sysdeps/unix/getpagesize.c

   1 /* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library 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 The GNU C Library 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 the GNU C Library; see the file COPYING.  If not, write to
  16 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 #include <ansidecl.h>
  19 #include <stddef.h>
  20 #include <sys/param.h>
  21
  22 /* Return the system page size.  */
  23 size_t
  24 DEFUN_VOID(__getpagesize)
  25 {
  26 #ifdef  EXEC_PAGESIZE
  27   return EXEC_PAGESIZE;
  28 #else   /* No EXEC_PAGESIZE.  */
  29 #ifdef  NBPG
  30 #ifndef CLSIZE
  31 #define CLSIZE  1
  32 #endif  /* No CLSIZE.  */
  33   return NBPG * CLSIZE;
  34 #else   /* No NBPG.  */
  35   return NBPC;
  36 #endif  /* NBPG.  */
  37 #endif  /* EXEC_PAGESIZE.  */
  38 }
  39
  40 weak_alias (__getpagesize, getpagesize)