MdePkg/Library/BaseLib/Ebc/Synchronization.c

   1 /** @file
   2   Implementation of synchronization functions on EBC.
   3
   4   Copyright (c) 2006, Intel Corporation<BR>
   5   All rights reserved. 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   Module Name:  Synchronization.c
  14
  15 **/
  16
  17 UINT32
  18 EFIAPI
  19 InternalSyncCompareExchange32 (
  20   IN      volatile UINT32           *Value,
  21   IN      UINT32                    CompareValue,
  22   IN      UINT32                    ExchangeValue
  23   )
  24 {
  25   return *Value != CompareValue ? *Value :
  26            ((*Value = ExchangeValue), CompareValue);
  27 }
  28
  29 UINT64
  30 EFIAPI
  31 InternalSyncCompareExchange64 (
  32   IN      volatile UINT64           *Value,
  33   IN      UINT64                    CompareValue,
  34   IN      UINT64                    ExchangeValue
  35   )
  36 {
  37   return *Value != CompareValue ? *Value :
  38            ((*Value = ExchangeValue), CompareValue);
  39 }
  40
  41 UINT32
  42 EFIAPI
  43 InternalSyncIncrement (
  44   IN      volatile UINT32           *Value
  45   )
  46 {
  47   return ++*Value;
  48 }
  49
  50 UINT32
  51 EFIAPI
  52 InternalSyncDecrement (
  53   IN      volatile UINT32           *Value
  54   )
  55 {
  56   return --*Value;
  57 }