/** @file | |
InterlockedCompareExchange32 function | |
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR> | |
This program and the accompanying materials | |
are licensed and made available under the terms and conditions of the BSD License | |
which accompanies this distribution. The full text of the license may be found at | |
http://opensource.org/licenses/bsd-license.php. | |
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
**/ | |
/** | |
Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics. | |
**/ | |
long _InterlockedCompareExchange( | |
long volatile * Destination, | |
long Exchange, | |
long Comperand | |
); | |
#pragma intrinsic(_InterlockedCompareExchange) | |
/** | |
Performs an atomic compare exchange operation on a 32-bit unsigned integer. | |
Performs an atomic compare exchange operation on the 32-bit unsigned integer | |
specified by Value. If Value is equal to CompareValue, then Value is set to | |
ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue, | |
then Value is returned. The compare exchange operation must be performed using | |
MP safe mechanisms. | |
@param Value A pointer to the 32-bit value for the compare exchange | |
operation. | |
@param CompareValue 32-bit value used in compare operation. | |
@param ExchangeValue 32-bit value used in exchange operation. | |
@return The original *Value before exchange. | |
**/ | |
UINT32 | |
EFIAPI | |
InternalSyncCompareExchange32 ( | |
IN volatile UINT32 *Value, | |
IN UINT32 CompareValue, | |
IN UINT32 ExchangeValue | |
) | |
{ | |
return _InterlockedCompareExchange (Value, ExchangeValue, CompareValue); | |
} | |