sip_hash.h revision 3439:0302bfe973fe 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef	_SIP_HASH_H
28#define	_SIP_HASH_H
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#ifdef	__cplusplus
33extern "C" {
34#endif
35
36#include <pthread.h>
37
38/* A prime number */
39#define	SIP_HASH_SZ	6037
40
41#define	SIP_DIGEST_TO_HASH(digest)					\
42	((digest[0] + digest[1] + digest[2] + digest[3] + digest[4] +	\
43	digest[5] + digest[6] + digest[7]) % SIP_HASH_SZ)
44
45/* An entry in the hash table, sip_obj is opaque */
46typedef struct	sip_hash_obj_s {
47	void			*sip_obj;
48	struct sip_hash_obj_s	*next_obj;
49	struct sip_hash_obj_s	*prev_obj;
50} sip_hash_obj_t;
51
52
53/* A hash list in the table */
54typedef struct sip_hash_s {
55	sip_hash_obj_t	*hash_head;
56	sip_hash_obj_t	*hash_tail;
57	int		hash_count;
58	pthread_mutex_t sip_hash_mutex;
59}sip_hash_t;
60
61int	sip_hash_add(sip_hash_t	*, void *, int);
62void	*sip_hash_find(sip_hash_t *, void *, int,
63	    boolean_t (*)(void *, void *));
64void	sip_walk_hash(sip_hash_t *, void (*)(void *, void *), void *);
65void	sip_hash_delete(sip_hash_t *, void *, int,
66	    boolean_t (*)(void *, void *, int *));
67void	sip_hash_init();
68
69#ifdef	__cplusplus
70}
71#endif
72
73#endif	/* _SIP_HASH_H */
74