libc/stdlib/valloc.c

   1 /* Allocate memory on a page boundary.
   2    Copyright (C) 1991, 1992 Free Software Foundation, Inc.
   3
   4 This 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 This 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 this library; see the file COPYING.LIB.  If
  16 not, see <http://www.gnu.org/licenses/>.
  17
  18    The author may be reached (Email) at the address mike@@ai.mit.edu,
  19    or (US mail) as Mike Haertel c/o Free Software Foundation.  */
  20
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <malloc.h>
  24
  25
  26 static size_t pagesize;
  27
  28 __ptr_t valloc (size_t size)
  29 {
  30         if (pagesize == 0)
  31                 pagesize = getpagesize ();
  32
  33         return memalign(pagesize, size);
  34 }