1 /** 2 InterlockedCompareExchange32 function 3 4 Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 #include "BaseLibInternals.h" 16 17 UINT32 18 EFIAPI 19 InternalSyncCompareExchange32 ( 20 IN volatile UINT32 *Value, 21 IN UINT32 CompareValue, 22 IN UINT32 ExchangeValue 23 ) 24 { 25 _asm { 26 mov ecx, Value 27 mov eax, CompareValue 28 mov edx, ExchangeValue 29 lock cmpxchg [ecx], edx 30 } 31 } 32 33
