1/* Emulate getpagesize on systems that lack it.
2   Copyright (C) 1986, 1992, 1995, 2001, 2002, 2003, 2004,
3                 2005, 2006, 2007 Free Software Foundation, Inc.
4
5This file is part of GNU Emacs.
6
7GNU Emacs is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU Emacs is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU Emacs; see the file COPYING.  If not, write to
19the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20Boston, MA 02110-1301, USA.  */
21
22#ifndef HAVE_GETPAGESIZE
23
24# ifdef VMS
25#  define getpagesize() 512
26# endif
27
28# ifdef HAVE_UNISTD_H
29#  include <unistd.h>
30# endif
31
32# ifdef _SC_PAGESIZE
33#  define getpagesize() sysconf(_SC_PAGESIZE)
34# else /* no _SC_PAGESIZE */
35#  ifdef HAVE_SYS_PARAM_H
36#   include <sys/param.h>
37#   ifdef EXEC_PAGESIZE
38#    define getpagesize() EXEC_PAGESIZE
39#   else /* no EXEC_PAGESIZE */
40#    ifdef NBPG
41#     define getpagesize() NBPG * CLSIZE
42#     ifndef CLSIZE
43#      define CLSIZE 1
44#     endif /* no CLSIZE */
45#    else /* no NBPG */
46#     ifdef NBPC
47#      define getpagesize() NBPC
48#     else /* no NBPC */
49#      ifdef PAGESIZE
50#       define getpagesize() PAGESIZE
51#      endif /* PAGESIZE */
52#     endif /* no NBPC */
53#    endif /* no NBPG */
54#   endif /* no EXEC_PAGESIZE */
55#  else /* no HAVE_SYS_PARAM_H */
56#   define getpagesize() 8192	/* punt totally */
57#  endif /* no HAVE_SYS_PARAM_H */
58# endif /* no _SC_PAGESIZE */
59
60#endif /* no HAVE_GETPAGESIZE */
61
62/* arch-tag: ff6206e3-97e2-4763-923a-e84bf28eabbc
63   (do not change this comment) */
64