1/* 2 * Copyright (C) 2006, 2008 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "JSCallbackFunction.h" 28 29#include "APIShims.h" 30#include "APICast.h" 31#include "CodeBlock.h" 32#include "Error.h" 33#include "ExceptionHelpers.h" 34#include "FunctionPrototype.h" 35#include "JSFunction.h" 36#include "JSGlobalObject.h" 37#include "JSLock.h" 38#include "Operations.h" 39#include <wtf/Vector.h> 40 41namespace JSC { 42 43ASSERT_HAS_TRIVIAL_DESTRUCTOR(JSCallbackFunction); 44 45const ClassInfo JSCallbackFunction::s_info = { "CallbackFunction", &InternalFunction::s_info, 0, 0, CREATE_METHOD_TABLE(JSCallbackFunction) }; 46 47JSCallbackFunction::JSCallbackFunction(JSGlobalObject* globalObject, Structure* structure, JSObjectCallAsFunctionCallback callback) 48 : InternalFunction(globalObject, structure) 49 , m_callback(callback) 50{ 51} 52 53void JSCallbackFunction::finishCreation(VM& vm, const String& name) 54{ 55 Base::finishCreation(vm, name); 56 ASSERT(inherits(&s_info)); 57} 58 59JSCallbackFunction* JSCallbackFunction::create(ExecState* exec, JSGlobalObject* globalObject, JSObjectCallAsFunctionCallback callback, const String& name) 60{ 61 JSCallbackFunction* function = new (NotNull, allocateCell<JSCallbackFunction>(*exec->heap())) JSCallbackFunction(globalObject, globalObject->callbackFunctionStructure(), callback); 62 function->finishCreation(exec->vm(), name); 63 return function; 64} 65 66EncodedJSValue JSCallbackFunction::call(ExecState* exec) 67{ 68 JSContextRef execRef = toRef(exec); 69 JSObjectRef functionRef = toRef(exec->callee()); 70 JSObjectRef thisObjRef = toRef(exec->hostThisValue().toThisObject(exec)); 71 72 size_t argumentCount = exec->argumentCount(); 73 Vector<JSValueRef, 16> arguments; 74 arguments.reserveInitialCapacity(argumentCount); 75 for (size_t i = 0; i < argumentCount; ++i) 76 arguments.uncheckedAppend(toRef(exec, exec->argument(i))); 77 78 JSValueRef exception = 0; 79 JSValueRef result; 80 { 81 APICallbackShim callbackShim(exec); 82 result = jsCast<JSCallbackFunction*>(toJS(functionRef))->m_callback(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception); 83 } 84 if (exception) 85 throwError(exec, toJS(exec, exception)); 86 87 // result must be a valid JSValue. 88 if (!result) 89 return JSValue::encode(jsUndefined()); 90 91 return JSValue::encode(toJS(exec, result)); 92} 93 94CallType JSCallbackFunction::getCallData(JSCell*, CallData& callData) 95{ 96 callData.native.function = call; 97 return CallTypeHost; 98} 99 100} // namespace JSC 101