Mercurial > hg > nginx

annotate src/core/ngx_spinlock.c @ 7690:8253424d1aff

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Added size check to ngx_http_alloc_large_header_buffer(). This ensures that copying won't write more than the buffer size even if the buffer comes from hc->free and it is smaller than the large client header buffer size in the virtual host configuration. This might happen if size of large client header buffers is different in name-based virtual hosts, similarly to the problem with number of buffers fixed in 6926:e662cbf1b932.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 06 Aug 2020 05:02:22 +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>
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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>
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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
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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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5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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018569a8f09c nginx-0.0.7-2004-06-30-19:30:41 import
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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>
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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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9c2f3ed7a247 nginx-0.3.3-RELEASE import
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12 void
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13 ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin)
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14 {
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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)) {
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23 return;
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24 }
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26 if (ngx_ncpu > 1) {
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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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35 return;
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36 }
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37 }
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38 }
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40 ngx_sched_yield();
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41 }
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43 #else
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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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47 #error ngx_spinlock() or ngx_atomic_cmp_set() are not defined !
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49 #endif
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51 #endif
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52
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53 }