audk/OldMdePkg/Library/BaseLib/Ia32/InterlockedDecrement.asm

43 lines
1.2 KiB
NASM

;------------------------------------------------------------------------------
;
; Copyright (c) 2006, Intel Corporation
; 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:
;
; InterlockedDecrement.Asm
;
; Abstract:
;
; InterlockedDecrement function
;
; Notes:
;
;------------------------------------------------------------------------------
.386
.model flat,C
.code
;------------------------------------------------------------------------------
; UINT32
; EFIAPI
; InternalSyncDecrement (
; IN UINT32 *Value
; );
;------------------------------------------------------------------------------
InternalSyncDecrement PROC
mov eax, [esp + 4]
lock dec dword ptr [eax]
mov eax, [eax]
ret
InternalSyncDecrement ENDP
END