Mercurial > hg > nginx
annotate src/core/ngx_spinlock.c @ 561:e48ebafc6939 release-0.3.2
nginx-0.3.2-RELEASE import
*) Feature: the Sun Studio 10 C compiler support.
*) Feature: the "proxy_upstream_max_fails",
"proxy_upstream_fail_timeout", "fastcgi_upstream_max_fails", and
"fastcgi_upstream_fail_timeout" directives.
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 12 Oct 2005 13:50:36 +0000 |
parents | 975f62e77f02 |
children | 9c2f3ed7a247 |
rev | line source |
---|---|
441
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
435
diff
changeset
|
1 |
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
435
diff
changeset
|
2 /* |
444
42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents:
441
diff
changeset
|
3 * Copyright (C) Igor Sysoev |
441
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
435
diff
changeset
|
4 */ |
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
435
diff
changeset
|
5 |
373
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
6 |
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
7 #include <ngx_config.h> |
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
8 #include <ngx_core.h> |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
9 |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
10 |
493 | 11 /* |
12 * TODO: the P4 optimized assembler version with the "pause" operation | |
13 */ | |
14 | |
373
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
15 void ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin) |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
16 { |
435
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
17 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
18 #if (NGX_HAVE_ATOMIC_OPS) |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
19 |
373
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
20 ngx_uint_t tries; |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
21 |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
22 tries = 0; |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
23 |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
24 for ( ;; ) { |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
25 |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
26 if (*lock) { |
373
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
27 if (ngx_ncpu > 1 && tries++ < spin) { |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
28 continue; |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
29 } |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
30 |
373
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
31 ngx_sched_yield(); |
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
32 |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
33 tries = 0; |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
34 |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
35 } else { |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
36 if (ngx_atomic_cmp_set(lock, 0, 1)) { |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
37 return; |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
38 } |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
39 } |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
40 } |
435
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
41 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
42 #else |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
43 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
44 #if (NGX_THREADS) |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
45 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
46 #error ngx_spinlock() or ngx_atomic_cmp_set() are not defined ! |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
47 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
48 #endif |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
49 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
50 #endif |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
51 |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
52 } |