Give ps access to a process's thread structure.
[dragonfly.git] / sys / platform / pc32 / include / physio_proc.h
CommitLineData
984263bc 1/* $FreeBSD: src/sys/i386/include/physio_proc.h,v 1.1.2.1 2000/10/29 11:05:48 non Exp $ */
1de703da 2/* $DragonFly: src/sys/platform/pc32/include/Attic/physio_proc.h,v 1.2 2003/06/17 04:28:36 dillon Exp $ */
984263bc
MD
3/* $NecBSD: physio_proc.h,v 3.4 1999/07/23 20:47:03 honda Exp $ */
4/* $NetBSD$ */
5
6/*
7 * [NetBSD for NEC PC-98 series]
8 * Copyright (c) 1998
9 * NetBSD/pc98 porting staff. All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
30 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 */
34#ifndef _I386_PHYSIO_PROC_H_
35#define _I386_PHYSIO_PROC_H_
36#include <sys/buf.h>
37#include <sys/queue.h>
38
39struct physio_proc;
40TAILQ_HEAD(physio_proc_head, physio_proc);
41struct physio_proc_head physio_proc_freet, physio_proc_busyt;
42
43struct physio_proc {
44 TAILQ_ENTRY(physio_proc) pp_chain;
45 struct proc *pp_proc;
46};
47
48static __inline struct physio_proc *physio_proc_enter __P((struct buf *));
49static __inline void physio_proc_leave __P((struct physio_proc *));
50
51static __inline struct physio_proc *
52physio_proc_enter(bp)
53 struct buf *bp;
54{
55 struct physio_proc *pp;
56 int s;
57
58 if (bp == NULL || (bp->b_flags & B_PHYS) == 0)
59 return NULL;
60 if ((pp = physio_proc_freet.tqh_first) == NULL)
61 return NULL;
62
63 s = splstatclock();
64 TAILQ_REMOVE(&physio_proc_freet, pp, pp_chain);
65#if !defined(__FreeBSD__) || __FreeBSD_version < 400001
66 pp->pp_proc = bp->b_proc;
67#endif
68 TAILQ_INSERT_TAIL(&physio_proc_busyt, pp, pp_chain);
69 splx(s);
70 return pp;
71}
72
73static __inline void
74physio_proc_leave(pp)
75 struct physio_proc *pp;
76{
77 int s;
78
79 if (pp == NULL)
80 return;
81
82 s = splstatclock();
83 TAILQ_REMOVE(&physio_proc_busyt, pp, pp_chain);
84 TAILQ_INSERT_TAIL(&physio_proc_freet, pp, pp_chain);
85 pp->pp_proc = NULL;
86 splx(s);
87}
88
89void physio_proc_init __P((void));
90#endif /* _I386_PHYSIO_PROC_H_ */