Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 0 insertions, 296 deletions

diff --git a/JavaScriptCore/runtime/Structure.h b/JavaScriptCore/runtime/Structure.h
deleted file mode 100644
index f480051..0000000
--- a/JavaScriptCore/runtime/Structure.h
+++ /dev/null
@@ -1,296 +0,0 @@
-/*
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. OR
- * 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 Structure_h
-#define Structure_h
-
-#include "Identifier.h"
-#include "JSType.h"
-#include "JSValue.h"
-#include "PropertyMapHashTable.h"
-#include "PropertyNameArray.h"
-#include "Protect.h"
-#include "StructureChain.h"
-#include "StructureTransitionTable.h"
-#include "JSTypeInfo.h"
-#include "UString.h"
-#include "WeakGCPtr.h"
-#include <wtf/PassRefPtr.h>
-#include <wtf/RefCounted.h>
-
-#ifndef NDEBUG
-#define DUMP_PROPERTYMAP_STATS 0
-#else
-#define DUMP_PROPERTYMAP_STATS 0
-#endif
-
-namespace JSC {
-
-    class MarkStack;
-    class PropertyNameArray;
-    class PropertyNameArrayData;
-
-    enum EnumerationMode {
-        ExcludeDontEnumProperties,
-        IncludeDontEnumProperties
-    };
-
-    class Structure : public RefCounted<Structure> {
-    public:
-        friend class JIT;
-        friend class StructureTransitionTable;
-        static PassRefPtr<Structure> create(JSValue prototype, const TypeInfo& typeInfo, unsigned anonymousSlotCount)
-        {
-            return adoptRef(new Structure(prototype, typeInfo, anonymousSlotCount));
-        }
-
-        static void startIgnoringLeaks();
-        static void stopIgnoringLeaks();
-
-        static void dumpStatistics();
-
-        static PassRefPtr<Structure> addPropertyTransition(Structure*, const Identifier& propertyName, unsigned attributes, JSCell* specificValue, size_t& offset);
-        static PassRefPtr<Structure> addPropertyTransitionToExistingStructure(Structure*, const Identifier& propertyName, unsigned attributes, JSCell* specificValue, size_t& offset);
-        static PassRefPtr<Structure> removePropertyTransition(Structure*, const Identifier& propertyName, size_t& offset);
-        static PassRefPtr<Structure> changePrototypeTransition(Structure*, JSValue prototype);
-        static PassRefPtr<Structure> despecifyFunctionTransition(Structure*, const Identifier&);
-        static PassRefPtr<Structure> getterSetterTransition(Structure*);
-        static PassRefPtr<Structure> toCacheableDictionaryTransition(Structure*);
-        static PassRefPtr<Structure> toUncacheableDictionaryTransition(Structure*);
-
-        PassRefPtr<Structure> flattenDictionaryStructure(JSObject*);
-
-        ~Structure();
-
-        // These should be used with caution.  
-        size_t addPropertyWithoutTransition(const Identifier& propertyName, unsigned attributes, JSCell* specificValue);
-        size_t removePropertyWithoutTransition(const Identifier& propertyName);
-        void setPrototypeWithoutTransition(JSValue prototype) { m_prototype = prototype; }
-        
-        bool isDictionary() const { return m_dictionaryKind != NoneDictionaryKind; }
-        bool isUncacheableDictionary() const { return m_dictionaryKind == UncachedDictionaryKind; }
-
-        const TypeInfo& typeInfo() const { return m_typeInfo; }
-
-        JSValue storedPrototype() const { return m_prototype; }
-        JSValue prototypeForLookup(ExecState*) const;
-        StructureChain* prototypeChain(ExecState*) const;
-
-        Structure* previousID() const { return m_previous.get(); }
-
-        void growPropertyStorageCapacity();
-        unsigned propertyStorageCapacity() const { return m_propertyStorageCapacity; }
-        unsigned propertyStorageSize() const { return m_anonymousSlotCount + (m_propertyTable ? m_propertyTable->keyCount + (m_propertyTable->deletedOffsets ? m_propertyTable->deletedOffsets->size() : 0) : static_cast<unsigned>(m_offset + 1)); }
-        bool isUsingInlineStorage() const;
-
-        size_t get(const Identifier& propertyName);
-        size_t get(const StringImpl* rep, unsigned& attributes, JSCell*& specificValue);
-        size_t get(const Identifier& propertyName, unsigned& attributes, JSCell*& specificValue)
-        {
-            ASSERT(!propertyName.isNull());
-            return get(propertyName.impl(), attributes, specificValue);
-        }
-        bool transitionedFor(const JSCell* specificValue)
-        {
-            return m_specificValueInPrevious == specificValue;
-        }
-        bool hasTransition(StringImpl*, unsigned attributes);
-        bool hasTransition(const Identifier& propertyName, unsigned attributes)
-        {
-            return hasTransition(propertyName.impl(), attributes);
-        }
-
-        bool hasGetterSetterProperties() const { return m_hasGetterSetterProperties; }
-        void setHasGetterSetterProperties(bool hasGetterSetterProperties) { m_hasGetterSetterProperties = hasGetterSetterProperties; }
-
-        bool hasNonEnumerableProperties() const { return m_hasNonEnumerableProperties; }
-
-        bool hasAnonymousSlots() const { return !!m_anonymousSlotCount; }
-        unsigned anonymousSlotCount() const { return m_anonymousSlotCount; }
-        
-        bool isEmpty() const { return m_propertyTable ? !m_propertyTable->keyCount : m_offset == noOffset; }
-
-        void despecifyDictionaryFunction(const Identifier& propertyName);
-        void disableSpecificFunctionTracking() { m_specificFunctionThrashCount = maxSpecificFunctionThrashCount; }
-
-        void setEnumerationCache(JSPropertyNameIterator* enumerationCache); // Defined in JSPropertyNameIterator.h.
-        void clearEnumerationCache(JSPropertyNameIterator* enumerationCache); // Defined in JSPropertyNameIterator.h.
-        JSPropertyNameIterator* enumerationCache(); // Defined in JSPropertyNameIterator.h.
-        void getPropertyNames(PropertyNameArray&, EnumerationMode mode);
-        
-    private:
-
-        Structure(JSValue prototype, const TypeInfo&, unsigned anonymousSlotCount);
-        
-        typedef enum { 
-            NoneDictionaryKind = 0,
-            CachedDictionaryKind = 1,
-            UncachedDictionaryKind = 2
-        } DictionaryKind;
-        static PassRefPtr<Structure> toDictionaryTransition(Structure*, DictionaryKind);
-
-        size_t put(const Identifier& propertyName, unsigned attributes, JSCell* specificValue);
-        size_t remove(const Identifier& propertyName);
-
-        void expandPropertyMapHashTable();
-        void rehashPropertyMapHashTable();
-        void rehashPropertyMapHashTable(unsigned newTableSize);
-        void createPropertyMapHashTable();
-        void createPropertyMapHashTable(unsigned newTableSize);
-        void insertIntoPropertyMapHashTable(const PropertyMapEntry&);
-        void checkConsistency();
-
-        bool despecifyFunction(const Identifier&);
-        void despecifyAllFunctions();
-
-        PropertyMapHashTable* copyPropertyTable();
-        void materializePropertyMap();
-        void materializePropertyMapIfNecessary()
-        {
-            if (m_propertyTable || !m_previous)             
-                return;
-            materializePropertyMap();
-        }
-
-        signed char transitionCount() const
-        {
-            // Since the number of transitions is always the same as m_offset, we keep the size of Structure down by not storing both.
-            return m_offset == noOffset ? 0 : m_offset + 1;
-        }
-
-        typedef std::pair<Structure*, Structure*> Transition;
-        typedef HashMap<StructureTransitionTableHash::Key, Transition, StructureTransitionTableHash, StructureTransitionTableHashTraits> TransitionTable;
-
-        inline bool transitionTableContains(const StructureTransitionTableHash::Key& key, JSCell* specificValue);
-        inline void transitionTableRemove(const StructureTransitionTableHash::Key& key, JSCell* specificValue);
-        inline void transitionTableAdd(const StructureTransitionTableHash::Key& key, Structure* structure, JSCell* specificValue);
-        inline bool transitionTableHasTransition(const StructureTransitionTableHash::Key& key) const;
-        inline Structure* transitionTableGet(const StructureTransitionTableHash::Key& key, JSCell* specificValue) const;
-
-        TransitionTable* transitionTable() const { ASSERT(!m_isUsingSingleSlot); return m_transitions.m_table; }
-        inline void setTransitionTable(TransitionTable* table);
-        Structure* singleTransition() const { ASSERT(m_isUsingSingleSlot); return m_transitions.m_singleTransition; }
-        void setSingleTransition(Structure* structure) { ASSERT(m_isUsingSingleSlot); m_transitions.m_singleTransition = structure; }
-        
-        bool isValid(ExecState*, StructureChain* cachedPrototypeChain) const;
-
-        static const unsigned emptyEntryIndex = 0;
-    
-        static const signed char s_maxTransitionLength = 64;
-
-        static const signed char noOffset = -1;
-
-        static const unsigned maxSpecificFunctionThrashCount = 3;
-
-        TypeInfo m_typeInfo;
-
-        JSValue m_prototype;
-        mutable RefPtr<StructureChain> m_cachedPrototypeChain;
-
-        RefPtr<Structure> m_previous;
-        RefPtr<StringImpl> m_nameInPrevious;
-        JSCell* m_specificValueInPrevious;
-
-        // 'm_isUsingSingleSlot' indicates whether we are using the single transition optimisation.
-        union {
-            TransitionTable* m_table;
-            Structure* m_singleTransition;
-        } m_transitions;
-
-        WeakGCPtr<JSPropertyNameIterator> m_enumerationCache;
-
-        PropertyMapHashTable* m_propertyTable;
-
-        uint32_t m_propertyStorageCapacity;
-
-        // m_offset does not account for anonymous slots
-        signed char m_offset;
-
-        unsigned m_dictionaryKind : 2;
-        bool m_isPinnedPropertyTable : 1;
-        bool m_hasGetterSetterProperties : 1;
-        bool m_hasNonEnumerableProperties : 1;
-#if COMPILER(WINSCW)
-        // Workaround for Symbian WINSCW compiler that cannot resolve unsigned type of the declared 
-        // bitfield, when used as argument in make_pair() function calls in structure.ccp.
-        // This bitfield optimization is insignificant for the Symbian emulator target.
-        unsigned m_attributesInPrevious;
-#else
-        unsigned m_attributesInPrevious : 7;
-#endif
-        unsigned m_specificFunctionThrashCount : 2;
-        unsigned m_anonymousSlotCount : 5;
-        unsigned m_isUsingSingleSlot : 1;
-        // 4 free bits
-    };
-
-    inline size_t Structure::get(const Identifier& propertyName)
-    {
-        ASSERT(!propertyName.isNull());
-
-        materializePropertyMapIfNecessary();
-        if (!m_propertyTable)
-            return WTF::notFound;
-
-        StringImpl* rep = propertyName.impl();
-
-        unsigned i = rep->existingHash();
-
-#if DUMP_PROPERTYMAP_STATS
-        ++numProbes;
-#endif
-
-        unsigned entryIndex = m_propertyTable->entryIndices[i & m_propertyTable->sizeMask];
-        if (entryIndex == emptyEntryIndex)
-            return WTF::notFound;
-
-        if (rep == m_propertyTable->entries()[entryIndex - 1].key)
-            return m_propertyTable->entries()[entryIndex - 1].offset;
-
-#if DUMP_PROPERTYMAP_STATS
-        ++numCollisions;
-#endif
-
-        unsigned k = 1 | WTF::doubleHash(rep->existingHash());
-
-        while (1) {
-            i += k;
-
-#if DUMP_PROPERTYMAP_STATS
-            ++numRehashes;
-#endif
-
-            entryIndex = m_propertyTable->entryIndices[i & m_propertyTable->sizeMask];
-            if (entryIndex == emptyEntryIndex)
-                return WTF::notFound;
-
-            if (rep == m_propertyTable->entries()[entryIndex - 1].key)
-                return m_propertyTable->entries()[entryIndex - 1].offset;
-        }
-    }
-
-} // namespace JSC
-
-#endif // Structure_h