Method NextCompletionQueue

euler/client/completion_queue_pool.h:41–45

  void operator=(CompletionQueuePool const&) = delete;

  grpc::CompletionQueue *NextCompletionQueue() {
    std::lock_guard<std::mutex> lock(mu_);
    return threads_[next_round_robin_assignment_++ %
                    threads_.size()].completion_queue();
  }

 private:
  explicit CompletionQueuePool(size_t thread_count)