singleton.h

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// Copyright (c) 2024 anabrid GmbH
// Contact: https://www.anabrid.com/licensing/
//
// SPDX-License-Identifier: MIT OR GPL-2.0-or-later
 
#pragma once
 
namespace utils {
 
template <class T> class Singleton {
public:
  static T &get() {
    static T instance;
    return instance;
  }
};
 
template <class T> class HeapSingleton {
public:
  static T &get() {
    static T *instance = nullptr;
    if(!instance) {
      instance = new T{};
    }
    return *instance;
  }
};
 
} // ns utils