FFaSingelton.H

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// SPDX-FileCopyrightText: 2023 SAP SE
//
// SPDX-License-Identifier: Apache-2.0
//
// This file is part of FEDEM - https://openfedem.org
 
#ifndef FFA_SINGELTON_H
#define FFA_SINGELTON_H
 
 
template <class T, class Container = T> class FFaSingelton
{
protected:
  FFaSingelton() {}
  FFaSingelton(const FFaSingelton&) = delete;
  FFaSingelton& operator=(const FFaSingelton&) = delete;
 
public:
  static T* instance()
  {
    if (ourInstance == 0)
      ourInstance = new T();
    return ourInstance;
  }
 
  static void removeInstance()
  {
    if (ourInstance != 0)
      delete ourInstance;
    ourInstance = 0;
  }
 
  static bool allocated() { return ourInstance != 0; }
 
private:
  static T* ourInstance; 
};
 
 
template <class T, class Container>
T* FFaSingelton<T,Container>::ourInstance = 0;
 
#endif