JavaScriptCore/interpreter/CachedCall.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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/*
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 * Copyright (C) 2009 Apple Inc. All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
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 */
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#ifndef CachedCall_h
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#define CachedCall_h
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#include "CallFrameClosure.h"
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#include "JSFunction.h"
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#include "JSGlobalObject.h"
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#include "Interpreter.h"
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namespace JSC {
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    class CachedCall : public Noncopyable {
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    public:
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        CachedCall(CallFrame* callFrame, JSFunction* function, int argCount, JSValue* exception)
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            : m_valid(false)
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            , m_interpreter(callFrame->interpreter())
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            , m_exception(exception)
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            , m_globalObjectScope(callFrame, function->scope().globalObject())
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        {
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            ASSERT(!function->isHostFunction());
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            m_closure = m_interpreter->prepareForRepeatCall(function->jsExecutable(), callFrame, function, argCount, function->scope().node(), exception);
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            m_valid = !*exception;
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        }
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        JSValue call()
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        { 
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            ASSERT(m_valid);
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            return m_interpreter->execute(m_closure, m_exception);
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        }
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        void setThis(JSValue v) { m_closure.setArgument(0, v); }
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        void setArgument(int n, JSValue v) { m_closure.setArgument(n + 1, v); }
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        CallFrame* newCallFrame(ExecState* exec)
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        {
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            CallFrame* callFrame = m_closure.newCallFrame;
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            callFrame->setScopeChain(exec->scopeChain());
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            return callFrame;
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        }
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        ~CachedCall()
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        {
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            if (m_valid)
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                m_interpreter->endRepeatCall(m_closure);
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        }
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    private:
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        bool m_valid;
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        Interpreter* m_interpreter;
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        JSValue* m_exception;
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        DynamicGlobalObjectScope m_globalObjectScope;
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        CallFrameClosure m_closure;
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    };
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}
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#endif