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1 | /** @file\r |
2 | InterlockedCompareExchange16 function\r | |
3 | \r | |
4cee954e | 4 | Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r |
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5 | Copyright (c) 2015, Linaro Ltd. All rights reserved.<BR>\r |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php.\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | /**\r | |
17 | Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.\r | |
18 | **/\r | |
19 | \r | |
20 | __int16 _InterlockedCompareExchange16(\r | |
21 | __int16 volatile * Destination,\r | |
22 | __int16 Exchange,\r | |
23 | __int16 Comperand\r | |
24 | );\r | |
25 | \r | |
26 | #pragma intrinsic(_InterlockedCompareExchange16)\r | |
27 | \r | |
28 | /**\r | |
29 | Performs an atomic compare exchange operation on a 16-bit unsigned integer.\r | |
30 | \r | |
31 | Performs an atomic compare exchange operation on the 16-bit unsigned integer specified\r | |
32 | by Value. If Value is equal to CompareValue, then Value is set to ExchangeValue and\r | |
33 | CompareValue is returned. If Value is not equal to CompareValue, then Value is returned.\r | |
34 | The compare exchange operation must be performed using MP safe mechanisms.\r | |
35 | \r | |
36 | @param Value A pointer to the 16-bit value for the compare exchange\r | |
37 | operation.\r | |
38 | @param CompareValue 16-bit value used in compare operation.\r | |
39 | @param ExchangeValue 16-bit value used in exchange operation.\r | |
40 | \r | |
41 | @return The original *Value before exchange.\r | |
42 | \r | |
43 | **/\r | |
44 | UINT16\r | |
45 | EFIAPI\r | |
46 | InternalSyncCompareExchange16 (\r | |
4cee954e | 47 | IN volatile UINT16 *Value,\r |
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48 | IN UINT16 CompareValue,\r |
49 | IN UINT16 ExchangeValue\r | |
50 | )\r | |
51 | {\r | |
52 | return _InterlockedCompareExchange16 (Value, ExchangeValue, CompareValue);\r | |
53 | }\r | |
54 | \r |