mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-24 11:45:27 +01:00
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/** @file
|
|
InterlockedCompareExchange64 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.
|
|
**/
|
|
|
|
__int64 _InterlockedCompareExchange64(
|
|
__int64 volatile * Destination,
|
|
__int64 Exchange,
|
|
__int64 Comperand
|
|
);
|
|
|
|
#pragma intrinsic(_InterlockedCompareExchange64)
|
|
|
|
/**
|
|
Performs an atomic compare exchange operation on a 64-bit unsigned integer.
|
|
|
|
Performs an atomic compare exchange operation on the 64-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 64-bit value for the compare exchange
|
|
operation.
|
|
@param CompareValue 64-bit value used in compare operation.
|
|
@param ExchangeValue 64-bit value used in exchange operation.
|
|
|
|
@return The original *Value before exchange.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
InternalSyncCompareExchange64 (
|
|
IN volatile UINT64 *Value,
|
|
IN UINT64 CompareValue,
|
|
IN UINT64 ExchangeValue
|
|
)
|
|
{
|
|
return _InterlockedCompareExchange64 (Value, ExchangeValue, CompareValue);
|
|
}
|
|
|