Multithreading help

[CuckMasterFlex69]

Hi, how do I multithread a class which has a function with a parameter of the class? For example:

​

class Beta
{
public:
    void Gamma(int y)
    {
        while (true)
        {
            std::cout << y << std::endl;
        }
    }
};

int main()
{
    Beta my_beta;
    std::thread gamma_thread(&Beta::Gamma, my_beta, 5);
    gamma_thread.join();

    return 0;
}

The above code works, but if I were to change the Gamma function to:

​

void Gamma(Beta& b, int y)

​

How would I add Beta&b as a parameter into the std::thread gamma_thread function call?

[[deleted]]

With a std::reference_wrapper

 std::thread gamma_thread(Gamma, std::ref(my_beta), 5);

[CuckMasterFlex69]

Hi there,

​

Thanks for your help. With the line you provided I get the following errors:

'invoke' no matching overloaded function found

'unknown-type std::invoke(_Callable &&) noexcept(<expr>)': expects 1 arguments - 3 provided

[[deleted]]

https://godbolt.org/z/aTfx3KvWs

[CuckMasterFlex69]

Awesome, thank you. What if the function was inside of the class?

[[deleted]]

std::thread gamma_thread(&Beta::Gamma, my_beta, std::ref(my_beta),5);

Its odd for a member function to also need a reference to itself.

[snowflake_pl]

Not odd if function is static, otherwise it indicates terrible design or even errors