swap_pager.h revision 139825 
1/*-
2 * Copyright (c) 1990 University of Utah.
3 * Copyright (c) 1991 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	from: @(#)swap_pager.h	7.1 (Berkeley) 12/5/90
35 * $FreeBSD: head/sys/vm/swap_pager.h 139825 2005-01-07 02:29:27Z imp $
36 */
37
38#ifndef	_VM_SWAP_PAGER_H_
39#define	_VM_SWAP_PAGER_H_ 1
40
41#ifdef _KERNEL
42
43extern int swap_pager_full;
44extern int swap_pager_avail;
45
46struct swdevt;
47void swap_pager_copy(vm_object_t, vm_object_t, vm_pindex_t, int);
48void swap_pager_freespace(vm_object_t, vm_pindex_t, vm_size_t);
49void swap_pager_swap_init(void);
50int swap_pager_isswapped(vm_object_t, struct swdevt *);
51int swap_pager_reserve(vm_object_t, vm_pindex_t, vm_size_t);
52void swap_pager_status(int *total, int *used);
53
54#endif				/* _KERNEL */
55#endif				/* _VM_SWAP_PAGER_H_ */
56