1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24*7c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate #ifndef	_NIS_HASHITEM_H
28*7c478bd9Sstevel@tonic-gate #define	_NIS_HASHITEM_H
29*7c478bd9Sstevel@tonic-gate 
30*7c478bd9Sstevel@tonic-gate #include <pthread.h>
31*7c478bd9Sstevel@tonic-gate #include <rpcsvc/nis.h>
32*7c478bd9Sstevel@tonic-gate 
33*7c478bd9Sstevel@tonic-gate #include "nisdb_rw.h"
34*7c478bd9Sstevel@tonic-gate 
35*7c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
36*7c478bd9Sstevel@tonic-gate extern "C" {
37*7c478bd9Sstevel@tonic-gate #endif
38*7c478bd9Sstevel@tonic-gate 
39*7c478bd9Sstevel@tonic-gate /* Private versions of the various NIS_HASH_ITEM functions */
40*7c478bd9Sstevel@tonic-gate typedef struct __nis_item_item {
41*7c478bd9Sstevel@tonic-gate 	pthread_cond_t		lock;
42*7c478bd9Sstevel@tonic-gate 	nis_name		name;
43*7c478bd9Sstevel@tonic-gate 	int			keychain;
44*7c478bd9Sstevel@tonic-gate 	uint32_t		readers;
45*7c478bd9Sstevel@tonic-gate 	pthread_t		last_reader_id;
46*7c478bd9Sstevel@tonic-gate 	uint32_t		writer;
47*7c478bd9Sstevel@tonic-gate 	pthread_t		writer_id;
48*7c478bd9Sstevel@tonic-gate 	struct __nis_item_item	*next;
49*7c478bd9Sstevel@tonic-gate 	struct __nis_item_item	*prv_item;
50*7c478bd9Sstevel@tonic-gate 	struct __nis_item_item	*nxt_item;
51*7c478bd9Sstevel@tonic-gate } __nis_hash_item_mt;
52*7c478bd9Sstevel@tonic-gate 
53*7c478bd9Sstevel@tonic-gate typedef struct {
54*7c478bd9Sstevel@tonic-gate 	pthread_mutex_t		lock;
55*7c478bd9Sstevel@tonic-gate 	pthread_cond_t		cond;
56*7c478bd9Sstevel@tonic-gate 	pthread_mutex_t		traverser_id_lock;
57*7c478bd9Sstevel@tonic-gate 							/*
58*7c478bd9Sstevel@tonic-gate 							 * Protects 'traversed'
59*7c478bd9Sstevel@tonic-gate 							 * and 'traverser_id'.
60*7c478bd9Sstevel@tonic-gate 							 */
61*7c478bd9Sstevel@tonic-gate 	uint32_t		traversed;
62*7c478bd9Sstevel@tonic-gate 	pthread_t		traverser_id;
63*7c478bd9Sstevel@tonic-gate 	uint32_t		locked_items;
64*7c478bd9Sstevel@tonic-gate 	__nis_hash_item_mt	*keys[64];
65*7c478bd9Sstevel@tonic-gate 	__nis_hash_item_mt	*first;
66*7c478bd9Sstevel@tonic-gate 	void			(*destroyItem)(void *);
67*7c478bd9Sstevel@tonic-gate } __nis_hash_table_mt;
68*7c478bd9Sstevel@tonic-gate 
69*7c478bd9Sstevel@tonic-gate #define	NIS_HASH_TABLE_MT_INIT	{ \
70*7c478bd9Sstevel@tonic-gate 					PTHREAD_MUTEX_INITIALIZER, \
71*7c478bd9Sstevel@tonic-gate 					{0}, \
72*7c478bd9Sstevel@tonic-gate 					PTHREAD_MUTEX_INITIALIZER \
73*7c478bd9Sstevel@tonic-gate 					/* Zero is fine for the rest */ \
74*7c478bd9Sstevel@tonic-gate 				}
75*7c478bd9Sstevel@tonic-gate 
76*7c478bd9Sstevel@tonic-gate #define	LOCK_LIST(list, msg)	(void) __nis_lock_hash_table(list, 1, msg)
77*7c478bd9Sstevel@tonic-gate #define	ULOCK_LIST(list, msg)	(void) __nis_ulock_hash_table(list, 1, msg)
78*7c478bd9Sstevel@tonic-gate 
79*7c478bd9Sstevel@tonic-gate 
80*7c478bd9Sstevel@tonic-gate extern void	__nis_init_hash_table(__nis_hash_table_mt *, void (*)(void *));
81*7c478bd9Sstevel@tonic-gate extern int	__nis_lock_hash_table(__nis_hash_table_mt *, int, char *);
82*7c478bd9Sstevel@tonic-gate extern int	__nis_ulock_hash_table(__nis_hash_table_mt *, int, char *);
83*7c478bd9Sstevel@tonic-gate extern int	__nis_insert_item_mt(void *, __nis_hash_table_mt *, int);
84*7c478bd9Sstevel@tonic-gate extern void	__nis_insert_name_mt(nis_name, __nis_hash_table_mt *);
85*7c478bd9Sstevel@tonic-gate extern void	*__nis_find_item_mt(nis_name, __nis_hash_table_mt *, int,
86*7c478bd9Sstevel@tonic-gate 					int *);
87*7c478bd9Sstevel@tonic-gate extern void	*__nis_pop_item_mt(__nis_hash_table_mt *);
88*7c478bd9Sstevel@tonic-gate extern void	*__nis_remove_item_mt(nis_name, __nis_hash_table_mt *);
89*7c478bd9Sstevel@tonic-gate extern int	__nis_release_item(void *, __nis_hash_table_mt *, int);
90*7c478bd9Sstevel@tonic-gate extern int	__nis_item_access(void *);
91*7c478bd9Sstevel@tonic-gate extern void	__nis_scan_table_mt(__nis_hash_table_mt *,
92*7c478bd9Sstevel@tonic-gate 			bool_t (*)(__nis_hash_item_mt *, void *), void *);
93*7c478bd9Sstevel@tonic-gate 
94*7c478bd9Sstevel@tonic-gate /* Define-magic */
95*7c478bd9Sstevel@tonic-gate #define	NIS_HASH_ITEM			__nis_hash_item_mt
96*7c478bd9Sstevel@tonic-gate #define	NIS_HASH_TABLE			__nis_hash_table_mt
97*7c478bd9Sstevel@tonic-gate #define	nis_insert_item(i, t)		__nis_insert_item_mt(i, t, -1)
98*7c478bd9Sstevel@tonic-gate #define	nis_insert_item_rw(i, t, rw)	__nis_insert_item_mt(i, t, rw)
99*7c478bd9Sstevel@tonic-gate #define	nis_insert_name(n, t)		__nis_insert_name_mt(n, t)
100*7c478bd9Sstevel@tonic-gate #define	nis_find_item(i, t)		__nis_find_item_mt(i, t, -1, 0)
101*7c478bd9Sstevel@tonic-gate #define	nis_find_item_rw(i, t, rw)	__nis_find_item_mt(i, t, rw, 0)
102*7c478bd9Sstevel@tonic-gate #define	nis_pop_item			__nis_pop_item_mt
103*7c478bd9Sstevel@tonic-gate #define	nis_remove_item			__nis_remove_item_mt
104*7c478bd9Sstevel@tonic-gate #define	nis_scan_table			__nis_scan_table_mt
105*7c478bd9Sstevel@tonic-gate 
106*7c478bd9Sstevel@tonic-gate #define	MT_LOCK_TYPE(type)		(type < 0)?"W":(type > 0)?"R":"N"
107*7c478bd9Sstevel@tonic-gate 
108*7c478bd9Sstevel@tonic-gate #ifdef	NIS_MT_DEBUG
109*7c478bd9Sstevel@tonic-gate #define	MT_LOG(condition, syslogarg)	if (condition) syslog ## syslogarg
110*7c478bd9Sstevel@tonic-gate #else
111*7c478bd9Sstevel@tonic-gate #define	MT_LOG(condition, syslogarg)
112*7c478bd9Sstevel@tonic-gate #endif	/* NIS_MT_DEBUG */
113*7c478bd9Sstevel@tonic-gate 
114*7c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
115*7c478bd9Sstevel@tonic-gate }
116*7c478bd9Sstevel@tonic-gate #endif	/* __cplusplus */
117*7c478bd9Sstevel@tonic-gate 
118*7c478bd9Sstevel@tonic-gate #endif	/* _NIS_HASHITEM_H */
119