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 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26
27
28#include "Listener.h"
29#include "Exceptions.h"
30#include "Lockable.h"
31
32using namespace std;
33
34/**
35 * Global lock for list of listeners
36 */
37pthread_mutex_t Listener::staticLock = PTHREAD_MUTEX_INITIALIZER;
38
39/**
40 * Global list of listeners
41 */
42vector<Listener*> Listener::listeners;
43
44/**
45 * Type for listener list iteration
46 */
47typedef vector<Listener *>::iterator ListenerIterator;
48
49/**
50 * @memo	    Create a new generic listener
51 * @exception	    ... underlying exceptions will be thrown
52 * @param	    userData The opaque user data for event callback
53 *
54 */
55Listener::Listener(void *userData) {
56	data = userData;
57	Lockable::lock(&staticLock);
58	try {
59	    listeners.insert(listeners.begin(), this);
60	} catch (...) {
61	    Lockable::unlock(&staticLock);
62	    throw;
63	}
64	Lockable::unlock(&staticLock);
65}
66
67/**
68 * @memo	    Free up a generic listener, keeping global list in sync.
69 */
70Listener::~Listener() {
71	Lockable::lock(&staticLock);
72	for (ListenerIterator tmp = listeners.begin();
73	    tmp != listeners.end(); tmp++) {
74		if (*tmp == this) {
75			listeners.erase(tmp);
76			break;
77		}
78	}
79	Lockable::unlock(&staticLock);
80}
81
82/**
83 * @memo	    Find a listener based on the callback handle
84 * @exception	    InvalidHandleException if the callback handle does not
85 *		    match any listeners
86 * @return	    The Listener who matches the callback handle
87 * @param	    cbh The callback handle
88 */
89Listener* Listener::findListener(void *cbh) {
90	Lockable::lock(&staticLock);
91	try {
92	    for (ListenerIterator tmp = listeners.begin();
93			tmp != listeners.end(); tmp++) {
94		if (*tmp == cbh) {
95		    Lockable::unlock(&staticLock);
96		    return (*tmp);
97		}
98	    }
99	} catch (...) {
100	    Lockable::unlock(&staticLock);
101	    throw;
102	}
103	Lockable::unlock(&staticLock);
104	throw InvalidHandleException();
105}
106