Mercurial > hg > nginx

annotate src/core/ngx_spinlock.c @ 7660:d33e17499088

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Version bump.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 26 May 2020 22:03:00 +0300
parents f737e406aa68
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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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
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2 /*
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
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4 * Copyright (C) Nginx, Inc.
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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parents: 435
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5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
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018569a8f09c nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
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018569a8f09c nginx-0.0.7-2004-06-30-19:30:41 import
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8 #include <ngx_config.h>
018569a8f09c nginx-0.0.7-2004-06-30-19:30:41 import
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9 #include <ngx_core.h>
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f2755a2885c8 nginx-0.0.7-2004-06-21-23:22:53 import
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f2755a2885c8 nginx-0.0.7-2004-06-21-23:22:53 import
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9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
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12 void
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3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 563
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13 ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin)
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f2755a2885c8 nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
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14 {
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5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
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5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
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16 #if (NGX_HAVE_ATOMIC_OPS)
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18 ngx_uint_t i, n;
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f2755a2885c8 nginx-0.0.7-2004-06-21-23:22:53 import
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20 for ( ;; ) {
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22 if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) {
3f8a2132b93d nginx-0.3.27-RELEASE import
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23 return;
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24 }
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3f8a2132b93d nginx-0.3.27-RELEASE import
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26 if (ngx_ncpu > 1) {
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3f8a2132b93d nginx-0.3.27-RELEASE import
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28 for (n = 1; n < spin; n <<= 1) {
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30 for (i = 0; i < n; i++) {
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31 ngx_cpu_pause();
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32 }
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34 if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) {
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parents: 563
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35 return;
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36 }
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37 }
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38 }
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parents: 563
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40 ngx_sched_yield();
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41 }
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5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
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5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
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43 #else
5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
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44
6072
f737e406aa68 Core: guard against spinlock usage without atomic ops.
Ruslan Ermilov <ru@nginx.com>
parents: 6016
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45 #if (NGX_THREADS)
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5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
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5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
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47 #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
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5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
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49 #endif
5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
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50
5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
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51 #endif
5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
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52
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53 }