C Singleton design pattern

0 votes

I recently came upon a C++ realization/implementation of the Singleton design pattern. 

It looked like this (I took it from a real-life example):

// a lot of methods are omitted here
class Singleton
{
   public:
       static Singleton* getInstance( );
       ~Singleton( );
   private:
       Singleton( );
       static Singleton* instance;
};

I may conclude from this declaration that the instance field is created on the heap. 

This indicates that memory has been allocated. 

What is entirely unknown to me is when the memory will be deallocated. 

Is there a problem or a memory leak? 

There appears to be an issue with the implementation.

My primary concern is how to execute it correctly.

Jul 4, 2022 in C++ by Nicholas
• 7,760 points
263 views

No answer to this question. Be the first to respond.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.

Related Questions In C++

0 votes
1 answer

Declare abstract class in c++

An abstract class is one that is intended to be used as a base class .  At least one pure virtual function exists in an abstract class.  A pure virtual function is declared in the class declaration by using a pure specifier (= 0) in the declaration of a virtual member function. Here is an example of an abstract class: class AB { public: virtual void f() ...READ MORE

answered May 31, 2022 in C++ by Damon
• 4,960 points
461 views
0 votes
1 answer

What data structure is inside std::map in C++?

An associative container is std::map. The standard's ...READ MORE

answered May 31, 2022 in C++ by Damon
• 4,960 points
700 views
0 votes
1 answer

C++ `this` pointer

Pointer variables are used to store the ...READ MORE

answered May 31, 2022 in C++ by Damon
• 4,960 points
417 views
0 votes
1 answer

Easiest way to convert int to string in C++

C++ adds std::stoi (and variants for each numeric type) and std::to string, which are the C equivalents of atoi and itoa but expressed in terms of std::string #include <string> std::string s = std::to_string(42); Is therefore ...READ MORE

answered Jun 1, 2022 in C++ by Damon
• 4,960 points
1,185 views
0 votes
1 answer

The Definitive C++ Book Guide and List

For Beginner (includes those without coding experience) Programming: ...READ MORE

answered Jun 6, 2022 in C++ by pranav
• 2,590 points
647 views
0 votes
1 answer

Why does C++ need the scope resolution operator?

No. There is no scope resolution operator ...READ MORE

answered Jun 1, 2022 in C++ by Damon
• 4,960 points
739 views
0 votes
1 answer

What is an efficient way to implement a singleton pattern in Java?

Use an enum: public enum Foo { ...READ MORE

answered Jul 6, 2018 in Java by Akrati
• 3,190 points
818 views
0 votes
1 answer

setuptools: build shared libary from C++ code, then build Cython wrapper linked to shared libary

There is a seemingly undocumented feature of setup that ...READ MORE

answered Sep 11, 2018 in Python by Priyaj
• 58,090 points
576 views
0 votes
1 answer

setuptools: build shared libary from C++ code, then build Cython wrapper linked to shared libary

There is a seemingly undocumented feature of setup that ...READ MORE

answered Sep 21, 2018 in Python by Priyaj
• 58,090 points
2,228 views
0 votes
1 answer

How to pass large records to map/reduce tasks?

Hadoop is not designed for records about ...READ MORE

answered Sep 25, 2018 in Big Data Hadoop by Frankie
• 9,830 points
1,317 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP