glib/galloca.h

   1 /* GLIB - Library of useful routines for C programming
   2  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This 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  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GLib Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
  28 #error "Only <glib.h> can be included directly."
  29 #endif
  30
  31 #ifndef __G_ALLOCA_H__
  32 #define __G_ALLOCA_H__
  33
  34 #include <glib/gtypes.h>
  35
  36 #ifdef  __GNUC__
  37 /* GCC does the right thing */
  38 # undef alloca
  39 # define alloca(size)   __builtin_alloca (size)
  40 #elif defined (GLIB_HAVE_ALLOCA_H)
  41 /* a native and working alloca.h is there */
  42 # include <alloca.h>
  43 #else /* !__GNUC__ && !GLIB_HAVE_ALLOCA_H */
  44 # if defined(_MSC_VER) || defined(__DMC__)
  45 #  include <malloc.h>
  46 #  define alloca _alloca
  47 # else /* !_MSC_VER && !__DMC__ */
  48 #  ifdef _AIX
  49 #   pragma alloca
  50 #  else /* !_AIX */
  51 #   ifndef alloca /* predefined by HP cc +Olibcalls */
  52 G_BEGIN_DECLS
  53 char *alloca ();
  54 G_END_DECLS
  55 #   endif /* !alloca */
  56 #  endif /* !_AIX */
  57 # endif /* !_MSC_VER && !__DMC__ */
  58 #endif /* !__GNUC__ && !GLIB_HAVE_ALLOCA_H */
  59
  60 #define g_alloca(size)           alloca (size)
  61 #define g_newa(struct_type, n_structs)  ((struct_type*) g_alloca (sizeof (struct_type) * (gsize) (n_structs)))
  62
  63 #endif /* __G_ALLOCA_H__ */