| /* mlock -- guarantee pages are resident in memory. Mach/Hurd version. |
| Copyright (C) 2001-2018 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 Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sys/types.h> |
| #include <sys/mman.h> |
| #include <errno.h> |
| #include <hurd.h> |
| #include <mach/mach_host.h> |
| |
| /* Guarantee all whole pages mapped by the range [ADDR,ADDR+LEN) to |
| be memory resident. */ |
| |
| int |
| mlock (const void *addr, size_t len) |
| { |
| mach_port_t host; |
| vm_address_t page; |
| error_t err; |
| |
| err = __get_privileged_ports (&host, NULL); |
| if (err) |
| host = __mach_host_self(); |
| |
| page = trunc_page ((vm_address_t) addr); |
| len = round_page ((vm_address_t) addr + len) - page; |
| |
| err = __vm_wire (host, __mach_task_self (), page, len, VM_PROT_READ); |
| if (host != __mach_host_self()) |
| __mach_port_deallocate (__mach_task_self (), host); |
| |
| return err ? __hurd_fail (err) : 0; |
| } |
