Source/WebCore/bindings/js/DOMObjectHashTableMap.h

/*
 *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
 *  Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Apple Inc. All rights reserved.
 *  Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
 *  Copyright (C) 2009 Google, Inc. All rights reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef DOMObjectHashTableMap_h
#define DOMObjectHashTableMap_h

#include <runtime/Lookup.h>
#include <wtf/HashMap.h>

namespace JSC {
    class VM;
}

namespace WebCore {

// Map from static HashTable instances to per-GlobalData ones.
class DOMObjectHashTableMap {
public:
    static DOMObjectHashTableMap& mapFor(JSC::VM&);

    ~DOMObjectHashTableMap()
    {
        for (HashMap<const JSC::HashTable*, JSC::HashTable>::iterator iter = m_map.begin(); iter != m_map.end(); ++iter)
            iter->value.deleteTable();
    }

    const JSC::HashTable& get(const JSC::HashTable& staticTable)
    {
        HashMap<const JSC::HashTable*, JSC::HashTable>::iterator iter = m_map.find(&staticTable);
        if (iter != m_map.end())
            return iter->value;
        return m_map.set(&staticTable, staticTable.copy()).iterator->value;
    }

private:
    HashMap<const JSC::HashTable*, JSC::HashTable> m_map;
};

} // namespace WebCore

#endif // DOMObjectHashTableMap_h