Mercurial > hg > nginx-vendor-current
view src/core/ngx_spinlock.c @ 642:d3cf6c6b0043 NGINX_1_1_5
nginx 1.1.5
*) Feature: the "uwsgi_buffering" and "scgi_buffering" directives.
Thanks to Peter Smit.
*) Bugfix: non-cacheable responses might be cached if
"proxy_cache_bypass" directive was used.
Thanks to John Ferlito.
*) Bugfix: in HTTP/1.1 support in the ngx_http_proxy_module.
*) Bugfix: cached responses with an empty body were returned
incorrectly; the bug had appeared in 0.8.31.
*) Bugfix: 201 responses of the ngx_http_dav_module were incorrect; the
bug had appeared in 0.8.32.
*) Bugfix: in the "return" directive.
*) Bugfix: the "ssl_session_cache builtin" directive caused segmentation
fault; the bug had appeared in 1.1.1.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Wed, 05 Oct 2011 00:00:00 +0400 |
parents | 73e8476f9142 |
children | d0f7a625f27c |
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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 }