dsingleton.h

/*
 * Copyright (C) 2016 ~ 2017 Deepin Technology Co., Ltd.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * This program 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 Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef DSINGLETON_H
#define DSINGLETON_H
 
#include "dtkcore_global.h"
 
DCORE_BEGIN_NAMESPACE
 
template <class T>
class LIBDTKCORESHARED_EXPORT DSingleton
{
public:
    QT_DEPRECATED_X("Use ref")
    static inline T *instance()
    {
        static T  *_instance = new T;
        return _instance;
    }
 
    static T& ref()
    {
        static T instance;
        return instance;
    }
 
    DSingleton(T&&) = delete;
    DSingleton(const T&) = delete;
    void operator= (const T&) = delete;
 
protected:
    DSingleton() = default;
    virtual ~DSingleton() = default;
};
 
DCORE_END_NAMESPACE
 
#endif // DSINGLETON_H