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/*
* Copyright (C) 2013, 2014 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 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 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 IntendedStructureChain_h
#define IntendedStructureChain_h
#include "ConstantStructureCheck.h"
#include "Structure.h"
#include <wtf/RefCounted.h>
namespace JSC {
class CodeBlock;
class JSGlobalObject;
class StructureChain;
class VM;
struct DumpContext;
class IntendedStructureChain : public RefCounted<IntendedStructureChain> {
public:
IntendedStructureChain(JSGlobalObject* globalObject, JSValue prototype);
IntendedStructureChain(JSGlobalObject* globalObject, Structure*);
IntendedStructureChain(CodeBlock* codeBlock, Structure* head, Structure* prototypeStructure);
IntendedStructureChain(CodeBlock* codeBlock, Structure* head, StructureChain* chain);
IntendedStructureChain(CodeBlock* codeBlock, Structure* head, StructureChain* chain, unsigned count);
~IntendedStructureChain();
bool isStillValid() const;
bool matches(StructureChain*) const;
bool mayInterceptStoreTo(VM&, StringImpl* uid);
bool isNormalized();
bool takesSlowPathInDFGForImpureProperty();
JSValue prototype() const { return m_prototype; }
size_t size() const { return m_vector.size(); }
Structure* at(size_t index) const { return m_vector[index]; }
Structure* operator[](size_t index) const { return at(index); }
JSObject* terminalPrototype() const;
Structure* last() const { return m_vector.last(); }
bool operator==(const IntendedStructureChain&) const;
bool operator!=(const IntendedStructureChain& other) const
{
return !(*this == other);
}
void gatherChecks(ConstantStructureCheckVector&) const;
void visitChildren(SlotVisitor&);
void dump(PrintStream&) const;
void dumpInContext(PrintStream&, DumpContext*) const;
private:
JSGlobalObject* m_globalObject;
JSValue m_prototype;
Vector<Structure*> m_vector;
};
} // namespace JSC
#endif // IntendedStructureChain_h
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