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29 #ifndef JSPropertyNameIterator_h
30 #define JSPropertyNameIterator_h
34 #include "Operations.h"
35 #include "PropertyNameArray.h"
42 class JSPropertyNameIterator : public JSCell {
48 static JSPropertyNameIterator* create(ExecState*, JSObject*);
49 static JSPropertyNameIterator* create(ExecState* exec, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot)
51 JSPropertyNameIterator* iterator = new (allocateCell<JSPropertyNameIterator>(*exec->heap())) JSPropertyNameIterator(exec, propertyNameArrayData, numCacheableSlot);
52 iterator->finishCreation(exec, propertyNameArrayData);
56 static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue prototype)
58 return Structure::create(globalData, globalObject, prototype, TypeInfo(CompoundType, OverridesVisitChildren), &s_info);
61 virtual void visitChildren(SlotVisitor&);
63 bool getOffset(size_t i, int& offset)
65 if (i >= m_numCacheableSlots)
71 JSValue get(ExecState*, JSObject*, size_t i);
72 size_t size() { return m_jsStringsSize; }
74 void setCachedStructure(JSGlobalData& globalData, Structure* structure)
76 ASSERT(!m_cachedStructure);
78 m_cachedStructure.set(globalData, this, structure);
80 Structure* cachedStructure() { return m_cachedStructure.get(); }
82 void setCachedPrototypeChain(JSGlobalData& globalData, StructureChain* cachedPrototypeChain) { m_cachedPrototypeChain.set(globalData, this, cachedPrototypeChain); }
83 StructureChain* cachedPrototypeChain() { return m_cachedPrototypeChain.get(); }
85 static const ClassInfo s_info;
88 void finishCreation(ExecState* exec, PropertyNameArrayData* propertyNameArrayData)
90 Base::finishCreation(exec->globalData());
91 PropertyNameArrayData::PropertyNameVector& propertyNameVector = propertyNameArrayData->propertyNameVector();
92 for (size_t i = 0; i < m_jsStringsSize; ++i)
93 m_jsStrings[i].set(exec->globalData(), this, jsOwnedString(exec, propertyNameVector[i].ustring()));
97 JSPropertyNameIterator(ExecState*, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot);
99 WriteBarrier<Structure> m_cachedStructure;
100 WriteBarrier<StructureChain> m_cachedPrototypeChain;
101 uint32_t m_numCacheableSlots;
102 uint32_t m_jsStringsSize;
103 OwnArrayPtr<WriteBarrier<Unknown> > m_jsStrings;
106 inline void Structure::setEnumerationCache(JSGlobalData& globalData, JSPropertyNameIterator* enumerationCache)
108 ASSERT(!isDictionary());
109 m_enumerationCache.set(globalData, this, enumerationCache);
112 inline JSPropertyNameIterator* Structure::enumerationCache()
114 return m_enumerationCache.get();
117 ALWAYS_INLINE JSPropertyNameIterator* Register::propertyNameIterator() const
119 return static_cast<JSPropertyNameIterator*>(jsValue().asCell());
124 #endif // JSPropertyNameIterator_h