mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-04 13:23:26 +01:00
49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
|
/** @file
|
||
|
InterlockedCompareExchange32 function
|
||
|
|
||
|
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
|
||
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
||
|
**/
|
||
|
|
||
|
/**
|
||
|
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);
|
||
|
}
|
||
|
|