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Singleton.h

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#ifndef DDI_Singleton_h
#define DDI_Singleton_h
#include "DetectorDescription/Base/interface/Ptr.h"

namespace DDI {
 template <class I> 
 class Singleton //: private I
 {
 public:
   typedef I value_type;
   //typedef I* pointer_type;
   
   //~Singleton() { delete instance_; }
   
   static value_type & instance() {
     static Ptr<I> value = new I;
     return *value;
   
     //static char buf [sizeof (I)];
     //static pointer_type obj = new (buf) I;
     //return obj;
   }
   
 private:  
   Singleton();
   Singleton& operator=(const Singleton &);
   //static pointer_type instance_;
 };
}
#endif

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