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/* 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,
};
void _pager_wait_for_seqno (struct pager *, int);
void _pager_release_seqno (struct pager *);
void _pager_block_termination (struct pager *);
void _pager_allow_termination (struct pager *);
void _pager_pagemap_resize (struct pager *, vm_address_t);
void _pager_mark_object_error (struct pager *, vm_address_t, vm_size_t, int);
struct pager *_pager_all_pagers;
spin_lock_t pagerlistlock;
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