+++ /dev/null
-/** @file\r
- Implementation of synchronization functions on Itanium.\r
-\r
- Copyright (c) 2006, Intel Corporation<BR>\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
- Module Name: Synchronization.c\r
-\r
-**/\r
-\r
-#include "BaseLibInternals.h"\r
-\r
-/**\r
- Performs an atomic increment of an 32-bit unsigned integer.\r
-\r
- Performs an atomic increment of the 32-bit unsigned integer specified by\r
- Value and returns the incremented value. The increment operation must be\r
- performed using MP safe mechanisms. The state of the return value is not\r
- guaranteed to be MP safe.\r
-\r
- @param Value A pointer to the 32-bit value to increment.\r
-\r
- @return The incremented value.\r
-\r
-**/\r
-UINT32\r
-EFIAPI\r
-InternalSyncIncrement (\r
- IN volatile UINT32 *Value\r
- )\r
-{\r
- UINT32 OriginalValue;\r
-\r
- do {\r
- OriginalValue = *Value;\r
- } while (OriginalValue != InternalSyncCompareExchange32 (\r
- Value,\r
- OriginalValue,\r
- OriginalValue + 1\r
- ));\r
- return OriginalValue + 1;\r
-}\r
-\r
-/**\r
- Performs an atomic decrement of an 32-bit unsigned integer.\r
-\r
- Performs an atomic decrement of the 32-bit unsigned integer specified by\r
- Value and returns the decrement value. The decrement operation must be\r
- performed using MP safe mechanisms. The state of the return value is not\r
- guaranteed to be MP safe.\r
-\r
- @param Value A pointer to the 32-bit value to decrement.\r
-\r
- @return The decrement value.\r
-\r
-**/\r
-UINT32\r
-EFIAPI\r
-InternalSyncDecrement (\r
- IN volatile UINT32 *Value\r
- )\r
-{\r
- UINT32 OriginalValue;\r
-\r
- do {\r
- OriginalValue = *Value;\r
- } while (OriginalValue != InternalSyncCompareExchange32 (\r
- Value,\r
- OriginalValue,\r
- OriginalValue - 1\r
- ));\r
- return OriginalValue - 1;\r
-}\r