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 <wtf/Noncopyable.h>

    31 #include "JSObject.h"

    32 

    33 namespace JSC {

    34 

    35     class BatchedTransitionOptimizer : public Noncopyable {

    36     public:

    37         BatchedTransitionOptimizer(JSObject* object)

    38             : m_object(object)

    39         {

    40             if (!m_object->structure()->isDictionary())

    41                 m_object->setStructure(Structure::toCacheableDictionaryTransition(m_object->structure()));

    42         }

    43 

    44         ~BatchedTransitionOptimizer()

    45         {

    46             m_object->flattenDictionaryObject();

    47         }

    48 

    49     private:

    50         JSObject* m_object;

    51     };

    52 

    53 } // namespace JSC

    54 

    55 #endif // BatchedTransitionOptimizer_h