diff options
Diffstat (limited to 'REORG.TODO/sysdeps/mach/hurd/mlock.c')
-rw-r--r-- | REORG.TODO/sysdeps/mach/hurd/mlock.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/mach/hurd/mlock.c b/REORG.TODO/sysdeps/mach/hurd/mlock.c new file mode 100644 index 0000000000..3eb415bc9d --- /dev/null +++ b/REORG.TODO/sysdeps/mach/hurd/mlock.c @@ -0,0 +1,47 @@ +/* mlock -- guarantee pages are resident in memory. Mach/Hurd version. + Copyright (C) 2001-2017 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; +} |