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annotate src/os/win32/ngx_atomic.h @ 4412:d620f497c50f

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Copyright updated.
author Maxim Konovalov <maxim@nginx.com>
date Wed, 18 Jan 2012 15:07:43 +0000
parents 7658e9c7e814
children 3d2d3e1cf427
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2 /*
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_ATOMIC_H_INCLUDED_
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9 #define _NGX_ATOMIC_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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16 #define NGX_HAVE_ATOMIC_OPS 1
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18 typedef int32_t ngx_atomic_int_t;
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19 typedef uint32_t ngx_atomic_uint_t;
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20 typedef volatile ngx_atomic_uint_t ngx_atomic_t;
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21 #define NGX_ATOMIC_T_LEN (sizeof("-2147483648") - 1)
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24 #if defined( __WATCOMC__ ) || defined( __BORLANDC__ ) || ( _MSC_VER >= 1300 )
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26 /* the new SDK headers */
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28 #define ngx_atomic_cmp_set(lock, old, set) \
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29 ((ngx_atomic_uint_t) InterlockedCompareExchange((long *) lock, set, old) \
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30 == old)
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32 #else
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34 /* the old MS VC6.0SP2 SDK headers */
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36 #define ngx_atomic_cmp_set(lock, old, set) \
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37 (InterlockedCompareExchange((void **) lock, (void *) set, (void *) old) \
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38 == (void *) old)
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40 #endif
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43 #define ngx_atomic_fetch_add(p, add) InterlockedExchangeAdd((long *) p, add)
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46 #define ngx_memory_barrier()
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49 #if defined( __BORLANDC__ ) || ( __WATCOMC__ < 1230 )
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51 /*
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52 * Borland C++ 5.5 (tasm32) and Open Watcom C prior to 1.3
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53 * do not understand the "pause" instruction
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54 */
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56 #define ngx_cpu_pause()
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57 #else
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58 #define ngx_cpu_pause() __asm { pause }
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59 #endif
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62 void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin);
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64 #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1))
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65 #define ngx_unlock(lock) *(lock) = 0
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68 #endif /* _NGX_ATOMIC_H_INCLUDED_ */