1 /* Memory allocation on the stack.
3 Copyright (C) 1995, 1999, 2001, 2002, 2003, 2004 Free Software
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published
8 by the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public
17 License along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
21 /* When this file is included, it may be preceded only by preprocessor
22 declarations. Thanks to AIX. Therefore we include it right after
23 "config.h", not later. */
28 /* alloca (N) returns a pointer to N bytes of memory
29 allocated on the stack, which will last until the function returns.
30 Use of alloca should be avoided:
31 - inside arguments of function calls - undefined behaviour,
32 - in inline functions - the allocation may actually last until the
33 calling function returns,
34 - for huge N (say, N >= 65536) - you never know how large (or small)
35 the stack is, and when the stack cannot fulfill the memory allocation
36 request, the program just crashes.
40 # define alloca __builtin_alloca
42 # define alloca __alloca
43 #elif defined _MSC_VER
45 # define alloca _alloca
51 void *alloca (size_t);
54 #endif /* _ALLOCA_H */