JSPropertyNameIterator.h [plain text]
#ifndef JSPropertyNameIterator_h
#define JSPropertyNameIterator_h
#include "JSObject.h"
#include "JSString.h"
#include "Operations.h"
#include "PropertyNameArray.h"
namespace JSC {
class Identifier;
class JSObject;
class LLIntOffsetsExtractor;
class JSPropertyNameIterator : public JSCell {
friend class JIT;
public:
typedef JSCell Base;
static JSPropertyNameIterator* create(ExecState*, JSObject*);
static JSPropertyNameIterator* create(ExecState* exec, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot)
{
JSPropertyNameIterator* iterator = new (NotNull, allocateCell<JSPropertyNameIterator>(*exec->heap())) JSPropertyNameIterator(exec, propertyNameArrayData, numCacheableSlot);
iterator->finishCreation(exec, propertyNameArrayData);
return iterator;
}
static void destroy(JSCell*);
static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(globalData, globalObject, prototype, TypeInfo(CompoundType, OverridesVisitChildren), &s_info);
}
static void visitChildren(JSCell*, SlotVisitor&);
bool getOffset(size_t i, int& offset)
{
if (i >= m_numCacheableSlots)
return false;
offset = i;
return true;
}
JSValue get(ExecState*, JSObject*, size_t i);
size_t size() { return m_jsStringsSize; }
void setCachedStructure(JSGlobalData& globalData, Structure* structure)
{
ASSERT(!m_cachedStructure);
ASSERT(structure);
m_cachedStructure.set(globalData, this, structure);
}
Structure* cachedStructure() { return m_cachedStructure.get(); }
void setCachedPrototypeChain(JSGlobalData& globalData, StructureChain* cachedPrototypeChain) { m_cachedPrototypeChain.set(globalData, this, cachedPrototypeChain); }
StructureChain* cachedPrototypeChain() { return m_cachedPrototypeChain.get(); }
static const ClassInfo s_info;
protected:
void finishCreation(ExecState* exec, PropertyNameArrayData* propertyNameArrayData)
{
Base::finishCreation(exec->globalData());
PropertyNameArrayData::PropertyNameVector& propertyNameVector = propertyNameArrayData->propertyNameVector();
for (size_t i = 0; i < m_jsStringsSize; ++i)
m_jsStrings[i].set(exec->globalData(), this, jsOwnedString(exec, propertyNameVector[i].ustring()));
}
private:
friend class LLIntOffsetsExtractor;
JSPropertyNameIterator(ExecState*, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot);
WriteBarrier<Structure> m_cachedStructure;
WriteBarrier<StructureChain> m_cachedPrototypeChain;
uint32_t m_numCacheableSlots;
uint32_t m_jsStringsSize;
OwnArrayPtr<WriteBarrier<Unknown> > m_jsStrings;
};
inline void Structure::setEnumerationCache(JSGlobalData& globalData, JSPropertyNameIterator* enumerationCache)
{
ASSERT(!isDictionary());
m_enumerationCache.set(globalData, this, enumerationCache);
}
inline JSPropertyNameIterator* Structure::enumerationCache()
{
return m_enumerationCache.get();
}
ALWAYS_INLINE JSPropertyNameIterator* Register::propertyNameIterator() const
{
return jsCast<JSPropertyNameIterator*>(jsValue().asCell());
}
}
#endif // JSPropertyNameIterator_h