| /** @file | |
| InterlockedDecrement function | |
| Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR> | |
| This program and the accompanying materials | |
| are licensed and made available under the terms and conditions of the BSD License | |
| which accompanies this distribution. The full text of the license may be found at | |
| http://opensource.org/licenses/bsd-license.php. | |
| THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| **/ | |
| /** | |
| Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics. | |
| **/ | |
| long _InterlockedDecrement( | |
| long * lpAddend | |
| ); | |
| #pragma intrinsic(_InterlockedDecrement) | |
| /** | |
| Performs an atomic decrement of an 32-bit unsigned integer. | |
| Performs an atomic decrement of the 32-bit unsigned integer specified by | |
| Value and returns the decrement value. The decrement operation must be | |
| performed using MP safe mechanisms. The state of the return value is not | |
| guaranteed to be MP safe. | |
| @param Value A pointer to the 32-bit value to decrement. | |
| @return The decrement value. | |
| **/ | |
| UINT32 | |
| EFIAPI | |
| InternalSyncDecrement ( | |
| IN volatile UINT32 *Value | |
| ) | |
| { | |
| return _InterlockedDecrement ((long *)(UINTN)(Value)); | |
| } | |