1/*
2 *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
3 *  Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Apple Inc. All rights reserved.
4 *  Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
5 *  Copyright (C) 2009 Google, Inc. All rights reserved.
6 *
7 *  This library is free software; you can redistribute it and/or
8 *  modify it under the terms of the GNU Lesser General Public
9 *  License as published by the Free Software Foundation; either
10 *  version 2 of the License, or (at your option) any later version.
11 *
12 *  This library is distributed in the hope that it will be useful,
13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 *  Lesser General Public License for more details.
16 *
17 *  You should have received a copy of the GNU Lesser General Public
18 *  License along with this library; if not, write to the Free Software
19 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
20 */
21
22#ifndef DOMObjectHashTableMap_h
23#define DOMObjectHashTableMap_h
24
25#include <runtime/Lookup.h>
26#include <wtf/HashMap.h>
27
28namespace JSC {
29    class VM;
30}
31
32namespace WebCore {
33
34// Map from static HashTable instances to per-GlobalData ones.
35class DOMObjectHashTableMap {
36public:
37    static DOMObjectHashTableMap& mapFor(JSC::VM&);
38
39    ~DOMObjectHashTableMap()
40    {
41        for (HashMap<const JSC::HashTable*, JSC::HashTable>::iterator iter = m_map.begin(); iter != m_map.end(); ++iter)
42            iter->value.deleteTable();
43    }
44
45    const JSC::HashTable& get(const JSC::HashTable& staticTable)
46    {
47        HashMap<const JSC::HashTable*, JSC::HashTable>::iterator iter = m_map.find(&staticTable);
48        if (iter != m_map.end())
49            return iter->value;
50        return m_map.set(&staticTable, staticTable.copy()).iterator->value;
51    }
52
53private:
54    HashMap<const JSC::HashTable*, JSC::HashTable> m_map;
55};
56
57} // namespace WebCore
58
59#endif // DOMObjectHashTableMap_h
60