//
// File   : SingletonBase.hh
//
// Purpose: Declaration of the class SingletonBase
//
// $Id: SingletonBase.hh 8758 2010-09-27 12:16:24Z mathes $
//



/** @file SingletonBase.hh
  * Declaration of the class SingletonBase.
  * @author H.-J. Mathes, FzK
  */


#ifndef _FdUtil_SingletonBase_hh_
#define _FdUtil_SingletonBase_hh_

#include <string>

#ifndef NO_VERSION
# include <FdUtilVersion.hh>
#endif // NO_VERSION

namespace FdUtil {

// --- forward declaration(s)

class SingletonRegistry;

/** This class should serve as teh base class for all singletons.
  *
  * It contains a mechanism which cares about the proper cleanup of singletons
  * using the atexit() system function.
  */
class SingletonBase {
    friend class SingletonRegistry;

public:
    /**  */
    SingletonBase(std::string name="unnamed");
    
    /**  */
    const std::string& GetName()
     { return fName; }

    /**  */
    static void SetPrintLevel(unsigned int level=1);
    
protected:
    /**  */
    virtual ~SingletonBase();

private:
    // these ones don't exist
    SingletonBase(const SingletonBase&);
    SingletonBase& operator=(const SingletonBase&);
    
    std::string   fName;
};

} // FdUtil 

#endif  // _FdUtil_SingletonBase_hh_