/*
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* Copyright (c) 2003-2011 Hewlett-Packard Development Company, L.P.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/* This file contains AO primitives based on VC++ built-in intrinsic */
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/* functions commonly available across 32-bit architectures. */
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/* This file should be included from arch-specific header files. */
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/* Define AO_USE_INTERLOCKED_INTRINSICS if _Interlocked primitives */
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/* (used below) are available as intrinsic ones for a target arch */
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/* (otherwise "Interlocked" functions family is used instead). */
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/* Define AO_ASSUME_WINDOWS98 if CAS is available. */
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#include <windows.h>
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/* Seems like over-kill, but that's what MSDN recommends. */
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/* And apparently winbase.h is not always self-contained. */
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#if _MSC_VER < 1310 || !defined(AO_USE_INTERLOCKED_INTRINSICS)
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# define _InterlockedIncrement InterlockedIncrement
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# define _InterlockedDecrement InterlockedDecrement
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# define _InterlockedExchangeAdd InterlockedExchangeAdd
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# define _InterlockedCompareExchange InterlockedCompareExchange
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# define AO_INTERLOCKED_VOLATILE /**/
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#else /* elif _MSC_VER >= 1310 */
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# if _MSC_VER >= 1400
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# ifndef _WIN32_WCE
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# include <intrin.h>
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# endif
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# else /* elif _MSC_VER < 1400 */
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# ifdef __cplusplus
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extern "C" {
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# endif
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LONG __cdecl _InterlockedIncrement(LONG volatile *);
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LONG __cdecl _InterlockedDecrement(LONG volatile *);
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LONG __cdecl _InterlockedExchangeAdd(LONG volatile *, LONG);
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LONG __cdecl _InterlockedCompareExchange(LONG volatile *,
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LONG /* Exchange */, LONG /* Comp */);
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# ifdef __cplusplus
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}
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# endif
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# endif /* _MSC_VER < 1400 */
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# if !defined(AO_PREFER_GENERALIZED) || !defined(AO_ASSUME_WINDOWS98)
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# pragma intrinsic (_InterlockedIncrement)
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# pragma intrinsic (_InterlockedDecrement)
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# pragma intrinsic (_InterlockedExchangeAdd)
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# endif /* !AO_PREFER_GENERALIZED */
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# pragma intrinsic (_InterlockedCompareExchange)
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# define AO_INTERLOCKED_VOLATILE volatile
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#endif /* _MSC_VER >= 1310 */
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#if !defined(AO_PREFER_GENERALIZED) || !defined(AO_ASSUME_WINDOWS98)
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AO_INLINE AO_t
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AO_fetch_and_add_full(volatile AO_t *p, AO_t incr)
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{
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return _InterlockedExchangeAdd((LONG AO_INTERLOCKED_VOLATILE *)p,
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(LONG)incr);
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}
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#define AO_HAVE_fetch_and_add_full
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AO_INLINE AO_t
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AO_fetch_and_add1_full(volatile AO_t *p)
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{
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return _InterlockedIncrement((LONG AO_INTERLOCKED_VOLATILE *)p) - 1;
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}
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#define AO_HAVE_fetch_and_add1_full
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AO_INLINE AO_t
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AO_fetch_and_sub1_full(volatile AO_t *p)
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{
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return _InterlockedDecrement((LONG AO_INTERLOCKED_VOLATILE *)p) + 1;
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}
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#define AO_HAVE_fetch_and_sub1_full
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#endif /* !AO_PREFER_GENERALIZED */
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#ifdef AO_ASSUME_WINDOWS98
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AO_INLINE AO_t
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AO_fetch_compare_and_swap_full(volatile AO_t *addr, AO_t old_val,
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AO_t new_val)
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{
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# ifdef AO_OLD_STYLE_INTERLOCKED_COMPARE_EXCHANGE
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return (AO_t)_InterlockedCompareExchange(
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(PVOID AO_INTERLOCKED_VOLATILE *)addr,
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(PVOID)new_val, (PVOID)old_val);
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# else
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return (AO_t)_InterlockedCompareExchange(
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(LONG AO_INTERLOCKED_VOLATILE *)addr,
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(LONG)new_val, (LONG)old_val);
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# endif
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}
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# define AO_HAVE_fetch_compare_and_swap_full
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#endif /* AO_ASSUME_WINDOWS98 */
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