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| 1 | 13 | up20180614 | /* $NetBSD: uvm_pdaemon.h,v 1.17 2011/02/02 15:25:27 chuck Exp $ */
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| 2 | |||
| 3 | /*
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| 4 | * Copyright (c) 1997 Charles D. Cranor and Washington University.
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| 5 | * Copyright (c) 1991, 1993, The Regents of the University of California.
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| 6 | *
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| 7 | * All rights reserved.
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| 8 | *
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| 9 | * This code is derived from software contributed to Berkeley by
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| 10 | * The Mach Operating System project at Carnegie-Mellon University.
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| 11 | *
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| 12 | * Redistribution and use in source and binary forms, with or without
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| 13 | * modification, are permitted provided that the following conditions
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| 14 | * are met:
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| 15 | * 1. Redistributions of source code must retain the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer.
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| 17 | * 2. Redistributions in binary form must reproduce the above copyright
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| 18 | * notice, this list of conditions and the following disclaimer in the
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| 19 | * documentation and/or other materials provided with the distribution.
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| 20 | * 3. Neither the name of the University nor the names of its contributors
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| 21 | * may be used to endorse or promote products derived from this software
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| 22 | * without specific prior written permission.
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| 23 | *
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| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 34 | * SUCH DAMAGE.
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| 35 | *
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| 36 | * @(#)vm_pageout.h 8.2 (Berkeley) 1/12/94
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| 37 | * from: Id: uvm_pdaemon.h,v 1.1.2.4 1998/02/02 20:07:20 chuck Exp
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| 38 | *
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| 39 | *
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| 40 | * Copyright (c) 1987, 1990 Carnegie-Mellon University.
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| 41 | * All rights reserved.
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| 42 | *
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| 43 | * Permission to use, copy, modify and distribute this software and
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| 44 | * its documentation is hereby granted, provided that both the copyright
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| 45 | * notice and this permission notice appear in all copies of the
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| 46 | * software, derivative works or modified versions, and any portions
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| 47 | * thereof, and that both notices appear in supporting documentation.
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| 48 | *
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| 49 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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| 50 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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| 51 | * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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| 52 | *
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| 53 | * Carnegie Mellon requests users of this software to return to
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| 54 | *
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| 55 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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| 56 | * School of Computer Science
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| 57 | * Carnegie Mellon University
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| 58 | * Pittsburgh PA 15213-3890
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| 59 | *
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| 60 | * any improvements or extensions that they make and grant Carnegie the
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| 61 | * rights to redistribute these changes.
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| 62 | */
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| 63 | |||
| 64 | #ifndef _UVM_UVM_PDAEMON_H_
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| 65 | #define _UVM_UVM_PDAEMON_H_
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| 66 | |||
| 67 | /*
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| 68 | * uvm_pdaemon.h: page daemon hooks
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| 69 | */
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| 70 | |||
| 71 | #ifdef _KERNEL
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| 72 | |||
| 73 | /*
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| 74 | * prototypes
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| 75 | */
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| 76 | |||
| 77 | void uvm_wait(const char *); |
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| 78 | bool uvm_reclaimable(void); |
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| 79 | |||
| 80 | kmutex_t *uvmpd_trylockowner(struct vm_page *);
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| 81 | #ifdef VMSWAP
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| 82 | bool uvmpd_trydropswap(struct vm_page *); |
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| 83 | #else
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| 84 | #define uvmpd_trydropswap(_a_) (/*CONSTCOND*/false) |
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| 85 | #endif
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| 86 | |||
| 87 | #endif /* _KERNEL */ |
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| 88 | |||
| 89 | #endif /* _UVM_UVM_PDAEMON_H_ */ |