annotate src/core/ngx_spinlock.c @ 676:bfa81a0490a2 NGINX_1_3_1

nginx 1.3.1 *) Security: now nginx/Windows ignores trailing dot in URI path component, and does not allow URIs with ":$" in it. Thanks to Vladimir Kochetkov, Positive Research Center. *) Feature: the "proxy_pass", "fastcgi_pass", "scgi_pass", "uwsgi_pass" directives, and the "server" directive inside the "upstream" block, now support IPv6 addresses. *) Feature: the "resolver" directive now support IPv6 addresses and an optional port specification. *) Feature: the "least_conn" directive inside the "upstream" block. *) Feature: it is now possible to specify a weight for servers while using the "ip_hash" directive. *) Bugfix: a segmentation fault might occur in a worker process if the "image_filter" directive was used; the bug had appeared in 1.3.0. *) Bugfix: nginx could not be built with ngx_cpp_test_module; the bug had appeared in 1.1.12. *) Bugfix: access to variables from SSI and embedded perl module might not work after reconfiguration. Thanks to Yichun Zhang. *) Bugfix: in the ngx_http_xslt_filter_module. Thanks to Kuramoto Eiji. *) Bugfix: memory leak if $geoip_org variable was used. Thanks to Denis F. Latypoff. *) Bugfix: in the "proxy_cookie_domain" and "proxy_cookie_path" directives.
author Igor Sysoev <http://sysoev.ru>
date Tue, 05 Jun 2012 00:00:00 +0400
parents d0f7a625f27c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
1
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
2 /*
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
3 * Copyright (C) Igor Sysoev
660
d0f7a625f27c nginx 1.1.14
Igor Sysoev <http://sysoev.ru>
parents: 160
diff changeset
4 * Copyright (C) Nginx, Inc.
0
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
5 */
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
6
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
7
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
8 #include <ngx_config.h>
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
9 #include <ngx_core.h>
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
10
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
11
112
408f195b3482 nginx 0.3.3
Igor Sysoev <http://sysoev.ru>
parents: 42
diff changeset
12 void
160
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
13 ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin)
0
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
14 {
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
15
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
16 #if (NGX_HAVE_ATOMIC_OPS)
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
17
160
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
18 ngx_uint_t i, n;
0
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
19
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
20 for ( ;; ) {
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
21
160
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
22 if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) {
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
23 return;
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
24 }
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
25
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
26 if (ngx_ncpu > 1) {
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
27
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
28 for (n = 1; n < spin; n <<= 1) {
0
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
29
160
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
30 for (i = 0; i < n; i++) {
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
31 ngx_cpu_pause();
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
32 }
0
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
33
160
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
34 if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) {
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
35 return;
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
36 }
0
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
37 }
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
38 }
160
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
39
73e8476f9142 nginx 0.3.27
Igor Sysoev <http://sysoev.ru>
parents: 112
diff changeset
40 ngx_sched_yield();
0
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
41 }
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
42
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
43 #else
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
44
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
45 #if (NGX_THREADS)
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
46
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
47 #error ngx_spinlock() or ngx_atomic_cmp_set() are not defined !
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
48
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
49 #endif
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
50
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
51 #endif
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
52
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
53 }