Singleton.h

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/*
 * This is a part of the Uniot project.
 * Copyright (C) 2016-2024 Uniot <contact@uniot.io>
 *
 * 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
 
namespace uniot {

template <typename Derived>
class Singleton {
 public:
  Singleton(const Singleton&) = delete;

  Singleton& operator=(const Singleton&) = delete;

  static inline Derived& getInstance() {
    static Derived instance;
    return instance;
  }
 
 protected:
  Singleton() = default;

  ~Singleton() = default;
};

}  // namespace uniot