Method lock

src/threaded_queue.hh:32–32

  MultiQueueLock(Queue... lockable) : tuple_{lockable...} { lock(); }
  ~MultiQueueLock() { unlock(); }
  void lock() { lock_impl(typename std::index_sequence_for<Queue...>{}); }
  void unlock() { unlock_impl(typename std::index_sequence_for<Queue...>{}); }

private: