71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/*
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* Copyright (C) 2013 Internet Systems Consortium, Inc. ("ISC")
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id$ */
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#ifndef ISC_ATOMIC_H
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#define ISC_ATOMIC_H 1
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#include <config.h>
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#include <isc/platform.h>
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#include <isc/types.h>
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/*
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* This routine atomically increments the value stored in 'p' by 'val', and
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* returns the previous value.
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*/
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#ifdef ISC_PLATFORM_HAVEXADD
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static __inline isc_int32_t
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isc_atomic_xadd(isc_int32_t *p, isc_int32_t val) {
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return (isc_int32_t) _InterlockedExchangeAdd((long *)p, (long)val);
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}
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#endif
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#ifdef ISC_PLATFORM_HAVEXADDQ
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static __inline isc_int64_t
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isc_atomic_xaddq(isc_int64_t *p, isc_int64_t val) {
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return (isc_int64_t) _InterlockedExchangeAdd64((__int64 *)p,
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(__int64) val);
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}
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#endif
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/*
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* This routine atomically stores the value 'val' in 'p'.
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*/
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#ifdef ISC_PLATFORM_HAVEATOMICSTORE
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static __inline void
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isc_atomic_store(isc_int32_t *p, isc_int32_t val) {
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(void) _InterlockedExchange((long *)p, (long)val);
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}
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#endif
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/*
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* This routine atomically replaces the value in 'p' with 'val', if the
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* original value is equal to 'cmpval'. The original value is returned in any
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* case.
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*/
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#ifdef ISC_PLATFORM_HAVECMPXCHG
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static __inline isc_int32_t
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isc_atomic_cmpxchg(isc_int32_t *p, isc_int32_t cmpval, isc_int32_t val) {
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/* beware: swap arguments */
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return (isc_int32_t) _InterlockedCompareExchange((long *)p,
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(long)val,
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(long)cmpval);
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}
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#endif
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#endif /* ISC_ATOMIC_H */
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