| /* Memory allocation on the stack. |
| |
| Copyright (C) 1995, 1999, 2001-2004, 2006-2007 Free Software |
| Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published |
| by the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public |
| License along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| USA. */ |
| |
| /* Avoid using the symbol _ALLOCA_H here, as Bison assumes _ALLOCA_H |
| means there is a real alloca function. */ |
| #ifndef _GL_ALLOCA_H |
| #define _GL_ALLOCA_H |
| |
| /* alloca (N) returns a pointer to N bytes of memory |
| allocated on the stack, which will last until the function returns. |
| Use of alloca should be avoided: |
| - inside arguments of function calls - undefined behaviour, |
| - in inline functions - the allocation may actually last until the |
| calling function returns, |
| - for huge N (say, N >= 65536) - you never know how large (or small) |
| the stack is, and when the stack cannot fulfill the memory allocation |
| request, the program just crashes. |
| */ |
| |
| #ifndef alloca |
| # ifdef __GNUC__ |
| # define alloca __builtin_alloca |
| # elif defined _AIX |
| # define alloca __alloca |
| # elif defined _MSC_VER |
| # include <malloc.h> |
| # define alloca _alloca |
| # else |
| # include <stddef.h> |
| # ifdef __cplusplus |
| extern "C" |
| # endif |
| void *alloca (size_t); |
| # endif |
| #endif |
| |
| #endif /* _GL_ALLOCA_H */ |
