root / lab4 / .minix-src / include / uvm / uvm_swap.h @ 14
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| 1 | 13 | up20180614 | /* $NetBSD: uvm_swap.h,v 1.22 2015/07/30 10:25:49 christos Exp $ */
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| 2 | |||
| 3 | /*
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| 4 | * Copyright (c) 1997 Matthew R. Green
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | *
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| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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| 22 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 26 | * SUCH DAMAGE.
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| 27 | *
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| 28 | * from: Id: uvm_swap.h,v 1.1.2.6 1997/12/15 05:39:31 mrg Exp
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| 29 | */
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| 30 | |||
| 31 | #ifndef _UVM_UVM_SWAP_H_
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| 32 | #define _UVM_UVM_SWAP_H_
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| 33 | |||
| 34 | #define SWSLOT_BAD (-1) |
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| 35 | |||
| 36 | #if defined(_KERNEL) || defined(_MODULE)
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| 37 | #if defined(_KERNEL_OPT)
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| 38 | #include "opt_vmswap.h" |
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| 39 | #endif
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| 40 | |||
| 41 | struct swapent;
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| 42 | struct lwp;
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| 43 | |||
| 44 | #if defined(VMSWAP)
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| 45 | int uvm_swap_get(struct vm_page *, int, int); |
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| 46 | int uvm_swap_put(int, struct vm_page **, int, int); |
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| 47 | int uvm_swap_alloc(int *, bool); |
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| 48 | void uvm_swap_free(int, int); |
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| 49 | void uvm_swap_markbad(int, int); |
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| 50 | bool uvm_swapisfull(void); |
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| 51 | void swapsys_lock(krw_t);
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| 52 | void swapsys_unlock(void); |
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| 53 | void uvm_swap_stats(int, struct swapent *, int, register_t *); |
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| 54 | |||
| 55 | #else /* defined(VMSWAP) */ |
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| 56 | #define uvm_swapisfull() true |
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| 57 | #define uvm_swap_stats(c, sep, count, retval) { *retval = 0; } |
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| 58 | #endif /* defined(VMSWAP) */ |
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| 59 | void uvm_swap_shutdown(struct lwp *); |
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| 60 | |||
| 61 | #endif /* _KERNEL || _MODULE */ |
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| 62 | |||
| 63 | #endif /* _UVM_UVM_SWAP_H_ */ |