56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* Emulation of getpagesize() for systems that need it.
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Copyright (C) 1991 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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# if defined (_SC_PAGESIZE)
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# define getpagesize() sysconf(_SC_PAGESIZE)
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# else
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# if defined (_SC_PAGE_SIZE)
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# define getpagesize() sysconf(_SC_PAGE_SIZE)
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# endif /* _SC_PAGE_SIZE */
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# endif /* _SC_PAGESIZE */
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#endif
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#if !defined (getpagesize)
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# ifdef HAVE_SYS_PARAM_H
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# include <sys/param.h>
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# endif
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# if defined (PAGESIZE)
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# define getpagesize() PAGESIZE
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# else /* !PAGESIZE */
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# if defined (EXEC_PAGESIZE)
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# define getpagesize() EXEC_PAGESIZE
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# else /* !EXEC_PAGESIZE */
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# if defined (NBPG)
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# if !defined (CLSIZE)
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# define CLSIZE 1
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# endif /* !CLSIZE */
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# define getpagesize() (NBPG * CLSIZE)
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# else /* !NBPG */
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# if defined (NBPC)
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# define getpagesize() NBPC
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# endif /* NBPC */
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# endif /* !NBPG */
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# endif /* !EXEC_PAGESIZE */
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# endif /* !PAGESIZE */
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#endif /* !getpagesize */
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#if !defined (getpagesize)
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# define getpagesize() 4096 /* Just punt and use reasonable value */
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#endif
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