Mercurial > hg > nginx-ranges
view src/core/ngx_spinlock.c @ 495:6484cbba0222 NGINX_0_7_55
nginx 0.7.55
*) Bugfix: the http_XXX parameters in "proxy_cache_use_stale" and
"fastcgi_cache_use_stale" directives did not work.
*) Bugfix: fastcgi cache did not cache header only responses.
*) Bugfix: of "select() failed (9: Bad file descriptor)" error in
nginx/Unix and "select() failed (10022: ...)" error in nginx/Windows.
*) Bugfix: a segmentation fault might occur in worker process, if an
"debug_connection" directive was used; the bug had appeared in
0.7.54.
*) Bugfix: fix ngx_http_image_filter_module building errors.
*) Bugfix: the files bigger than 2G could not be transferred using
$r->sendfile.
Thanks to Maxim Dounin.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Wed, 06 May 2009 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 }