Merge commit '0b2e8253986c5c761129b58cfdac46d204903de1'
[unleashed.git] / include / alloca.h
blob23e890d8e8728e5eacc3f9c9293dda51e5e2279b
1 /*
2 * CDDL HEADER START
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
20 * CDDL HEADER END
23 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
25 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
29 #ifndef _ALLOCA_H
30 #define _ALLOCA_H
32 #include <sys/types.h>
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
39 * Many compilation systems depend upon the use of special functions
40 * built into the the compilation system to handle variable argument
41 * lists and stack allocations. The method to obtain this in SunOS
42 * is to define the feature test macro "__BUILTIN_VA_ARG_INCR" which
43 * enables the following special built-in functions:
44 * __builtin_alloca
45 * __builtin_va_alist
46 * __builtin_va_arg_incr
47 * It is intended that the compilation system define this feature test
48 * macro, not the user of the system.
50 * The tests on the processor type are to provide a transitional period
51 * for existing compilation systems, and may be removed in a future
52 * release.
55 #if defined(__BUILTIN_VA_ARG_INCR) || \
56 defined(__sparc) || defined(__i386) || defined(__amd64)
57 #define alloca(x) __builtin_alloca(x)
59 extern void *__builtin_alloca(size_t);
61 #else
63 extern void *alloca(size_t);
65 #endif /* defined(__BUILTIN_VA_ARG_INCR) || defined(__sparc) ... */
67 #ifdef __cplusplus
69 #endif
71 #endif /* _ALLOCA_H */