xref: /illumos-gate/usr/src/lib/libnisdb/nisdb_mt.cc (revision 1da57d551424de5a9d469760be7c4b4d4f10a755)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #include "nisdb_mt.h"
28 #include "nisdb_rw.h"
29 
30 #include "db_headers.h"
31 #include "db_entry.h"
32 #include "db.h"
33 #include "db_dictionary.h"
34 
35 
36 static nisdb_tsd_t	nisdb_shared_tsd;
37 static pthread_key_t	nisdb_tsd_key;
38 
39 void
__nisdb_tsd_destroy(void * key)40 __nisdb_tsd_destroy(void *key) {
41 
42 	nisdb_tsd_t	*tsd = (nisdb_tsd_t *)key;
43 
44 	if (tsd != 0) {
45 		free(tsd);
46 	}
47 }
48 
49 extern "C" {
50 static void
__nisdb_init_tsd_key(void)51 __nisdb_init_tsd_key(void)
52 {
53 	(void) pthread_key_create(&nisdb_tsd_key, __nisdb_tsd_destroy);
54 }
55 #pragma init(__nisdb_init_tsd_key)
56 }
57 
58 nisdb_tsd_t *
__nisdb_get_tsd(void)59 __nisdb_get_tsd(void) {
60 
61 	nisdb_tsd_t	*tsd;
62 
63 	if ((tsd = (nisdb_tsd_t *)pthread_getspecific(nisdb_tsd_key)) == 0) {
64 		/* No TSD; create it */
65 		if ((tsd = (nisdb_tsd_t *)malloc(sizeof (*tsd))) != 0) {
66 			/* Initialize TSD */
67 			memset(tsd, 0, sizeof (*tsd));
68 			/* Register TSD */
69 			if (pthread_setspecific(nisdb_tsd_key, tsd) != 0) {
70 				/* Can't store key */
71 #ifdef	NISDB_MT_DEBUG
72 				abort();
73 #endif
74 				free(tsd);
75 				tsd = &nisdb_shared_tsd;
76 			}
77 		} else {
78 			/* No memory ? */
79 #ifdef	NISDB_MT_DEBUG
80 			abort();
81 #endif
82 			tsd = &nisdb_shared_tsd;
83 		}
84 	}
85 
86 	return (tsd);
87 }
88 
89 void
setMappingStatus(int nisPlusStat,int ldapStat)90 setMappingStatus(int nisPlusStat, int ldapStat) {
91 	nisdb_tsd_t	*tsd = __nisdb_get_tsd();
92 
93 	if (tsd != 0) {
94 		tsd->nisPlusStat = nisPlusStat;
95 		tsd->ldapStat = ldapStat;
96 	}
97 }
98 
99 /*
100  * Save a copy of 'obj' in the TSD. If the TSD already holds an old object,
101  * delete it before saving the new one.
102  *
103  * On successful exit, '*storedP' indicates whether or not the entry was
104  * stored, and hence whether or not we're perfroming a modify operation.
105  *
106  * Return 1 if successful, 0 otherwise.
107  */
108 int
saveOldObjForModify(entry_obj * obj,int * storedP)109 saveOldObjForModify(entry_obj *obj, int *storedP) {
110 	nisdb_tsd_t	*tsd = __nisdb_get_tsd();
111 	int		stored;
112 
113 	if (tsd == 0)
114 		return (0);
115 
116 	if ((stored = tsd->doingModify) != 0) {
117 		entry_object	*eObj = tsd->oldObj;
118 
119 		if (eObj != 0) {
120 			free_entry(eObj);
121 			tsd->oldObj = 0;
122 		}
123 
124 		if (obj != 0) {
125 			eObj = new_entry((entry_object *)obj);
126 			if (eObj == 0)
127 				return (0);
128 		} else {
129 			eObj = 0;
130 		}
131 
132 		tsd->oldObj = (entry_obj *)eObj;
133 	}
134 
135 	if (storedP != 0)
136 		*storedP = stored;
137 
138 	return (1);
139 }
140 
141 /*
142  * Retrieve (and remove) the old object (if any) from the TSD. Returns 1
143  * if successful ('*oldObjP' might be NULL), 0 otherwise ('*oldObjP'
144  * unchanged).
145  */
146 int
retrieveOldObjForModify(entry_obj ** oldObjP)147 retrieveOldObjForModify(entry_obj **oldObjP) {
148 	nisdb_tsd_t	*tsd = __nisdb_get_tsd();
149 
150 	if (tsd == 0 || oldObjP == 0)
151 		return (0);
152 
153 	if (tsd->doingModify) {
154 		*oldObjP = tsd->oldObj;
155 		tsd->oldObj = 0;
156 	} else {
157 		*oldObjP = 0;
158 	}
159 
160 	return (1);
161 }
162