Doevents() function in c++ linux

Question

I need a function equivalent to Doevents() in c++ on linux. I found the equivalent of this function in c++ but nothing works in linux, they are using Windows.h.

doevents-equivalent-for-c and Doevents() in c++

I need it for this function:

void FTDI_Mgt::waitN_Milliseconds(int _msec)
{
    if (_msec < 1)
    {
        return;
    }
     auto _desired = std::chrono::steady_clock::now() + std::chrono::milliseconds(_msec);

    while (std::chrono::steady_clock::now() < _desired)     
    {
        DoEvents();     
    }
}

I'm stuck, could you help please?