Source/JavaScriptCore/API/JSCallbackFunction.cpp

/*
 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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#include "config.h"
#include "JSCallbackFunction.h"

#include "APIShims.h"
#include "APICast.h"
#include "CodeBlock.h"
#include "ExceptionHelpers.h"
#include "JSFunction.h"
#include "FunctionPrototype.h"
#include <runtime/JSGlobalObject.h>
#include <runtime/JSLock.h>
#include <wtf/Vector.h>

namespace JSC {

ASSERT_CLASS_FITS_IN_CELL(JSCallbackFunction);

const ClassInfo JSCallbackFunction::s_info = { "CallbackFunction", &InternalFunction::s_info, 0, 0 };

JSCallbackFunction::JSCallbackFunction(ExecState* exec, JSGlobalObject* globalObject, JSObjectCallAsFunctionCallback callback, const Identifier& name)
    : InternalFunction(&exec->globalData(), globalObject, globalObject->callbackFunctionStructure(), name)
    , m_callback(callback)
{
    ASSERT(inherits(&s_info));
}

EncodedJSValue JSCallbackFunction::call(ExecState* exec)
{
    JSContextRef execRef = toRef(exec);
    JSObjectRef functionRef = toRef(exec->callee());
    JSObjectRef thisObjRef = toRef(exec->hostThisValue().toThisObject(exec));

    int argumentCount = static_cast<int>(exec->argumentCount());
    Vector<JSValueRef, 16> arguments(argumentCount);
    for (int i = 0; i < argumentCount; i++)
        arguments[i] = toRef(exec, exec->argument(i));

    JSValueRef exception = 0;
    JSValueRef result;
    {
        APICallbackShim callbackShim(exec);
        result = static_cast<JSCallbackFunction*>(toJS(functionRef))->m_callback(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);
    }
    if (exception)
        throwError(exec, toJS(exec, exception));

    return JSValue::encode(toJS(exec, result));
}

CallType JSCallbackFunction::getCallData(CallData& callData)
{
    callData.native.function = call;
    return CallTypeHost;
}

} // namespace JSC