how to delete singleton object

Question

Assuming this implementation of a singleton pattern ( of course we should avoid Singleton: it is just question), I have just been thinking about static object being created.

Answer 1

The classical singleton pattern does not describe the deletion aspect.

However, if I have to do it, I would start with a simple approach like the following (it is not fool-proof):

1) Similar to the static method for creating/retrieving the singleton object, say createObject(), there is a static method for destructing the singleton object, say destructObject()

2) There is a counter which counts the current number of objects in the system;

• it starts at 0
• on createObject() call, it increments by 1
• on deleteObject() call, it decrements by 1.
  • If it reaches 0, then the delete is called to actually destruct the object