osd.h revision 185029 
1/*-
2 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/sys/osd.h 185029 2008-11-17 20:49:29Z pjd $
27 */
28
29#ifndef _SYS_OSD_H_
30#define _SYS_OSD_H_
31
32#include <sys/queue.h>
33
34struct osd {
35	u_int		  osd_nslots;
36	void		**osd_slots;
37	LIST_ENTRY(osd)	  osd_next;
38};
39
40#ifdef _KERNEL
41
42#define	OSD_THREAD	0
43#define	OSD_JAIL	1
44
45#define	OSD_FIRST	OSD_THREAD
46#define	OSD_LAST	OSD_JAIL
47
48typedef void (*osd_destructor_t)(void *value);
49
50int osd_register(u_int type, osd_destructor_t destructor);
51void osd_deregister(u_int type, u_int slot);
52
53int osd_set(u_int type, struct osd *osd, u_int slot, void *value);
54void *osd_get(u_int type, struct osd *osd, u_int slot);
55void osd_del(u_int type, struct osd *osd, u_int slot);
56
57void osd_exit(u_int type, struct osd *osd);
58
59#define	osd_thread_register(destructor)					\
60	osd_register(OSD_THREAD, (destructor))
61#define	osd_thread_deregister(slot)					\
62	osd_deregister(OSD_THREAD, (slot))
63#define	osd_thread_set(td, slot, value)					\
64	osd_set(OSD_THREAD, &(td)->td_osd, (slot), (value))
65#define	osd_thread_get(td, slot)					\
66	osd_get(OSD_THREAD, &(td)->td_osd, (slot))
67#define	osd_thread_del(td, slot)	do {				\
68	KASSERT((td) == curthread, ("Not curthread."));			\
69	osd_del(OSD_THREAD, &(td)->td_osd, (slot));			\
70} while (0)
71#define	osd_thread_exit(td)						\
72	osd_exit(OSD_THREAD, &(td)->td_osd)
73
74#define	osd_jail_register(destructor)					\
75	osd_register(OSD_JAIL, (destructor))
76#define	osd_jail_deregister(slot)					\
77	osd_deregister(OSD_JAIL, (slot))
78#define	osd_jail_set(pr, slot, value)					\
79	osd_set(OSD_JAIL, &(pr)->pr_osd, (slot), (value))
80#define	osd_jail_get(pr, slot)						\
81	osd_get(OSD_JAIL, &(pr)->pr_osd, (slot))
82#define	osd_jail_del(pr, slot)						\
83	osd_del(OSD_JAIL, &(pr)->pr_osd, (slot))
84#define	osd_jail_exit(pr)						\
85	osd_exit(OSD_JAIL, &(pr)->pr_osd)
86
87#endif	/* _KERNEL */
88
89#endif	/* !_SYS_OSD_H_ */
90