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 #include "mt.h"
28 #include <stdlib.h>
29
30 void *
thr_get_storage(pthread_key_t * keyp,size_t size,void (* destructor)(void *))31 thr_get_storage(pthread_key_t *keyp, size_t size, void (*destructor)(void *))
32 {
33 void *addr;
34
35 if (pthread_key_create_once_np(keyp, destructor) != 0)
36 return (NULL);
37 addr = pthread_getspecific(*keyp);
38 if (addr == NULL && size != 0) {
39 addr = calloc(1, size);
40 if (addr != NULL && pthread_setspecific(*keyp, addr) != 0) {
41 free(addr);
42 return (NULL);
43 }
44 }
45
46 return (addr);
47 }
48
49 /*
50 * sig_mutex_lock() and sig_mutex_unlock() are the same
51 * as mutex_lock() and mutex_unlock() except that all
52 * signals are deferred while the lock is held. Likewise
53 * for sig_rw_rdlock(), sig_rw_wrlock() and sig_rw_unlock().
54 *
55 * _sigoff() and _sigon() are consolidation-private
56 * interfaces in libc that defer and enable signals.
57 * Calls to these can nest but must be balanced, so
58 * nested calls to these functions work properly.
59 */
60
61 void
sig_mutex_lock(mutex_t * mp)62 sig_mutex_lock(mutex_t *mp)
63 {
64 _sigoff();
65 (void) mutex_lock(mp);
66 }
67
68 void
sig_mutex_unlock(mutex_t * mp)69 sig_mutex_unlock(mutex_t *mp)
70 {
71 (void) mutex_unlock(mp);
72 _sigon();
73 }
74
75 void
sig_rw_rdlock(rwlock_t * rwlp)76 sig_rw_rdlock(rwlock_t *rwlp)
77 {
78 _sigoff();
79 (void) rw_rdlock(rwlp);
80 }
81
82 void
sig_rw_wrlock(rwlock_t * rwlp)83 sig_rw_wrlock(rwlock_t *rwlp)
84 {
85 _sigoff();
86 (void) rw_wrlock(rwlp);
87 }
88
89 void
sig_rw_unlock(rwlock_t * rwlp)90 sig_rw_unlock(rwlock_t *rwlp)
91 {
92 (void) rw_unlock(rwlp);
93 _sigon();
94 }
95