Mercurial > hg > nginx-vendor-current
annotate src/core/ngx_spinlock.c @ 112:408f195b3482 NGINX_0_3_3
nginx 0.3.3
*) Change: the "bl" and "af" parameters of the "listen" directive was
renamed to the "backlog" and "accept_filter".
*) Feature: the "rcvbuf" and "sndbuf" parameters of the "listen"
directive.
*) Change: the "$msec" log parameter does not require now the
additional the gettimeofday() system call.
*) Feature: the -t switch now tests the "listen" directives.
*) Bugfix: if the invalid address was specified in the "listen"
directive, then after the -HUP signal nginx left an open socket in
the CLOSED state.
*) Bugfix: the mime type may be incorrectly set to default value for
index file with variable in the name; bug appeared in 0.3.0.
*) Feature: the "timer_resolution" directive.
*) Feature: the millisecond "$upstream_response_time" log parameter.
*) Bugfix: a temporary file with client request body now is removed
just after the response header was transferred to a client.
*) Bugfix: OpenSSL 0.9.6 compatibility.
*) Bugfix: the SSL certificate and key file paths could not be relative.
*) Bugfix: the "ssl_prefer_server_ciphers" directive did not work in
the ngx_imap_ssl_module.
*) Bugfix: the "ssl_protocols" directive allowed to specify the single
protocol only.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Wed, 19 Oct 2005 00:00:00 +0400 |
parents | 41ccba1aba45 |
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 } |