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/* $FreeBSD$ */
/* $NecBSD: physio_proc.h,v 3.4 1999/07/23 20:47:03 honda Exp $ */
/* $NetBSD$ */
/*
* [NetBSD for NEC PC-98 series]
* Copyright (c) 1998
* NetBSD/pc98 porting staff. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*/
#ifndef _I386_PHYSIO_PROC_H_
#define _I386_PHYSIO_PROC_H_
#include <sys/buf.h>
#include <sys/queue.h>
struct physio_proc;
TAILQ_HEAD(physio_proc_head, physio_proc);
struct physio_proc_head physio_proc_freet, physio_proc_busyt;
struct physio_proc {
TAILQ_ENTRY(physio_proc) pp_chain;
struct proc *pp_proc;
};
static __inline struct physio_proc *physio_proc_enter __P((struct buf *));
static __inline void physio_proc_leave __P((struct physio_proc *));
static __inline struct physio_proc *
physio_proc_enter(bp)
struct buf *bp;
{
struct physio_proc *pp;
int s;
if (bp == NULL || (bp->b_flags & B_PHYS) == 0)
return NULL;
if ((pp = physio_proc_freet.tqh_first) == NULL)
return NULL;
s = splstatclock();
TAILQ_REMOVE(&physio_proc_freet, pp, pp_chain);
#if !defined(__FreeBSD__) || __FreeBSD_version < 400001
pp->pp_proc = bp->b_proc;
#endif
TAILQ_INSERT_TAIL(&physio_proc_busyt, pp, pp_chain);
splx(s);
return pp;
}
static __inline void
physio_proc_leave(pp)
struct physio_proc *pp;
{
int s;
if (pp == NULL)
return;
s = splstatclock();
TAILQ_REMOVE(&physio_proc_busyt, pp, pp_chain);
TAILQ_INSERT_TAIL(&physio_proc_freet, pp, pp_chain);
pp->pp_proc = NULL;
splx(s);
}
void physio_proc_init __P((void));
#endif /* _I386_PHYSIO_PROC_H_ */
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