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/*
Copyright (C) 2020 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DCPOMATIC_WEAK_FILM_H
#define DCPOMATIC_WEAK_FILM_H
#include "dcpomatic_assert.h"
class Film;
template <class T>
class WeakFilmTemplate
{
public:
WeakFilmTemplate (std::weak_ptr<T> f)
: _film(f)
{}
protected:
std::weak_ptr<T> _film;
std::shared_ptr<T> film () const {
std::shared_ptr<T> f = _film.lock();
DCPOMATIC_ASSERT (f);
return f;
}
};
typedef WeakFilmTemplate<const Film> WeakConstFilm;
typedef WeakFilmTemplate<Film> WeakFilm;
#endif
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