Singleton.hpp

/*
 * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
 *
 * This software is distributed under the terms of the GNU General Public
 * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
 * the license.
 */

#pragma once

namespace corsika {
  template <typename T>
  class Singleton {
  public:
    static T& getInstance() {
      static T instance;
      return instance;
    }

    Singleton(const Singleton&) =
        delete; // Singleton Classes should not be copied. Removes move constructor and
                // move assignment as well
    Singleton& operator=(const Singleton&) =
        delete; // Singleton Classes should not be copied.

  protected:
    // derived class can call ctor and dtor
    Singleton() {}
    ~Singleton() {}
  };

} // namespace corsika