Gain insights into using Modern C++ for embedded programming. Learn about safety-critical systems, optimize performance, manage limited resources, and handle parallel execution effectively.

waleed1.tar.gz

C++11

C++ 17

Embedded Programming with Modern C++  is highly valuable for each professional programmer.

In the past, embedded and system programming have had their pitfalls, but modern C++ has been designed to be a better language for this type of development, addressing the previous pitfalls/requirements explicitly. What are these requirements? Embedded systems deal with safety-critical systems, meaning they must guarantee high performance combined with limited resources, while also working in parallel.

The scope of this course goes beyond just embedded programming. Developers who write servers, games, or trading systems may especially benefit from this course because they also have to deal with safety-critical systems, high performance, reduced resources, and parallel execution in their jobs.

To get the most out of the course, you only need a basic understanding of C++. Building off this understanding, this course goes over all the essentials of embedded programming with Modern C++.

Let's get started!

Embedded Programming with Modern C++

//singletonMultithreading.cpp

#include <iostream>
#include <mutex>

class MySingleton{

  private:
    static std::once_flag initInstanceFlag;
    static MySingleton* instance;
    MySingleton()= default;
    ~MySingleton()= default;

  public:
    MySingleton(const MySingleton&)= delete;
    MySingleton& operator=(const MySingleton&)= delete;

    static MySingleton* getInstance(){
      std::call_once(initInstanceFlag, MySingleton::initSingleton);
      return instance;
    }

    static void initSingleton(){
      instance= new MySingleton();
    }
};

MySingleton* MySingleton::instance= nullptr;
std::once_flag MySingleton::initInstanceFlag;


int main(){

  std::cout << std::endl;

  std::cout << "MySingleton::getInstance(): "<< MySingleton::getInstance() << std::endl;
  std::cout << "MySingleton::getInstance(): "<< MySingleton::getInstance() << std::endl;

  std::cout << std::endl;

}


## Explanation

* Let's first review the static `std::once_flag` which is declared in line 9 and initialized in line 29. 

* The static method `getInstance` (lines 18 - 21) uses the flag `initInstanceFlag` to ensure that the static method `initSingleton` (line 23 - 25) is executed exactly once. The singleton is created in the body of the method.
 
> **`default` and `delete`**
>
> You can request special methods from the compiler by using the keyword `default`. These methods are special because they are created by the compiler. If we annotate a method with `delete`, the compiler-generated methods will not be available and, therefore, cannot be called. If you try to use these methods, you will get a compile-time error. 

> Here are the more details for the keywords [default and delete](https://isocpp.org/wiki/faq/cpp11-language-classes).

* The `MySingleton::getIstance()` method displays the address of the singleton.

In this lesson, we will discuss the solution to the exercise in of the previous lesson.

Introduction

Safety-Critical Systems

High Performance

Reduced Resources

Several Tasks Simultaneously

Conclusion

- Solution