VirtualBox

source: vbox/trunk/src/VBox/Runtime/win64/ASMAtomicBitToggle.asm@ 4672

Last change on this file since 4672 was 4071, checked in by vboxsync, 17 years ago

Biggest check-in ever. New source code headers for all (C) innotek files.

File size: 1.1 KB
Line 
1;; @file
2; innotek Portable Runtime - ASMAtomicBitToggle().
3;
4
5;
6; Copyright (C) 2006-2007 innotek GmbH
7;
8; This file is part of VirtualBox Open Source Edition (OSE), as
9; available from http://www.virtualbox.org. This file is free software;
10; you can redistribute it and/or modify it under the terms of the GNU
11; General Public License as published by the Free Software Foundation,
12; in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
13; distribution. VirtualBox OSE is distributed in the hope that it will
14; be useful, but WITHOUT ANY WARRANTY of any kind.
15
16
17;*******************************************************************************
18;* Header Files *
19;*******************************************************************************
20%include "iprt/asmdefs.mac"
21
22BEGINCODE
23
24;;
25; Atomically toggles a bit in a bitmap.
26;
27; @param rcx pvBitmap Pointer to the bitmap.
28; @param edx iBit The bit to test and set.
29BEGINPROC_EXPORTED ASMAtomicBitToggle
30 lock btc [rcx], edx
31 ret
32ENDPROC ASMAtomicBitToggle
33
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