[Stupid question] On singleton holder

[atticmusic]

A stupid question.

In the singleton document,

Code: Select all

#include "Poco/SingletonHolder.h"
class MySingleton
{
public:
   MySingleton()
   {
      // ...
   }
   ~MySingleton()
   {
      // ...
   }
   // ...
   static MySingleton& instance()
   {
      static Poco::SingletonHolder<MySingleton> sh;
      return *sh.get();
   }
};


Cuz we cannot make the constructor and destructor private or protected,
doesn't it make it useless because we can still instantiate more than one instances from the class?

Thanks.