/* * Copyright (C) 2012-2017 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. AND ITS CONTRIBUTORS ``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 ITS 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. */ #pragma once #include "JSObject.h" namespace JSC { struct ClassInfo; class JSDestructibleObject : public JSNonFinalObject { public: typedef JSNonFinalObject Base; static const bool needsDestruction = true; template<typename CellType> static CompleteSubspace* subspaceFor(VM& vm) { return &vm.destructibleObjectSpace; } const ClassInfo* classInfo() const { return m_classInfo.unpoisoned(); } static ptrdiff_t classInfoOffset() { return OBJECT_OFFSETOF(JSDestructibleObject, m_classInfo); } protected: JSDestructibleObject(VM& vm, Structure* structure, Butterfly* butterfly = 0) : JSNonFinalObject(vm, structure, butterfly) , m_classInfo(structure->classInfo()) { ASSERT(m_classInfo); } private: PoisonedClassInfoPtr m_classInfo; }; } // namespace JSC