1/* Emulate getpagesize on systems that lack it.
2   Copyright (C) 1999, 2000, 2004 Free Software Foundation, Inc.
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 2, or (at your option)
7   any later version.
8
9   This program 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
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software
16   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
17   USA.  */
18
19#ifndef HAVE_GETPAGESIZE
20
21#ifdef HAVE_UNISTD_H
22# include <unistd.h>
23#endif
24
25#if !defined getpagesize && defined _SC_PAGESIZE
26# if !(defined VMS && __VMS_VER < 70000000)
27#  define getpagesize() sysconf (_SC_PAGESIZE)
28# endif
29#endif
30
31#if !defined getpagesize && defined VMS
32# ifdef __ALPHA
33#  define getpagesize() 8192
34# else
35#  define getpagesize() 512
36# endif
37#endif
38
39/* This is for BeOS.  */
40#if !defined getpagesize && HAVE_OS_H
41# include <OS.h>
42# if defined B_PAGE_SIZE
43#  define getpagesize() B_PAGE_SIZE
44# endif
45#endif
46
47#if !defined getpagesize && HAVE_SYS_PARAM_H
48# include <sys/param.h>
49# ifdef EXEC_PAGESIZE
50#  define getpagesize() EXEC_PAGESIZE
51# else
52#  ifdef NBPG
53#   ifndef CLSIZE
54#    define CLSIZE 1
55#   endif
56#   define getpagesize() (NBPG * CLSIZE)
57#  else
58#   ifdef NBPC
59#    define getpagesize() NBPC
60#   endif
61#  endif
62# endif
63#endif
64
65#endif /* not HAVE_GETPAGESIZE */
66