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annotate src/os/win32/ngx_atomic.h @ 493:975f62e77f02 release-0.1.21

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nginx-0.1.21-RELEASE import *) Bugfix: the ngx_http_stub_status_module showed incorrect statistics if "rtsig" method was used or if several worker process ran on SMP. *) Bugfix: nginx could not be built by the icc compiler on Linux or if the zlib-1.2.x library was building from sources. *) Bugfix: nginx could not be built on NetBSD 2.0.
author Igor Sysoev <igor@sysoev.ru>
date Tue, 22 Feb 2005 14:40:13 +0000
parents a88a3e4e158f
children d7c90bb5ce83
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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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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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7 #ifndef _NGX_ATOMIC_H_INCLUDED_
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8 #define _NGX_ATOMIC_H_INCLUDED_
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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15 #define NGX_HAVE_ATOMIC_OPS 1
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17 typedef uint32_t ngx_atomic_int_t;
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18 typedef volatile ngx_atomic_int_t ngx_atomic_t;
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19 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1
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22 #define ngx_atomic_inc(p) InterlockedIncrement((long *) p)
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23 #define ngx_atomic_dec(p) InterlockedDecrement((long *) p)
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26 #if defined( __WATCOMC__ ) || defined( __BORLANDC__ ) || ( _MSC_VER >= 1300 )
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28 /* the new SDK headers */
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30 #define ngx_atomic_cmp_set(lock, old, set) \
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31 (InterlockedCompareExchange((long *) lock, set, old) == old)
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33 #else
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35 /* the old MS VC6.0SP2 SDK headers */
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37 #define ngx_atomic_cmp_set(lock, old, set) \
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38 (InterlockedCompareExchange((void **) lock, (void *) set, (void *) old) \
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39 == (void *) old)
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41 #endif
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44 void ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin);
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46 #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1))
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47 #define ngx_unlock(lock) *(lock) = 0
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50 #endif /* _NGX_ATOMIC_H_INCLUDED_ */