1/* 2 * Copyright (c) 1996, 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26#include "ObjectList.h" 27#include "awtmsg.h" 28 29/////////////////////////////////////////////////////////////////////////// 30// AwtObject list -- track all created widgets for cleanup and debugging 31 32AwtObjectList theAwtObjectList; 33 34AwtObjectList::AwtObjectList() 35{ 36 m_head = NULL; 37} 38 39void AwtObjectList::Add(AwtObject* obj) 40{ 41 CriticalSection::Lock l(m_lock); 42 43 /* Verify that the object is not already in the list. */ 44 DASSERT(LookUp(obj) == NULL); 45 46 AwtObjectListItem* item = new AwtObjectListItem(obj); 47 item->next = m_head; 48 m_head = item; 49} 50 51BOOL AwtObjectList::Remove(AwtObject* obj) 52{ 53 CriticalSection::Lock l(m_lock); 54 55 AwtObjectListItem* item = m_head; 56 AwtObjectListItem* lastItem = NULL; 57 58 while (item != NULL) { 59 if (item->obj == obj) { 60 if (lastItem == NULL) { 61 m_head = item->next; 62 } else { 63 lastItem->next = item->next; 64 } 65 DASSERT(item != NULL); 66 delete item; 67 return TRUE; 68 } 69 lastItem = item; 70 item = item->next; 71 } 72 73 return FALSE; 74 75// DASSERT(FALSE); // should never get here... 76 // even if it does it shouldn't be fatal. 77} 78 79#ifdef DEBUG 80AwtObject* AwtObjectList::LookUp(AwtObject* obj) 81{ 82 CriticalSection::Lock l(m_lock); 83 84 AwtObjectListItem* item = m_head; 85 86 while (item != NULL) { 87 if (item->obj == obj) { 88 return obj; 89 } 90 item = item->next; 91 } 92 return NULL; 93} 94#endif /* DEBUG */ 95 96void AwtObjectList::Cleanup() 97{ 98 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); 99 CHECK_IS_TOOLKIT_THREAD() 100 101 CriticalSection::Lock l(theAwtObjectList.m_lock); 102 103 CriticalSection &syncCS = AwtToolkit::GetInstance().GetSyncCS(); 104 BOOL entered = syncCS.TryEnter(); 105 if (entered) { 106 AwtObjectListItem* item = theAwtObjectList.m_head; 107 while (item != NULL) { 108 // AwtObject::Dispose() method will call AwtObjectList::Remove(), 109 // which will delete the item structure. 110 AwtObjectListItem* next = item->next; 111 // destructor for item->obj will be called from item->obj->Dispose() method 112 item->obj->Dispose(); 113 item = next; 114 } 115 theAwtObjectList.m_head = NULL; 116 syncCS.Leave(); 117 } else { 118 AwtToolkit::GetInstance().PostMessage(WM_AWT_OBJECTLISTCLEANUP, NULL, NULL); 119 } 120} 121