InterlockedCompareExchange32.c File Reference

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Functions
UINT32 EFIAPI	InternalSyncCompareExchange32 (IN volatile UINT32 *Value, IN UINT32 CompareValue, IN UINT32 ExchangeValue)

Detailed Description

InterlockedCompareExchange32 function

Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file InterlockedCompareExchange32.c.

Function Documentation

InternalSyncCompareExchange32()

UINT32 EFIAPI InternalSyncCompareExchange32	(	IN volatile UINT32 *	Value,
		IN UINT32	CompareValue,
		IN UINT32	ExchangeValue
	)

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.

Parameters

Value	A pointer to the 32-bit value for the compare exchange operation.
CompareValue	32-bit value used in compare operation.
ExchangeValue	32-bit value used in exchange operation.

Returns

The original *Value before exchange.

Definition at line 28 of file InterlockedCompareExchange32.c.