Singleton.h

/* singleton.h */
 
/* Copyright (C) 2011-2024 Michael Lugmair (Lucio Carreras)
 *
 * This file is part of sayonara player
 *
 * This program 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 3 of the License, or
 * (at your option) 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 General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#pragma once
#ifndef SAYONARA_SINGLETON_H
#define SAYONARA_SINGLETON_H
 
#define _SINGLETON_BASIC_(class_name) friend class Application; \
                protected: \
                class_name( const class_name& other ) = delete; \
                class_name& operator=(const class_name& other) = delete; \
                class_name( const class_name&& other ) = delete; \
                class_name& operator=(const class_name&& other) = delete; \
                public: \
                static class_name *instance() \
                { static class_name instance; return &instance; } \
                virtual ~class_name ();
 
#define SINGLETON(class_name) _SINGLETON_BASIC_(class_name) \
                protected: \
                    class_name(); \
                private:
 
#define SINGLETON_QOBJECT(class_name) _SINGLETON_BASIC_(class_name) \
                protected: \
                    class_name(QObject* parent=nullptr); \
                private:
 
#endif // SAYONARA_SINGLETON_H