VirtualBox

source: vbox/trunk/include/iprt/alloca.h@ 82968

Last change on this file since 82968 was 82968, checked in by vboxsync, 5 years ago

Copyright year updates by scm.

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File size: 2.1 KB
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1/** @file
2 * IPRT - alloca().
3 */
4
5/*
6 * Copyright (C) 2006-2020 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#ifndef IPRT_INCLUDED_alloca_h
27#define IPRT_INCLUDED_alloca_h
28#ifndef RT_WITHOUT_PRAGMA_ONCE
29# pragma once
30#endif
31
32#if defined(IN_RC) || defined(IN_RING0_AGNOSTIC)
33# error "No alloca() in raw-mode and agnostic ring-0 context as it may have external dependencies like libgcc."
34#endif
35
36/*
37 * If there are more difficult platforms out there, we'll do OS
38 * specific #ifdefs. But for now we'll just include the headers
39 * which normally contains the alloca() prototype.
40 * When we're in kernel territory it starts getting a bit more
41 * interesting of course...
42 */
43#if defined(IN_RING0) \
44 && ( defined(RT_OS_DARWIN) \
45 || defined(RT_OS_FREEBSD) \
46 || defined(RT_OS_LINUX) \
47 || defined(RT_OS_NETBSD) \
48 || defined(RT_OS_SOLARIS))
49/* ASSUMES GNU C */
50# define alloca(cb) __builtin_alloca(cb)
51
52#else
53# include <stdlib.h>
54# if !defined(RT_OS_DARWIN) && !defined(RT_OS_FREEBSD) && !defined(RT_OS_NETBSD)
55# include <malloc.h>
56# endif
57# if defined(RT_OS_SOLARIS) || defined(RT_OS_LINUX)
58# include <alloca.h>
59# endif
60#endif
61
62#endif /* !IPRT_INCLUDED_alloca_h */
63
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