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Diffstat (limited to '')
| -rw-r--r-- | include/iprt/alloca.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/include/iprt/alloca.h b/include/iprt/alloca.h new file mode 100644 index 00000000..fe7d079d --- /dev/null +++ b/include/iprt/alloca.h @@ -0,0 +1,63 @@ +/** @file + * IPRT - alloca(). + */ + +/* + * Copyright (C) 2006-2020 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + +#ifndef IPRT_INCLUDED_alloca_h +#define IPRT_INCLUDED_alloca_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#if defined(IN_RC) || defined(IN_RING0_AGNOSTIC) +# error "No alloca() in raw-mode and agnostic ring-0 context as it may have external dependencies like libgcc." +#endif + +/* + * If there are more difficult platforms out there, we'll do OS + * specific #ifdefs. But for now we'll just include the headers + * which normally contains the alloca() prototype. + * When we're in kernel territory it starts getting a bit more + * interesting of course... + */ +#if defined(IN_RING0) \ + && ( defined(RT_OS_DARWIN) \ + || defined(RT_OS_FREEBSD) \ + || defined(RT_OS_LINUX) \ + || defined(RT_OS_NETBSD) \ + || defined(RT_OS_SOLARIS)) +/* ASSUMES GNU C */ +# define alloca(cb) __builtin_alloca(cb) + +#else +# include <stdlib.h> +# if !defined(RT_OS_DARWIN) && !defined(RT_OS_FREEBSD) && !defined(RT_OS_NETBSD) +# include <malloc.h> +# endif +# if defined(RT_OS_SOLARIS) || defined(RT_OS_LINUX) +# include <alloca.h> +# endif +#endif + +#endif /* !IPRT_INCLUDED_alloca_h */ + |