Mercurial > hg > nginx-vendor-current
annotate src/core/ngx_spinlock.c @ 130:82d695e3d662 NGINX_0_3_12
nginx 0.3.12
*) Security: if nginx was built with the ngx_http_realip_module and the
"satisfy_any on" directive was used, then access and authorization
directives did not work. The ngx_http_realip_module was not built
and is not built by default.
*) Change: the "$time_gmt" variable name was changed to "$time_local".
*) Change: the "proxy_header_buffer_size" and
"fastcgi_header_buffer_size" directives was renamed to the
"proxy_buffer_size" and "fastcgi_buffer_size" directives.
*) Feature: the ngx_http_memcached_module.
*) Feature: the "proxy_buffering" directive.
*) Bugfix: the changes in accept mutex handling when the "rtsig" method
was used; bug appeared in 0.3.0.
*) Bugfix: if the client sent the "Transfer-Encoding: chunked" header
line, then nginx returns the 411 error.
*) Bugfix: if the "auth_basic" directive was inherited from the http
level, then the realm in the "WWW-Authenticate" header line was
without the "Basic realm" text.
*) Bugfix: if the "combined" format was explicitly specified in the
"access_log" directive, then the empty lines was written to the log;
bug appeared in 0.3.8.
*) Bugfix: nginx did not run on the sparc platform under any OS except
Solaris.
*) Bugfix: now it is not necessary to place space between the quoted
string and closing bracket in the "if" directive.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Sat, 26 Nov 2005 00:00:00 +0300 |
parents | 408f195b3482 |
children | 73e8476f9142 |
rev | line source |
---|---|
0 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #include <ngx_config.h> | |
8 #include <ngx_core.h> | |
9 | |
10 | |
42 | 11 /* |
12 * TODO: the P4 optimized assembler version with the "pause" operation | |
13 */ | |
14 | |
112 | 15 void |
16 ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin) | |
0 | 17 { |
18 | |
19 #if (NGX_HAVE_ATOMIC_OPS) | |
20 | |
21 ngx_uint_t tries; | |
22 | |
23 tries = 0; | |
24 | |
25 for ( ;; ) { | |
26 | |
27 if (*lock) { | |
28 if (ngx_ncpu > 1 && tries++ < spin) { | |
29 continue; | |
30 } | |
31 | |
32 ngx_sched_yield(); | |
33 | |
34 tries = 0; | |
35 | |
36 } else { | |
37 if (ngx_atomic_cmp_set(lock, 0, 1)) { | |
38 return; | |
39 } | |
40 } | |
41 } | |
42 | |
43 #else | |
44 | |
45 #if (NGX_THREADS) | |
46 | |
47 #error ngx_spinlock() or ngx_atomic_cmp_set() are not defined ! | |
48 | |
49 #endif | |
50 | |
51 #endif | |
52 | |
53 } |