Singleton

The Singleton utility implements the Singleton design pattern, ensuring that a class has only one instance throughout the application's lifecycle and providing a global point of access to that instance. This pattern is particularly beneficial in scenarios where a single shared resource or manager is required.

Key Features:

• Prevents multiple instances of a class.

• Provides controlled access to the single instance.

• Utilizes modern C++ features like templates and static local variables for efficient implementation.

• Thread-safe initialization since C++11.

Template Parameters:

• Derived The class that inherits from Singleton. This allows the Singleton utility to manage the instantiation and access of the Derived class.

Constructors and Destructor:

• Singleton() Protected default constructor ensures that only derived classes can instantiate the Singleton.

• ~Singleton() Protected destructor ensures controlled destruction of the Singleton instance.

Assignment Operators:

• Singleton(const Singleton&) = delete; Deletes the copy constructor to prevent copying of the Singleton instance.

• Singleton& operator=(const Singleton&) = delete; Deletes the copy assignment operator to prevent assignment of the Singleton instance.

Methods:

• static inline Derived& getInstance() Provides access to the single instance of the Derived class. If the instance does not exist, it is created upon the first call.