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68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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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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#define NGX_HAVE_ATOMIC_OPS 1
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typedef int32_t ngx_atomic_int_t;
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typedef uint32_t ngx_atomic_uint_t;
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typedef volatile ngx_atomic_uint_t ngx_atomic_t;
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#define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1
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#if defined( __WATCOMC__ ) || defined( __BORLANDC__ ) || ( _MSC_VER >= 1300 )
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/* the new SDK headers */
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#define ngx_atomic_cmp_set(lock, old, set) \
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((ngx_atomic_uint_t) InterlockedCompareExchange((long *) lock, set, old) \
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== old)
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#else
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/* the old MS VC6.0SP2 SDK headers */
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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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#define ngx_atomic_fetch_add(p, add) InterlockedExchangeAdd((long *) p, add)
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#define ngx_memory_barrier()
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#if defined( __BORLANDC__ ) || ( __WATCOMC__ < 1230 )
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/*
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* Borland C++ 5.5 (tasm32) and Open Watcom C prior to 1.3
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* do not understand the "pause" instruction
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*/
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#define ngx_cpu_pause()
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#else
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#define ngx_cpu_pause() __asm { pause }
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#endif
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void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, 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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