1 /* Emulation of getpagesize() for systems that need it.
2 Copyright (C) 1991 Free Software Foundation, Inc.
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 of the License, or
7 (at your option) any later version.
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.
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., 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
18 #if defined (HAVE_UNISTD_H)
20 # include <sys/types.h>
23 # if defined (_SC_PAGESIZE)
24 # define getpagesize() sysconf(_SC_PAGESIZE)
26 # if defined (_SC_PAGE_SIZE)
27 # define getpagesize() sysconf(_SC_PAGE_SIZE)
28 # endif /* _SC_PAGE_SIZE */
29 # endif /* _SC_PAGESIZE */
32 #if !defined (getpagesize)
34 # include <sys/param.h>
36 # if defined (PAGESIZE)
37 # define getpagesize() PAGESIZE
38 # else /* !PAGESIZE */
39 # if defined (EXEC_PAGESIZE)
40 # define getpagesize() EXEC_PAGESIZE
41 # else /* !EXEC_PAGESIZE */
43 # if !defined (CLSIZE)
46 # define getpagesize() (NBPG * CLSIZE)
49 # define getpagesize() NBPC
52 # endif /* !EXEC_PAGESIZE */
53 # endif /* !PAGESIZE */
54 #endif /* !getpagesize */
56 #if !defined (getpagesize)
57 # define getpagesize() 4096 /* Just punt and use reasonable value */