mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-16 18:10:11 +00:00
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/* mlock -- guarantee pages are resident in memory. Mach/Hurd version.
|
|
Copyright (C) 2001-2016 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;
|
|
}
|