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/*
* Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JSActivation_h
#define JSActivation_h
#include "CodeBlock.h"
#include "JSVariableObject.h"
#include "SymbolTable.h"
#include "Nodes.h"
namespace JSC {
class Arguments;
class Register;
class JSActivation : public JSVariableObject {
typedef JSVariableObject Base;
public:
JSActivation(CallFrame*, NonNullPassRefPtr<FunctionExecutable>);
virtual ~JSActivation();
virtual void markChildren(MarkStack&);
virtual bool isDynamicScope(bool& requiresDynamicChecks) const;
virtual bool isActivationObject() const { return true; }
virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode);
virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes);
virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
virtual JSObject* toThisObject(ExecState*) const;
virtual JSValue toStrictThisObject(ExecState*) const;
void copyRegisters(JSGlobalData&);
static const ClassInfo s_info;
static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info); }
protected:
static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
private:
struct JSActivationData : public JSVariableObjectData {
JSActivationData(NonNullPassRefPtr<FunctionExecutable> _functionExecutable, Register* registers)
: JSVariableObjectData(_functionExecutable->symbolTable(), registers)
, functionExecutable(_functionExecutable)
{
// We have to manually ref and deref the symbol table as JSVariableObjectData
// doesn't know about SharedSymbolTable
functionExecutable->symbolTable()->ref();
}
~JSActivationData()
{
static_cast<SharedSymbolTable*>(symbolTable)->deref();
}
RefPtr<FunctionExecutable> functionExecutable;
};
bool symbolTableGet(const Identifier&, PropertySlot&);
bool symbolTableGet(const Identifier&, PropertyDescriptor&);
bool symbolTableGet(const Identifier&, PropertySlot&, bool& slotIsWriteable);
bool symbolTablePut(JSGlobalData&, const Identifier&, JSValue);
bool symbolTablePutWithAttributes(JSGlobalData&, const Identifier&, JSValue, unsigned attributes);
static JSValue argumentsGetter(ExecState*, JSValue, const Identifier&);
NEVER_INLINE PropertySlot::GetValueFunc getArgumentsGetter();
JSActivationData* d() const { return static_cast<JSActivationData*>(JSVariableObject::d); }
};
JSActivation* asActivation(JSValue);
inline JSActivation* asActivation(JSValue value)
{
ASSERT(asObject(value)->inherits(&JSActivation::s_info));
return static_cast<JSActivation*>(asObject(value));
}
} // namespace JSC
#endif // JSActivation_h
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