uclibc-ng/libc/sysdeps/linux/common/getpagesize.c

/* Copyright (C) 1991, 1992, 1995, 1996, 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <unistd.h>
#include <features.h>
#include <sys/param.h>

/* Return the system page size.  */
int __getpagesize(void)
{
#ifdef	EXEC_PAGESIZE
  return EXEC_PAGESIZE;
#else	/* No EXEC_PAGESIZE.  */
#ifdef	NBPG
#ifndef	CLSIZE
#define	CLSIZE	1
#endif	/* No CLSIZE.  */
  return NBPG * CLSIZE;
#else	/* No NBPG.  */
  return NBPC;
#endif	/* NBPG.  */
#endif	/* EXEC_PAGESIZE.  */
}

weak_alias(__getpagesize, getpagesize);