Mercurial > hg > nginx
view src/os/unix/ngx_atomic.h @ 473:8e8f3af115b5 release-0.1.11
nginx-0.1.11-RELEASE import
*) Feature: the worker_priority directive.
*) Change: both tcp_nopush and tcp_nodelay directives affect the
transferred response.
*) Bugfix: nginx did not call initgroups().
Thanks to Andrew Sitnikov and Andrei Nigmatulin.
*) Change: now the ngx_http_autoindex_module shows the file size in the
bytes.
*) Bugfix: the ngx_http_autoindex_module returned the 500 error if the
broken symlink was in a directory.
*) Bugfix: the files bigger than 4G could not be transferred using
sendfile.
*) Bugfix: if the backend was resolved to several backends and there
was an error while the response waiting then process may got caught
in an endless loop.
*) Bugfix: the worker process may exit with the "unknown cycle" message
when the /dev/poll method was used.
*) Bugfix: "close() channel failed" errors.
*) Bugfix: the autodetection of the "nobody" and "nogroup" groups.
*) Bugfix: the send_lowat directive did not work on Linux.
*) Bugfix: the segmentation fault occurred if there was no events
section in configuration.
*) Bugfix: nginx could not be built on OpenBSD.
*) Bugfix: the double slashes in "://" in the URI were converted to
":/".
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 02 Dec 2004 18:40:46 +0000 |
parents | 42d11f017717 |
children | 975f62e77f02 |
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/* * Copyright (C) Igor Sysoev */ #ifndef _NGX_ATOMIC_H_INCLUDED_ #define _NGX_ATOMIC_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #if ( __i386__ || __amd64__ ) #define NGX_HAVE_ATOMIC_OPS 1 typedef volatile uint32_t ngx_atomic_t; #if (NGX_SMP) #define NGX_SMP_LOCK "lock;" #else #define NGX_SMP_LOCK #endif static ngx_inline uint32_t ngx_atomic_inc(ngx_atomic_t *value) { uint32_t old; __asm__ volatile ( NGX_SMP_LOCK " xaddl %0, %2; " " incl %0; " : "=q" (old) : "0" (1), "m" (*value)); return old; } #if 0 static ngx_inline uint32_t ngx_atomic_dec(ngx_atomic_t *value) { uint32_t old; __asm__ volatile ( NGX_SMP_LOCK " xaddl %0, %1; " " decl %0; " : "=q" (old) : "0" (-1), "m" (*value)); return old; } #endif static ngx_inline uint32_t ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_t old, ngx_atomic_t set) { uint32_t res; __asm__ volatile ( NGX_SMP_LOCK " cmpxchgl %3, %1; " " setz %%al; " " movzbl %%al, %0; " : "=a" (res) : "m" (*lock), "a" (old), "q" (set)); return res; } #elif ( __sparc__ ) #define NGX_HAVE_ATOMIC_OPS 1 typedef volatile uint32_t ngx_atomic_t; static ngx_inline uint32_t ngx_atomic_inc(ngx_atomic_t *value) { uint32_t old, new, res; old = *value; for ( ;; ) { new = old + 1; res = new; __asm__ volatile ( "casa [%1] 0x80, %2, %0" : "+r" (res) : "r" (value), "r" (old)); if (res == old) { return new; } old = res; } } static ngx_inline uint32_t ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_t old, ngx_atomic_t set) { uint32_t res = (uint32_t) set; __asm__ volatile ( "casa [%1] 0x80, %2, %0" : "+r" (res) : "r" (lock), "r" (old)); return (res == old); } #else #define NGX_HAVE_ATOMIC_OPS 0 typedef volatile uint32_t ngx_atomic_t; #define ngx_atomic_inc(x) ++(*(x)); static ngx_inline uint32_t ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_t old, ngx_atomic_t set) { return 1; } #endif void ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin); #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1)) #define ngx_unlock(lock) *(lock) = 0 #endif /* _NGX_ATOMIC_H_INCLUDED_ */