mirror of https://github.com/acidanthera/audk.git
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/** @file
|
|
Implementation of synchronization functions on Itanium.
|
|
|
|
Copyright (c) 2006, Intel Corporation<BR>
|
|
All rights reserved. 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.
|
|
|
|
Module Name: Synchronization.c
|
|
|
|
**/
|
|
|
|
UINT32
|
|
EFIAPI
|
|
InternalSyncCompareExchange32 (
|
|
IN volatile UINT32 *Value,
|
|
IN UINT32 CompareValue,
|
|
IN UINT32 ExchangeValue
|
|
);
|
|
|
|
UINT32
|
|
EFIAPI
|
|
InternalSyncIncrement (
|
|
IN volatile UINT32 *Value
|
|
)
|
|
{
|
|
UINT32 OriginalValue;
|
|
|
|
do {
|
|
OriginalValue = *Value;
|
|
} while (OriginalValue == InternalSyncCompareExchange32 (
|
|
Value,
|
|
OriginalValue,
|
|
OriginalValue + 1
|
|
));
|
|
return OriginalValue + 1;
|
|
}
|
|
|
|
UINT32
|
|
EFIAPI
|
|
InternalSyncDecrement (
|
|
IN volatile UINT32 *Value
|
|
)
|
|
{
|
|
UINT32 OriginalValue;
|
|
|
|
do {
|
|
OriginalValue = *Value;
|
|
} while (OriginalValue == InternalSyncCompareExchange32 (
|
|
Value,
|
|
OriginalValue,
|
|
OriginalValue - 1
|
|
));
|
|
return OriginalValue - 1;
|
|
}
|