https://github.com/bardifarsi/singleton

This repository contains an implementation of the Singleton Lazy Initialization design pattern in C++20. The Singleton pattern ensures that a class has only one instance and provides a global point of access to that instance.
https://github.com/bardifarsi/singleton

concurrency concurrent-programming cpp cpp17 cpp20 lazy-init lazy-initialization lazyinitializationexception multi-thread multi-threaded multi-threading multi-threads multiprocessing multithreaded multithreading object-oriented-programming parallel-computing parallel-programming singleton singleton-pattern

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This repository contains an implementation of the Singleton Lazy Initialization design pattern in C++20. The Singleton pattern ensures that a class has only one instance and provides a global point of access to that instance.

• Host: GitHub
• URL: https://github.com/bardifarsi/singleton
• Owner: BardiFarsi
• License: gpl-3.0
• Created: 2024-04-11T18:51:58.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-07-24T02:11:01.000Z (over 1 year ago)
• Last Synced: 2025-05-21T17:41:16.510Z (6 months ago)
• Topics: concurrency, concurrent-programming, cpp, cpp17, cpp20, lazy-init, lazy-initialization, lazyinitializationexception, multi-thread, multi-threaded, multi-threading, multi-threads, multiprocessing, multithreaded, multithreading, object-oriented-programming, parallel-computing, parallel-programming, singleton, singleton-pattern
• Language: C++
• Homepage:
• Size: 31.3 KB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          

# Singleton Pattern with Lazy Initialization in C++

This project demonstrates the implementation of the Singleton design pattern with lazy initialization in C++. The Singleton pattern ensures that a class has only one instance and provides a global point of access to that instance.

## Features

- **Lazy Initialization**: The Singleton instance is created only when it is first requested.

- **Thread Safety**: The implementation is thread-safe to guarantee correct behavior in multi-threaded environments.

- **Expensive Task Simulation**: Includes a method `expensiveTask()` to simulate an expensive operation, showcasing real-world usage scenarios.

- **Error Handling**: Proper error handling is implemented to handle invalid arguments and other exceptional situations.

## Requirements

- This project requires C++20 to compile and run successfully.

## Compilers

This project is tested and compatible with the following compilers:

- Mingw g++

- Microsoft Visual C++ (MSVC)

## License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.

Feel free to use this content directly in your README.md file on GitHub.

Author: Bardi (Masoud) Parsi

Contact: farsi.masoud@gmail.com

## Usage

To use the Singleton pattern in your project, follow these steps:

1. Include the `SingleTon.h` header file in your project.

2. Use the `getInstance()` method to obtain the Singleton instance.

3. Call the desired methods or perform operations on the Singleton object.

```cpp

#include "SingleTon.h"

int main() {

    // Obtain the Singleton instance

    SingleTon* singleton = SingleTon::getInstance();

    // Use the Singleton instance

    singleton->expensiveTask(42);

    return 0;

}