1 | /* DO NOT EDIT! GENERATED AUTOMATICALLY! */ |
2 | /* Memory allocation on the stack. |
3 | |
4 | Copyright (C) 1995, 1999, 2001-2004, 2006-2019 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 | <https://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 | /* Some version of mingw have an <alloca.h> that causes trouble when |
41 | included after 'alloca' gets defined as a macro. As a workaround, include |
42 | this <alloca.h> first and define 'alloca' as a macro afterwards. */ |
43 | # if (defined _WIN32 && ! defined __CYGWIN__) && 1 |
44 | # include_next <alloca.h> |
45 | # endif |
46 | # define alloca __builtin_alloca |
47 | # elif defined _AIX |
48 | # define alloca __alloca |
49 | # elif defined _MSC_VER |
50 | # include <malloc.h> |
51 | # define alloca _alloca |
52 | # elif defined __DECC && defined __VMS |
53 | # define alloca __ALLOCA |
54 | # elif defined __TANDEM && defined _TNS_E_TARGET |
55 | # ifdef __cplusplus |
56 | extern "C" |
57 | # endif |
58 | void *_alloca (unsigned short); |
59 | # pragma intrinsic (_alloca) |
60 | # define alloca _alloca |
61 | # elif defined __MVS__ |
62 | # include <stdlib.h> |
63 | # else |
64 | # include <stddef.h> |
65 | # ifdef __cplusplus |
66 | extern "C" |
67 | # endif |
68 | void *alloca (size_t); |
69 | # endif |
70 | #endif |
71 | |
72 | #endif /* _GL_ALLOCA_H */ |
73 | |