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alloca.h
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1 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
2 /* Memory allocation on the stack.
3
4 Copyright (C) 1995, 1999, 2001-2004, 2006-2016 Free Software Foundation,
5 Inc.
6
7 This program is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published
9 by the Free Software Foundation; either version 3, or (at your option)
10 any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
16
17 You should have received a copy of the GNU General Public
18 License along with this program; if not, see
19 <http://www.gnu.org/licenses/>.
20 */
21
22 /* Avoid using the symbol _ALLOCA_H here, as Bison assumes _ALLOCA_H
23 means there is a real alloca function. */
24 #ifndef _GL_ALLOCA_H
25 #define _GL_ALLOCA_H
26
27 /* alloca (N) returns a pointer to N bytes of memory
28 allocated on the stack, which will last until the function returns.
29 Use of alloca should be avoided:
30 - inside arguments of function calls - undefined behaviour,
31 - in inline functions - the allocation may actually last until the
32 calling function returns,
33 - for huge N (say, N >= 65536) - you never know how large (or small)
34 the stack is, and when the stack cannot fulfill the memory allocation
35 request, the program just crashes.
36 */
37
38 #ifndef alloca
39 # ifdef __GNUC__
40 # define alloca __builtin_alloca
41 # elif defined _AIX
42 # define alloca __alloca
43 # elif defined _MSC_VER
44 # include <malloc.h>
45 # define alloca _alloca
46 # elif defined __DECC && defined __VMS
47 # define alloca __ALLOCA
48 # elif defined __TANDEM && defined _TNS_E_TARGET
49 # ifdef __cplusplus
50 extern "C"
51 # endif
52 void *_alloca (unsigned short);
53 # pragma intrinsic (_alloca)
54 # define alloca _alloca
55 # elif defined __MVS__
56 # include <stdlib.h>
57 # else
58 # include <stddef.h>
59 # ifdef __cplusplus
60 extern "C"
61 # endif
62 void *alloca (size_t);
63 # endif
64 #endif
65
66 #endif /* _GL_ALLOCA_H */
alloca
void * alloca(size_t)
stdlib.h