NetBSD/sys/uvm/uvm_swap.h

68 lines
2.3 KiB
C

/* $NetBSD: uvm_swap.h,v 1.25 2019/05/01 07:17:18 mlelstv Exp $ */
/*
* Copyright (c) 1997 Matthew R. Green
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: Id: uvm_swap.h,v 1.1.2.6 1997/12/15 05:39:31 mrg Exp
*/
#ifndef _UVM_UVM_SWAP_H_
#define _UVM_UVM_SWAP_H_
#define SWSLOT_BAD (-1)
#if defined(_KERNEL) || defined(_MODULE)
#if defined(_KERNEL_OPT)
#include "opt_vmswap.h"
#endif
struct lwp;
#if defined(VMSWAP)
struct swapent;
int uvm_swap_get(struct vm_page *, int, int);
int uvm_swap_put(int, struct vm_page **, int, int);
int uvm_swap_alloc(int *, bool);
void uvm_swap_free(int, int);
void uvm_swap_markbad(int, int);
bool uvm_swapisfull(void);
void swapsys_lock(krw_t);
void swapsys_unlock(void);
int uvm_swap_stats(char *, int,
void (*)(void *, const struct swapent *), size_t, register_t *);
#else /* defined(VMSWAP) */
#define uvm_swapisfull() true
#define uvm_swap_stats(c, l, f, count, retval) (__used f, *retval = 0, ENOSYS)
#endif /* defined(VMSWAP) */
void uvm_swap_shutdown(struct lwp *);
#endif /* _KERNEL || _MODULE */
#endif /* _UVM_UVM_SWAP_H_ */