Managing a singleton destructor

Question

The following small example implements a singleton pattern that I\'ve seen many times:

#include 

class SingletonTest {
private:
  Singleton         


        

Answer 1

...not exactly a direct answer, but too long for a comment - why not do the singleton this way:

class SingletonTest {
private:
  SingletonTest() {}
  ~SingletonTest() {
    std::cout << "Destructing!!" << std::endl;
  }

public:
  static SingletonTest& get_instance()  {
    static SingletonTest instance;
    return instance;
  }
};

Now you have a lazy singleton that will be destructed on exit... It's not any less re-entrant than your code...