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