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 32 using namespace std; 33 34 /** 35 * Global lock for list of listeners 36 */ 37 pthread_mutex_t Listener::staticLock = PTHREAD_MUTEX_INITIALIZER; 38 39 /** 40 * Global list of listeners 41 */ 42 vector<Listener*> Listener::listeners; 43 44 /** 45 * Type for listener list iteration 46 */ 47 typedef 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 */ Listener(void * userData)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 * @exception ... underlying exceptions will be thrown 70 */ ~Listener()71Listener::~Listener() { 72 Lockable::lock(&staticLock); 73 try { 74 for (ListenerIterator tmp = listeners.begin(); 75 tmp != listeners.end(); tmp++) { 76 if (*tmp == this) { 77 listeners.erase(tmp); 78 Lockable::unlock(&staticLock); 79 return; 80 } 81 } 82 } catch (...) { 83 Lockable::unlock(&staticLock); 84 throw; 85 } 86 Lockable::unlock(&staticLock); 87 } 88 89 /** 90 * @memo Find a listener based on the callback handle 91 * @exception InvalidHandleException if the callback handle does not 92 * match any listeners 93 * @return The Listener who matches the callback handle 94 * @param cbh The callback handle 95 */ findListener(void * cbh)96Listener* Listener::findListener(void *cbh) { 97 Lockable::lock(&staticLock); 98 try { 99 for (ListenerIterator tmp = listeners.begin(); 100 tmp != listeners.end(); tmp++) { 101 if (*tmp == cbh) { 102 Lockable::unlock(&staticLock); 103 return (*tmp); 104 } 105 } 106 } catch (...) { 107 Lockable::unlock(&staticLock); 108 throw; 109 } 110 Lockable::unlock(&staticLock); 111 throw InvalidHandleException(); 112 } 113