stdlib/alloca.h

   1 /* Copyright (C) 1992, 1996 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef _ALLOCA_H
  20 #define _ALLOCA_H       1
  21
  22 #include <features.h>
  23
  24 #define __need_size_t
  25 #include <stddef.h>
  26
  27 __BEGIN_DECLS
  28
  29 /* Remove any previous definitions.  */
  30 #undef  __alloca
  31 #undef  alloca
  32
  33 /* Allocate a block that will be freed when the calling function exits.  */
  34 extern __ptr_t __alloca __P ((size_t __size));
  35 extern __ptr_t alloca __P ((size_t __size));
  36
  37 #ifdef  __GNUC__
  38 #define __alloca(size)  __builtin_alloca(size)
  39 #endif /* GCC.  */
  40
  41 #define alloca(size)    __alloca(size)
  42
  43 __END_DECLS
  44
  45 #endif /* alloca.h */