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      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 <wtf/Platform.h>
     28 #include "JSCallbackFunction.h"
     29 
     30 #include "APIShims.h"
     31 #include "APICast.h"
     32 #include "CodeBlock.h"
     33 #include "JSFunction.h"
     34 #include "FunctionPrototype.h"
     35 #include <runtime/JSGlobalObject.h>
     36 #include <runtime/JSLock.h>
     37 #include <wtf/Vector.h>
     38 
     39 namespace JSC {
     40 
     41 ASSERT_CLASS_FITS_IN_CELL(JSCallbackFunction);
     42 
     43 const ClassInfo JSCallbackFunction::info = { "CallbackFunction", &InternalFunction::info, 0, 0 };
     44 
     45 JSCallbackFunction::JSCallbackFunction(ExecState* exec, JSObjectCallAsFunctionCallback callback, const Identifier& name)
     46     : InternalFunction(&exec->globalData(), exec->lexicalGlobalObject()->callbackFunctionStructure(), name)
     47     , m_callback(callback)
     48 {
     49 }
     50 
     51 JSValue JSCallbackFunction::call(ExecState* exec, JSObject* functionObject, JSValue thisValue, const ArgList& args)
     52 {
     53     JSContextRef execRef = toRef(exec);
     54     JSObjectRef functionRef = toRef(functionObject);
     55     JSObjectRef thisObjRef = toRef(thisValue.toThisObject(exec));
     56 
     57     int argumentCount = static_cast<int>(args.size());
     58     Vector<JSValueRef, 16> arguments(argumentCount);
     59     for (int i = 0; i < argumentCount; i++)
     60         arguments[i] = toRef(exec, args.at(i));
     61 
     62     JSValueRef exception = 0;
     63     JSValueRef result;
     64     {
     65         APICallbackShim callbackShim(exec);
     66         result = static_cast<JSCallbackFunction*>(functionObject)->m_callback(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);
     67     }
     68     if (exception)
     69         exec->setException(toJS(exec, exception));
     70 
     71     return toJS(exec, result);
     72 }
     73 
     74 CallType JSCallbackFunction::getCallData(CallData& callData)
     75 {
     76     callData.native.function = call;
     77     return CallTypeHost;
     78 }
     79 
     80 } // namespace JSC
     81