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c7f33ca4 1/**\r
2 InterlockedCompareExchange32 function\r
3\r
2c7e5c2f
HT
4 Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR>\r
5 This program and the accompanying materials\r
c7f33ca4 6 are licensed and made available under the terms and conditions of the BSD License\r
7 which accompanies this distribution. The full text of the license may be found at\r
8 http://opensource.org/licenses/bsd-license.php\r
9\r
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
12\r
13**/\r
14\r
15#include "BaseLibInternals.h"\r
16\r
17UINT32\r
18EFIAPI\r
19InternalSyncCompareExchange32 (\r
20 IN volatile UINT32 *Value,\r
21 IN UINT32 CompareValue,\r
22 IN UINT32 ExchangeValue\r
23 )\r
24{\r
25 _asm {\r
26 mov ecx, Value\r
27 mov eax, CompareValue\r
28 mov edx, ExchangeValue\r
29 lock cmpxchg [ecx], edx\r
30 }\r
31}\r
32\r