2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 * (C) 2000 Antti Koivisto (koivisto@kde.org)
4 * (C) 2000 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2003, 2005, 2008 Apple Inc. All rights reserved.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library 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.
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 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
27 #include "wtf/RefPtr.h"
31 template <typename T> class DataRef {
33 const T* get() const { return m_data.get(); }
35 const T& operator*() const { return *get(); }
36 const T* operator->() const { return get(); }
40 if (!m_data->hasOneRef())
41 m_data = m_data->copy();
51 bool operator==(const DataRef<T>& o) const
55 return m_data == o.m_data || *m_data == *o.m_data;
58 bool operator!=(const DataRef<T>& o) const
62 return m_data != o.m_data && *m_data != *o.m_data;