/* * Copyright (C) 2011 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. */ #ifndef StorageBarrier_h #define StorageBarrier_h #include "JSGlobalData.h" #include "WriteBarrier.h" namespace JSC { typedef WriteBarrierBase<Unknown>* PropertyStorage; typedef const WriteBarrierBase<Unknown>* ConstPropertyStorage; class StorageBarrier { public: enum UncheckedTag { Unchecked }; StorageBarrier(JSGlobalData& globalData, JSCell* owner, PropertyStorage storage) { set(globalData, owner, storage); } StorageBarrier(PropertyStorage storage, UncheckedTag) { set(storage, Unchecked); } void set(JSGlobalData&, JSCell*, PropertyStorage newStorage) { m_storage = newStorage; } void set(PropertyStorage newStorage, UncheckedTag) { m_storage = newStorage; } WriteBarrierBase<Unknown>* operator->() const { return m_storage; } WriteBarrierBase<Unknown>* operator->() { return m_storage; } WriteBarrierBase<Unknown> operator*() const { return *m_storage; } WriteBarrierBase<Unknown> operator*() { return *m_storage; } const WriteBarrierBase<Unknown>& operator[](size_t i) const { return m_storage[i]; } WriteBarrierBase<Unknown>& operator[](size_t i) { return m_storage[i]; } ConstPropertyStorage get() const { return m_storage; } PropertyStorage get() { return m_storage; } private: PropertyStorage m_storage; }; } #endif