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/* munlock -- undo the effects of prior mlock calls.  Mach/Hurd version.
   Copyright (C) 2001 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 <sys/types.h>
#include <sys/mman.h>
#include <errno.h>
#include <hurd.h>
#include <mach/mach_host.h>

/* Undo the effects on these whole pages of any prior mlock calls.  */

int
munlock (const void *addr, size_t len)
{
  mach_port_t hostpriv;
  vm_address_t page;
  error_t err;

  err = __get_privileged_ports (&hostpriv, NULL);
  if (err)
    return __hurd_fail (EPERM);

  page = trunc_page ((vm_address_t) addr);
  len = round_page ((vm_address_t) addr + len) - page;
  err = __vm_wire (hostpriv, __mach_task_self (), page, len, VM_PROT_NONE);
  __mach_port_deallocate (__mach_task_self (), hostpriv);

  return err ? __hurd_fail (err) : 0;
}