1// -*- mode: c++; c-basic-offset: 4 -*-
2/*
3 * Copyright (C) 2008 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#ifndef BatchedTransitionOptimizer_h
28#define BatchedTransitionOptimizer_h
29
30#include "JSObject.h"
31
32namespace JSC {
33
34    class BatchedTransitionOptimizer {
35        WTF_MAKE_NONCOPYABLE(BatchedTransitionOptimizer);
36    public:
37        BatchedTransitionOptimizer(JSGlobalData& globalData, JSObject* object)
38            : m_globalData(&globalData)
39            , m_object(object)
40        {
41            if (!m_object->structure()->isDictionary())
42                m_object->setStructure(globalData, Structure::toCacheableDictionaryTransition(globalData, m_object->structure()));
43        }
44
45        ~BatchedTransitionOptimizer()
46        {
47            m_object->flattenDictionaryObject(*m_globalData);
48        }
49
50    private:
51        JSGlobalData* m_globalData;
52        JSObject* m_object;
53    };
54
55} // namespace JSC
56
57#endif // BatchedTransitionOptimizer_h
58