Mercurial > hg > nginx-vendor-0-8
view src/core/ngx_spinlock.c @ 412:b246022ef454 NGINX_0_7_18
nginx 0.7.18
*) Change: the "underscores_in_headers" directive; now nginx does not
allows underscores in a client request header line names.
*) Feature: the ngx_http_secure_link_module.
*) Feature: the "real_ip_header" directive supports any header.
*) Feature: the "log_subrequest" directive.
*) Feature: the $realpath_root variable.
*) Feature: the "http_502" and "http_504" parameters of the
"proxy_next_upstream" directive.
*) Bugfix: the "http_503" parameter of the "proxy_next_upstream" or
"fastcgi_next_upstream" directives did not work.
*) Bugfix: nginx might send a "Transfer-Encoding: chunked" heaer line
for HEAD requests.
*) Bugfix: now accept threshold depends on worker_connections.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Mon, 13 Oct 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 }