f1baef62 |
1 | /** @file\r |
2 | InterlockedCompareExchange32 function\r |
3 | \r |
373ade0e |
4 | Copyright (c) 2006 - 2008, Intel Corporation<BR>\r |
f1baef62 |
5 | All rights reserved. This program and the accompanying materials\r |
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 |
42eedea9 |
15 | /**\r |
16 | Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.\r |
17 | **/\r |
7e43ed89 |
18 | \r |
f1baef62 |
19 | long _InterlockedCompareExchange(\r |
20 | long volatile * Destination,\r |
21 | long Exchange,\r |
22 | long Comperand\r |
23 | );\r |
24 | \r |
25 | #pragma intrinsic(_InterlockedCompareExchange)\r |
26 | \r |
42eedea9 |
27 | /**\r |
28 | Performs an atomic compare exchange operation on a 32-bit unsigned integer.\r |
29 | \r |
30 | Performs an atomic compare exchange operation on the 32-bit unsigned integer\r |
31 | specified by Value. If Value is equal to CompareValue, then Value is set to\r |
32 | ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue,\r |
33 | then Value is returned. The compare exchange operation must be performed using\r |
34 | MP safe mechanisms.\r |
35 | \r |
36 | @param Value A pointer to the 32-bit value for the compare exchange\r |
37 | operation.\r |
38 | @param CompareValue 32-bit value used in compare operation.\r |
39 | @param ExchangeValue 32-bit value used in exchange operation.\r |
40 | \r |
41 | @return The original *Value before exchange.\r |
42 | \r |
43 | **/\r |
f1baef62 |
44 | UINT32\r |
45 | EFIAPI\r |
46 | InternalSyncCompareExchange32 (\r |
47 | IN UINT32 *Value,\r |
48 | IN UINT32 CompareValue,\r |
49 | IN UINT32 ExchangeValue\r |
50 | )\r |
51 | {\r |
52 | return _InterlockedCompareExchange (Value, ExchangeValue, CompareValue);\r |
53 | }\r |
54 | \r |