43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
/* $NetBSD: uvm_readahead.h,v 1.4 2009/06/10 01:54:08 yamt Exp $ */
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/*-
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* Copyright (c)2003, 2005, 2009 YAMAMOTO Takashi,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if !defined(_UVM_UVM_READAHEAD_H_)
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#define _UVM_UVM_READAHEAD_H_
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struct uvm_object;
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struct uvm_ractx;
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void uvm_ra_init(void);
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struct uvm_ractx *uvm_ra_allocctx(void);
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void uvm_ra_freectx(struct uvm_ractx *);
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void uvm_ra_request(struct uvm_ractx *, int, struct uvm_object *, off_t,
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size_t);
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int uvm_readahead(struct uvm_object *, off_t, off_t);
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#endif /* defined(_UVM_UVM_READAHEAD_H_) */
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