Method operator()

tests/concurrent_queue_test/concurrent_queue_test.cpp:118–125

        : total { total }, data { data }, id { id } { }

    void operator()()
    {
        log().nospace() << id << " sleep " << toMilliseconds(data.sleepingTime) << " ms...";
        std::this_thread::sleep_for(data.sleepingTime);

        const auto updatedTotal = (total += data.summand);
        log().nospace() << id << " +" << data.summand << " => " << updatedTotal;
    }

private:
    Total &total;