Home | History | Annotate | Download | only in darwin-lib
      1 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
      2 /* Memory allocation on the stack.
      3 
      4    Copyright (C) 1995, 1999, 2001-2004, 2006-2012 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 # else
     56 #  include <stddef.h>
     57 #  ifdef  __cplusplus
     58 extern "C"
     59 #  endif
     60 void *alloca (size_t);
     61 # endif
     62 #endif
     63 
     64 #endif /* _GL_ALLOCA_H */
     65