status in the "Auth-Status" header line of the
IMAP/POP3 proxy authentication server response.
*) Bugfix: nginx could not be built on 64-bit platforms; bug appeared
in 0.4.14.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Mon, 04 Dec 2006 00:00:00 +0300 |
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 }