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
41mdb_callb_t *
42mdb_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
64void
65mdb_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
84void
85mdb_callb_remove_by_mod(mdb_module_t *m)
86{
87	while (m->mod_cb != NULL)
88		mdb_callb_remove(m->mod_cb);
89}
90
91void
92mdb_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
100void
101mdb_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