Using the singleton pattern properly

In this recipe, we will learn how to properly implement the singleton pattern in C++11 and above and when it is appropriate to use the singleton pattern. This recipe is important as it will teach you when to use the singleton pattern, which provides a clear definition of a single global resource, ensuring the resource is kept global without the possibility of multiple copies.

Getting ready

Before beginning, please ensure that all of the technical requirements are met, including installing Ubuntu 18.04 or higher and running the following in a Terminal window:

> sudo apt-get install build-essential git cmake

This will ensure your operating system has the proper tools to compile and execute...