mmalloc/mvalloc.c

   1 /* Allocate memory on a page boundary.
   2    Copyright (C) 1991 Free Software Foundation, Inc.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) 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 GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include "mmalloc.h"
  20
  21 /* Cache the pagesize for the current host machine.  Note that if the host
  22    does not readily provide a getpagesize() function, we need to emulate it
  23    elsewhere, not clutter up this file with lots of kluges to try to figure
  24    it out. */
  25
  26 static size_t pagesize;
  27
  28 PTR
  29 mvalloc (md, size)
  30   PTR md;
  31   size_t size;
  32 {
  33   if (pagesize == 0)
  34     {
  35       pagesize = getpagesize ();
  36     }
  37
  38   return (mmemalign (md, pagesize, size));
  39 }