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