thread safe c++11 singleton

threadSafeSingleton.cpp

#include <iostream>

using namespace std;

class CSingleton final
{
public:
    static CSingleton* GetInstance();
    void set_x(const int& x_){x = x_;};
    int get_x(){return x;};
 
private:
    int x;

    CSingleton() = default;
    ~CSingleton() = default;
 
    CSingleton(const CSingleton&) = delete;
    CSingleton& operator=(const CSingleton&) = delete;
    CSingleton(CSingleton&&) = delete;
    CSingleton& operator=(CSingleton&&) = delete;
};

 
CSingleton* CSingleton::GetInstance()
{
    static CSingleton instance;
    return &instance;
}


int main()
{
    cout<<"Hello World\n";
    CSingleton::GetInstance()->set_x(5);
    std::cout << CSingleton::GetInstance()->get_x() << std::endl;

    return 0;
}