2004-09-28 16:34:51 +08:00
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/*
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2004-09-30 00:00:49 +08:00
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* Copyright (C) Igor Sysoev
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2004-09-28 16:34:51 +08:00
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*/
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2004-06-30 23:30:41 +08:00
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#ifndef _NGX_ATOMIC_H_INCLUDED_
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#define _NGX_ATOMIC_H_INCLUDED_
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#include <ngx_config.h>
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#include <ngx_core.h>
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2004-09-23 00:18:21 +08:00
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#define NGX_HAVE_ATOMIC_OPS 1
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2004-06-30 23:30:41 +08:00
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#define ngx_atomic_inc(p) InterlockedIncrement((long *) p)
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#if defined( __WATCOMC__ ) || defined( __BORLANDC__ )
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2004-09-23 00:18:21 +08:00
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/* the new SDK headers */
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2004-06-30 23:30:41 +08:00
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#define ngx_atomic_cmp_set(lock, old, set) \
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(InterlockedCompareExchange((long *) lock, set, old) == old)
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#else
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2004-09-23 00:18:21 +08:00
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/* the old MS VC6.0SP2 SDK headers */
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2004-06-30 23:30:41 +08:00
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#define ngx_atomic_cmp_set(lock, old, set) \
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(InterlockedCompareExchange((void **) lock, (void *) set, (void *) old) \
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== (void *) old)
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#endif
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void ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin);
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#define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1))
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#define ngx_unlock(lock) *(lock) = 0
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#endif /* _NGX_ATOMIC_H_INCLUDED_ */
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