2 Copyright (C) 2016 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef DCPOMATIC_CONTENT_PART_H
21 #define DCPOMATIC_CONTENT_PART_H
24 #include <boost/weak_ptr.hpp>
25 #include <boost/thread/mutex.hpp>
33 ContentPart (Content* parent)
40 maybe_set (T& member, T new_value, int property) const
43 boost::mutex::scoped_lock lm (_mutex);
44 if (member == new_value) {
49 _parent->signal_changed (property);
54 maybe_set (boost::optional<T>& member, T new_value, int property) const
57 boost::mutex::scoped_lock lm (_mutex);
58 if (member && member.get() == new_value) {
63 _parent->signal_changed (property);
67 mutable boost::mutex _mutex;