Singleton.hh

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// $Id: Singleton.hh,v 1.3 2007/04/27 01:54:32 jeremy Exp $

#ifndef LCDD_SINGLETON_HH
#define LCDD_SINGLETON_HH 1

template<class T>
class Singleton
{
public:
  static T* instance();
  void release();
  
  Singleton();
  ~Singleton();
  
private:
  static T* m_singleton;
};

template<class T> T* Singleton<T>::m_singleton = 0;

template<class T>
Singleton<T>::Singleton()
{}

template<class T>
Singleton<T>::~Singleton()
{}

template<class T>
T* Singleton<T>::instance()
{
  if (m_singleton == 0) {
    m_singleton = new T;
  }
  return m_singleton;
}

template<class T>
void Singleton<T>::release ()
{
  if (m_singleton == 0)
    return;
  delete m_singleton;
  m_singleton = 0;
}

#endif

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