glibc (2.38)
1 /* Copyright (C) 1992-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #ifndef _ALLOCA_H
19 #define _ALLOCA_H 1
20
21 #include <features.h>
22
23 #define __need_size_t
24 #include <stddef.h>
25
26 __BEGIN_DECLS
27
28 /* Remove any previous definition. */
29 #undef alloca
30
31 /* Allocate a block that will be freed when the calling function exits. */
32 extern void *alloca (size_t __size) __THROW;
33
34 #ifdef __GNUC__
35 # define alloca(size) __builtin_alloca (size)
36 #endif /* GCC. */
37
38 __END_DECLS
39
40 #endif /* alloca.h */
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