Mercurial > hg > nginx
annotate src/core/ngx_spinlock.c @ 563:9c2f3ed7a247 release-0.3.3
nginx-0.3.3-RELEASE import
*) 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 "$msec" log parameter does not require now the
additional the gettimeofday() system call.
*) Feature: the -t switch now tests the "listen" directives.
*) Bugfix: if the invalid address was specified in the "listen"
directive, then after the -HUP signal nginx left an open socket in
the CLOSED state.
*) Bugfix: the mime type may be incorrectly set to default value for
index file with variable in the name; the bug had appeared in 0.3.0.
*) Feature: the "timer_resolution" directive.
*) Feature: the millisecond "$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 <igor@sysoev.ru> |
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date | Wed, 19 Oct 2005 12:33:58 +0000 |
parents | 975f62e77f02 |
children | 3f8a2132b93d |
rev | line source |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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493 | 11 /* |
12 * TODO: the P4 optimized assembler version with the "pause" operation | |
13 */ | |
14 | |
563 | 15 void |
16 ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin) | |
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17 { |
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19 #if (NGX_HAVE_ATOMIC_OPS) |
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21 ngx_uint_t tries; |
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23 tries = 0; |
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25 for ( ;; ) { |
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27 if (*lock) { |
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28 if (ngx_ncpu > 1 && tries++ < spin) { |
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29 continue; |
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30 } |
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32 ngx_sched_yield(); |
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34 tries = 0; |
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36 } else { |
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37 if (ngx_atomic_cmp_set(lock, 0, 1)) { |
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38 return; |
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39 } |
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40 } |
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41 } |
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42 |
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43 #else |
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45 #if (NGX_THREADS) |
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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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53 } |