1 /* 2 * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef JSCallbackData_h 30 #define JSCallbackData_h 31 32 #include "JSDOMBinding.h" 33 #include "JSDOMGlobalObject.h" 34 #include "ScriptExecutionContext.h" 35 #include <heap/Strong.h> 36 #include <runtime/JSObject.h> 37 #include <wtf/Threading.h> 38 39 namespace WebCore { 40 41 // We have to clean up this data on the context thread because unprotecting a 42 // JSObject on the wrong thread without synchronization would corrupt the heap 43 // (and synchronization would be slow). 44 45 class JSCallbackData { 46 public: 47 static void deleteData(void*); 48 JSCallbackData(JSC::JSObject * callback,JSDOMGlobalObject * globalObject)49 JSCallbackData(JSC::JSObject* callback, JSDOMGlobalObject* globalObject) 50 : m_callback(globalObject->globalData(), callback) 51 , m_globalObject(globalObject->globalData(), globalObject) 52 #ifndef NDEBUG 53 , m_thread(currentThread()) 54 #endif 55 { 56 } 57 ~JSCallbackData()58 ~JSCallbackData() 59 { 60 ASSERT(m_thread == currentThread()); 61 } 62 callback()63 JSC::JSObject* callback() { return m_callback.get(); } globalObject()64 JSDOMGlobalObject* globalObject() { return m_globalObject.get(); } 65 66 JSC::JSValue invokeCallback(JSC::MarkedArgumentBuffer&, bool* raisedException = 0); 67 68 private: 69 JSC::Strong<JSC::JSObject> m_callback; 70 JSC::Strong<JSDOMGlobalObject> m_globalObject; 71 #ifndef NDEBUG 72 ThreadIdentifier m_thread; 73 #endif 74 }; 75 76 class DeleteCallbackDataTask : public ScriptExecutionContext::Task { 77 public: create(JSCallbackData * data)78 static PassOwnPtr<DeleteCallbackDataTask> create(JSCallbackData* data) 79 { 80 return new DeleteCallbackDataTask(data); 81 } 82 performTask(ScriptExecutionContext *)83 virtual void performTask(ScriptExecutionContext*) 84 { 85 delete m_data; 86 } isCleanupTask()87 virtual bool isCleanupTask() const { return true; } 88 private: 89 DeleteCallbackDataTask(JSCallbackData * data)90 DeleteCallbackDataTask(JSCallbackData* data) : m_data(data) {} 91 92 JSCallbackData* m_data; 93 }; 94 95 } // namespace WebCore 96 97 #endif // JSCallbackData_h 98