libc/stdlib/valloc.c

   1 /* vi: set sw=4 ts=4: */
   2 /* Allocate memory on a page boundary.
   3    Copyright (C) 1991, 1992 Free Software Foundation, Inc.
   4
   5 This library is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 License, or (at your option) any later version.
   9
  10 This library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with this library; see the file COPYING.LIB.  If
  17 not, see <http://www.gnu.org/licenses/>.
  18
  19    The author may be reached (Email) at the address mike@@ai.mit.edu,
  20    or (US mail) as Mike Haertel c/o Free Software Foundation.  */
  21
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <malloc.h>
  25
  26
  27 static size_t pagesize;
  28
  29 __ptr_t valloc (size_t size)
  30 {
  31         if (pagesize == 0)
  32                 pagesize = getpagesize ();
  33
  34         return memalign(pagesize, size);
  35 }