| 1 | /* Emulate getpagesize on systems that lack it.
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| 2 | Copyright (C) 1999, 2000, 2004, 2005 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software; you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 2, or (at your option)
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| 7 | any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program; if not, write to the Free Software
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| 16 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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| 17 | USA. */
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| 18 |
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| 19 | #ifndef HAVE_GETPAGESIZE
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| 20 |
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| 21 | #include <unistd.h>
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| 22 |
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| 23 | #if !defined getpagesize && defined _SC_PAGESIZE
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| 24 | # if ! (defined __VMS && __VMS_VER < 70000000)
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| 25 | # define getpagesize() sysconf (_SC_PAGESIZE)
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| 26 | # endif
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| 27 | #endif
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| 28 |
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| 29 | #if !defined getpagesize && defined __VMS
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| 30 | # ifdef __ALPHA
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| 31 | # define getpagesize() 8192
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| 32 | # else
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| 33 | # define getpagesize() 512
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| 34 | # endif
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| 35 | #endif
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| 36 |
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| 37 | /* This is for BeOS. */
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| 38 | #if !defined getpagesize && HAVE_OS_H
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| 39 | # include <OS.h>
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| 40 | # if defined B_PAGE_SIZE
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| 41 | # define getpagesize() B_PAGE_SIZE
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| 42 | # endif
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| 43 | #endif
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| 44 |
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| 45 | #if !defined getpagesize && HAVE_SYS_PARAM_H
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| 46 | # include <sys/param.h>
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| 47 | # ifdef EXEC_PAGESIZE
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| 48 | # define getpagesize() EXEC_PAGESIZE
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| 49 | # else
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| 50 | # ifdef NBPG
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| 51 | # ifndef CLSIZE
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| 52 | # define CLSIZE 1
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| 53 | # endif
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| 54 | # define getpagesize() (NBPG * CLSIZE)
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| 55 | # else
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| 56 | # ifdef NBPC
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| 57 | # define getpagesize() NBPC
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| 58 | # endif
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| 59 | # endif
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| 60 | # endif
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| 61 | #endif
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| 62 |
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| 63 | #endif /* not HAVE_GETPAGESIZE */
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