1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/* Private data for pager library.
Copyright (C) 1994 Free Software Foundation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
struct pager
{
struct port_info port;
struct user_pager_info *upi;
enum
{
NOTINIT, /* before memory_object_init */
NORMAL, /* while running */
SHUTDOWN, /* ignore all further requests */
} pager_state;
struct mutex interlock;
struct condition wakeup;
struct lock_request *lock_requests; /* pending lock requests */
/* Interface ports */
memory_object_control_t memobjcntl;
memory_object_name_t memobjname;
int mscount;
int seqno;
int noterm; /* number of threads blocking termination */
struct pager *next, **pprev;
int termwaiting:1;
int waitingforseqno:1;
char *pagemap;
int pagemapsize;
};
struct lock_request
{
struct lock_request *next, **prevp;
vm_address_t start, end;
int pending_writes;
int locks_pending;
int threads_waiting;
};
enum page_errors
{
PAGE_NOERR,
PAGE_ENOSPC,
PAGE_EIO,
PAGE_EDQUOT,
};
|
