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/*
* 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
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