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d81b986b | 1 | /* mlock -- guarantee pages are resident in memory. Mach/Hurd version. |
04277e02 | 2 | Copyright (C) 2001-2019 Free Software Foundation, Inc. |
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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 | |
41bdb6e2 AJ |
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. | |
d81b986b RM |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
d81b986b | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
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16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
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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 | /* Guarantee all whole pages mapped by the range [ADDR,ADDR+LEN) to | |
26 | be memory resident. */ | |
27 | ||
28 | int | |
29 | mlock (const void *addr, size_t len) | |
30 | { | |
ed4060f5 | 31 | mach_port_t host; |
d81b986b RM |
32 | vm_address_t page; |
33 | error_t err; | |
34 | ||
ed4060f5 | 35 | err = __get_privileged_ports (&host, NULL); |
d81b986b | 36 | if (err) |
ed4060f5 | 37 | host = __mach_host_self(); |
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38 | |
39 | page = trunc_page ((vm_address_t) addr); | |
40 | len = round_page ((vm_address_t) addr + len) - page; | |
ed4060f5 ST |
41 | |
42 | err = __vm_wire (host, __mach_task_self (), page, len, VM_PROT_READ); | |
43 | if (host != __mach_host_self()) | |
44 | __mach_port_deallocate (__mach_task_self (), host); | |
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45 | |
46 | return err ? __hurd_fail (err) : 0; | |
47 | } |