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