sysdeps/mach/hurd/mlockall.c

   1 /* mlockall -- lock in core all the pages in this process.  Hurd version.
   2    Copyright (C) 2001-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/types.h>
  20 #include <sys/mman.h>
  21 #include <errno.h>
  22 #include <hurd.h>
  23 #include <mach/mach_host.h>
  24
  25 /* Cause all currently mapped pages of the process to be memory resident
  26    until unlocked by a call to the `munlockall', until the process exits,
  27    or until the process calls `execve'.  */
  28
  29 int
  30 mlockall (int flags)
  31 {
  32   mach_port_t host;
  33   error_t err;
  34
  35   err = __get_privileged_ports (&host, NULL);
  36   if (err)
  37     return __hurd_fail (err);
  38
  39   err = __vm_wire_all (host, __mach_task_self (), flags);
  40   __mach_port_deallocate (__mach_task_self (), host);
  41   return err ? __hurd_fail (err) : 0;
  42 }