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annotate src/os/win32/ngx_atomic.h @ 7660:d33e17499088

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Version bump.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 26 May 2020 22:03:00 +0300
parents 2cd019520210
children
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2 /*
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3 * Copyright (C) Igor Sysoev
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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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23
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24 #if defined( __WATCOMC__ ) || defined( __BORLANDC__ ) || defined(__GNUC__) \
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25 || ( _MSC_VER >= 1300 )
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27 /* the new SDK headers */
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29 #define ngx_atomic_cmp_set(lock, old, set) \
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30 ((ngx_atomic_uint_t) InterlockedCompareExchange((long *) lock, set, old) \
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31 == old)
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33 #else
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34
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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 #define ngx_atomic_fetch_add(p, add) InterlockedExchangeAdd((long *) p, add)
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47 #define ngx_memory_barrier()
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49
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50 #if defined( __BORLANDC__ ) || ( __WATCOMC__ < 1230 )
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52 /*
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53 * Borland C++ 5.5 (tasm32) and Open Watcom C prior to 1.3
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54 * do not understand the "pause" instruction
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55 */
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57 #define ngx_cpu_pause()
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58 #else
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59 #define ngx_cpu_pause() __asm { pause }
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60 #endif
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63 void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin);
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65 #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1))
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66 #define ngx_unlock(lock) *(lock) = 0
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69 #endif /* _NGX_ATOMIC_H_INCLUDED_ */