u-tools/apps/tar/gnu/alloca.in.h

   1 /* -*- buffer-read-only: t -*- vi: set ro: */
   2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
   3 /* Memory allocation on the stack.
   4
   5    Copyright (C) 1995, 1999, 2001-2004, 2006-2011 Free Software Foundation,
   6    Inc.
   7
   8    This program is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 3, or (at your option)
  11    any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public
  19    License along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  21    USA.  */
  22
  23 /* Avoid using the symbol _ALLOCA_H here, as Bison assumes _ALLOCA_H
  24    means there is a real alloca function.  */
  25 #ifndef _GL_ALLOCA_H
  26 #define _GL_ALLOCA_H
  27
  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.
  37  */
  38
  39 #ifndef alloca
  40 # ifdef __GNUC__
  41 #  define alloca __builtin_alloca
  42 # elif defined _AIX
  43 #  define alloca __alloca
  44 # elif defined _MSC_VER
  45 #  include <malloc.h>
  46 #  define alloca _alloca
  47 # elif defined __DECC && defined __VMS
  48 #  define alloca __ALLOCA
  49 # else
  50 #  include <stddef.h>
  51 #  ifdef  __cplusplus
  52 extern "C"
  53 #  endif
  54 void *alloca (size_t);
  55 # endif
  56 #endif
  57
  58 #endif /* _GL_ALLOCA_H */