VirtualBox

source: vbox/trunk/src/VBox/Runtime/win/amd64/ASMAtomicReadU64.asm@ 82477

Last change on this file since 82477 was 76553, checked in by vboxsync, 6 years ago

scm --update-copyright-year

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File size: 1.6 KB
Line 
1;; @file
2; IPRT - ASMAtomicReadU64().
3;
4
5;
6; Copyright (C) 2006-2019 Oracle Corporation
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 (GPL) as published by the Free Software
12; Foundation, in version 2 as it comes in the "COPYING" file of the
13; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
14; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
15;
16; The contents of this file may alternatively be used under the terms
17; of the Common Development and Distribution License Version 1.0
18; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
19; VirtualBox OSE distribution, in which case the provisions of the
20; CDDL are applicable instead of those of the GPL.
21;
22; You may elect to license modified versions of this file under the
23; terms and conditions of either the GPL or the CDDL or both.
24;
25
26
27;*******************************************************************************
28;* Header Files *
29;*******************************************************************************
30%include "iprt/asmdefs.mac"
31
32BEGINCODE
33
34;;
35; Atomically Reads a unsigned 64-bit value.
36;
37; @returns rax Current *pu64 value
38; @param rcx pu64 Pointer to the 64-bit variable to read.
39; The memory pointed to must be writable.
40;
41BEGINPROC_EXPORTED ASMAtomicReadU64
42 mov rax, [rcx]
43 ret
44ENDPROC ASMAtomicReadU64
45
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