1/*-
 2 * SPDX-License-Identifier: BSD-2-Clause
 3 *
 4 * Copyright (c) 2017,	Jeffrey Roberson <jeff@freebsd.org>
 5 * All rights reserved.
 6 *
 7 * Redistribution and use in source and binary forms, with or without
 8 * modification, are permitted provided that the following conditions
 9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice unmodified, this list of conditions, and the following
12 *    disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef _SYS__DOMAINSET_H_
30#define	_SYS__DOMAINSET_H_
31
32#include <sys/_bitset.h>
33
34#ifdef _KERNEL
35#define	DOMAINSET_SETSIZE	MAXMEMDOM
36#endif
37
38#define	DOMAINSET_MAXSIZE	256
39
40#ifndef	DOMAINSET_SETSIZE
41#define	DOMAINSET_SETSIZE	DOMAINSET_MAXSIZE
42#endif
43
44__BITSET_DEFINE(_domainset, DOMAINSET_SETSIZE);
45typedef struct _domainset domainset_t;
46
47/*
48 * This structure is intended to be embedded in objects which have policy
49 * attributes.  Each object keeps its own iterator so round-robin is
50 * synchronized and accurate.
51 */
52struct domainset;
53struct domainset_ref {
54	struct domainset * volatile	dr_policy;
55	unsigned int			dr_iter;
56};
57
58#endif /* !_SYS__DOMAINSET_H_ */