projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 9b89163e AB |
1 | /** @file\r |
| 2 | InterlockedCompareExchange16 function\r | |
| 3 | \r | |
| 4cee954e | 4 | Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r |
| 9b89163e AB |
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 |
| 9b89163e AB |
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 |