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1 /*
2  * Copyright (C) 2008, 2009 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 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 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 #ifndef JSStaticScopeObject_h
27 #define JSStaticScopeObject_h
28 
29 #include "JSVariableObject.h"
30 
31 namespace JSC{
32 
33     class JSStaticScopeObject : public JSVariableObject {
34     public:
JSStaticScopeObject(ExecState * exec,const Identifier & ident,JSValue value,unsigned attributes)35         JSStaticScopeObject(ExecState* exec, const Identifier& ident, JSValue value, unsigned attributes)
36             : JSVariableObject(exec->globalData(), exec->globalData().staticScopeStructure.get(), &m_symbolTable, reinterpret_cast<Register*>(&m_registerStore + 1))
37         {
38             m_registerStore.set(exec->globalData(), this, value);
39             symbolTable().add(ident.impl(), SymbolTableEntry(-1, attributes));
40         }
41 
42         virtual void markChildren(MarkStack&);
43         bool isDynamicScope(bool& requiresDynamicChecks) const;
44         virtual JSObject* toThisObject(ExecState*) const;
45         virtual JSValue toStrictThisObject(ExecState*) const;
46         virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
47         virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
48         void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes);
49 
createStructure(JSGlobalData & globalData,JSValue proto)50         static Structure* createStructure(JSGlobalData& globalData, JSValue proto) { return Structure::create(globalData, proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info); }
51 
52     protected:
53         static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
54 
55     private:
56         SymbolTable m_symbolTable;
57         WriteBarrier<Unknown> m_registerStore;
58     };
59 
60 }
61 
62 #endif // JSStaticScopeObject_h
63