Class Timer

tutorials/MultipleContextsInParallel/MultipleContextsInParallel.cpp:63–80

    const void* userParam);

struct Timer {
    std::string m_name;
    std::chrono::time_point<std::chrono::steady_clock> m_startpoint;
    Timer(std::string name)
        : m_name(name)
        , m_startpoint(std::chrono::steady_clock::now())
    {
    }

    ~Timer()
    {
        const std::chrono::time_point<std::chrono::steady_clock> now = std::chrono::steady_clock::now();
        const std::chrono::milliseconds elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(now - m_startpoint);
        unsigned long long elapsed_ = elapsed.count();
        printf(">> Task %s [%llums]\n", m_name.c_str(), elapsed_);
        fflush(stdout);
    }
};

int main()
{