mirror of https://github.com/acidanthera/audk.git
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/** @file
|
|
InterlockedCompareExchange16 function
|
|
|
|
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
|
|
Copyright (c) 2015, Linaro Ltd. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
/**
|
|
Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
|
|
**/
|
|
|
|
__int16
|
|
_InterlockedCompareExchange16 (
|
|
__int16 volatile *Destination,
|
|
__int16 Exchange,
|
|
__int16 Comperand
|
|
);
|
|
|
|
#pragma intrinsic(_InterlockedCompareExchange16)
|
|
|
|
/**
|
|
Performs an atomic compare exchange operation on a 16-bit unsigned integer.
|
|
|
|
Performs an atomic compare exchange operation on the 16-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 16-bit value for the compare exchange
|
|
operation.
|
|
@param CompareValue 16-bit value used in compare operation.
|
|
@param ExchangeValue 16-bit value used in exchange operation.
|
|
|
|
@return The original *Value before exchange.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
InternalSyncCompareExchange16 (
|
|
IN volatile UINT16 *Value,
|
|
IN UINT16 CompareValue,
|
|
IN UINT16 ExchangeValue
|
|
)
|
|
{
|
|
return _InterlockedCompareExchange16 (Value, ExchangeValue, CompareValue);
|
|
}
|