1 /** @file 2 InterLockedIncrement function 3 4 Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php. 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 16 17 18 /** 19 Performs an atomic increment of an 32-bit unsigned integer. 20 21 Performs an atomic increment of the 32-bit unsigned integer specified by 22 Value and returns the incremented value. The increment operation must be 23 performed using MP safe mechanisms. The state of the return value is not 24 guaranteed to be MP safe. 25 26 @param Value A pointer to the 32-bit value to increment. 27 28 @return The incremented value. 29 30 **/ 31 UINT32 32 EFIAPI 33 InternalSyncIncrement ( 34 IN volatile UINT32 *Value 35 ) 36 { 37 _asm { 38 mov eax, Value 39 lock inc dword ptr [eax] 40 mov eax, [eax] 41 } 42 } 43 44
