Mercurial > hg > nginx-vendor-current
view src/core/ngx_spinlock.c @ 604:428c6e58046a NGINX_0_9_0
nginx 0.9.0
*) Feature: the "keepalive_disable" directive.
*) Feature: the "map" directive supports variables as value of a
defined variable.
*) Feature: the "map" directive supports empty strings as value of the
first parameter.
*) Feature: the "map" directive supports expressions as the first
parameter.
*) Feature: nginx(8) manual page.
Thanks to Sergey Osokin.
*) Feature: Linux accept4() support.
Thanks to Simon Liu.
*) Workaround: elimination of Linux linker warning about "sys_errlist"
and "sys_nerr"; the warning had appeared in 0.8.35.
*) Bugfix: a segmentation fault might occur in a worker process, if the
"auth_basic" directive was used.
Thanks to Michail Laletin.
*) Bugfix: compatibility with ngx_http_eval_module; the bug had
appeared in 0.8.42.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Mon, 29 Nov 2010 00:00:00 +0300 |
parents | 73e8476f9142 |
children | d0f7a625f27c |
line wrap: on
line source
/* * 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 }