Method try_dequeue

examples/multithread_midiout.cpp:40–50

  }

  bool try_dequeue(T& t)
  {
    std::scoped_lock lock{m_mutex};
    if (!m_data.empty())
    {
      t = std::move(m_data.front());
      m_data.pop_front();
      return true;
    }
    return false;
  }

private:
  std::mutex m_mutex;