Method Pop

cpp/src/arrow/util/async_util.cc:110–114

  void Push(std::unique_ptr<Task> task) override { tasks_.push_back(std::move(task)); }

  std::unique_ptr<Task> Pop() override {
    std::unique_ptr<Task> task = std::move(tasks_.front());
    tasks_.pop_front();
    return task;
  }

  const Task& Peek() override { return *tasks_.front(); }