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 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /*
30 * Callback facility designed to allow interested parties (dmods, targets, or
31 * even the core debugger framework) to register for notification when certain
32 * "interesting" events occur.
33 */
34
35 #include <mdb/mdb_list.h>
36 #include <mdb/mdb_debug.h>
37 #include <mdb/mdb_callb.h>
38 #include <mdb/mdb_module.h>
39 #include <mdb/mdb.h>
40
41 mdb_callb_t *
mdb_callb_add(mdb_module_t * m,int class,mdb_callb_f fp,void * arg)42 mdb_callb_add(mdb_module_t *m, int class, mdb_callb_f fp, void *arg)
43 {
44 mdb_callb_t *new = mdb_zalloc(sizeof (mdb_callb_t), UM_SLEEP);
45
46 ASSERT(class == MDB_CALLB_STCHG || class == MDB_CALLB_PROMPT);
47
48 new->cb_mod = m;
49 new->cb_class = class;
50 new->cb_func = fp;
51 new->cb_arg = arg;
52
53 if (m == NULL) {
54 mdb_list_prepend(&mdb.m_cblist, new);
55 } else {
56 mdb_list_insert(&mdb.m_cblist, m->mod_cb, new);
57 if (m->mod_cb == NULL)
58 m->mod_cb = new;
59 }
60
61 return (new);
62 }
63
64 void
mdb_callb_remove(mdb_callb_t * cb)65 mdb_callb_remove(mdb_callb_t *cb)
66 {
67 if (cb->cb_mod != NULL) {
68 mdb_callb_t *next = mdb_list_next(cb);
69 mdb_module_t *mod = cb->cb_mod;
70
71 if (mod->mod_cb == cb) {
72 if (next == NULL || next->cb_mod != mod)
73 mod->mod_cb = NULL;
74 else
75 mod->mod_cb = next;
76 }
77 }
78
79 mdb_list_delete(&mdb.m_cblist, cb);
80
81 mdb_free(cb, sizeof (mdb_callb_t));
82 }
83
84 void
mdb_callb_remove_by_mod(mdb_module_t * m)85 mdb_callb_remove_by_mod(mdb_module_t *m)
86 {
87 while (m->mod_cb != NULL)
88 mdb_callb_remove(m->mod_cb);
89 }
90
91 void
mdb_callb_remove_all(void)92 mdb_callb_remove_all(void)
93 {
94 mdb_callb_t *cb;
95
96 while ((cb = mdb_list_next(&mdb.m_cblist)) != NULL)
97 mdb_callb_remove(cb);
98 }
99
100 void
mdb_callb_fire(int class)101 mdb_callb_fire(int class)
102 {
103 mdb_callb_t *cb, *next;
104
105 ASSERT(class == MDB_CALLB_STCHG || class == MDB_CALLB_PROMPT);
106
107 mdb_dprintf(MDB_DBG_CALLB, "invoking %s callbacks\n",
108 (class == MDB_CALLB_STCHG ? "state change" : "prompt"));
109
110 for (cb = mdb_list_next(&mdb.m_cblist); cb != NULL; cb = next) {
111 next = mdb_list_next(cb);
112 if (cb->cb_class == class)
113 cb->cb_func(cb->cb_arg);
114 }
115 }
116