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