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 <heap/StrongInlines.h> 37#include <runtime/JSObject.h> 38#include <wtf/Threading.h> 39 40namespace WebCore { 41 42// We have to clean up this data on the context thread because unprotecting a 43// JSObject on the wrong thread without synchronization would corrupt the heap 44// (and synchronization would be slow). 45 46class JSCallbackData { 47public: 48 static void deleteData(void*); 49 50 JSCallbackData(JSC::JSObject* callback, JSDOMGlobalObject* globalObject) 51 : m_callback(globalObject->vm(), callback) 52 , m_globalObject(globalObject->vm(), globalObject) 53#ifndef NDEBUG 54 , m_thread(currentThread()) 55#endif 56 { 57 } 58 59 ~JSCallbackData() 60 { 61 ASSERT(m_thread == currentThread()); 62 } 63 64 JSC::JSObject* callback() { return m_callback.get(); } 65 JSDOMGlobalObject* globalObject() { return m_globalObject.get(); } 66 67 JSC::JSValue invokeCallback(JSC::MarkedArgumentBuffer&, bool* raisedException = 0); 68 JSC::JSValue invokeCallback(JSC::JSValue thisValue, JSC::MarkedArgumentBuffer&, bool* raisedException = 0); 69 70private: 71 JSC::Strong<JSC::JSObject> m_callback; 72 JSC::Strong<JSDOMGlobalObject> m_globalObject; 73#ifndef NDEBUG 74 ThreadIdentifier m_thread; 75#endif 76}; 77 78class DeleteCallbackDataTask : public ScriptExecutionContext::Task { 79public: 80 static PassOwnPtr<DeleteCallbackDataTask> create(JSCallbackData* data) 81 { 82 return adoptPtr(new DeleteCallbackDataTask(data)); 83 } 84 85 virtual void performTask(ScriptExecutionContext*) 86 { 87 delete m_data; 88 } 89 virtual bool isCleanupTask() const { return true; } 90private: 91 92 DeleteCallbackDataTask(JSCallbackData* data) : m_data(data) {} 93 94 JSCallbackData* m_data; 95}; 96 97} // namespace WebCore 98 99#endif // JSCallbackData_h 100