Function Append

cpp/src/arrow/util/task_group.h:54–60

/// a new batch of work then you should create a new task group.
class ARROW_EXPORT TaskGroup : public std::enable_shared_from_this<TaskGroup> {
 public:
  /// Add a Status-returning function to execute.  Execution order is
  /// undefined.  The function may be executed immediately or later.
  template <typename Function>
  void Append(Function&& func) {
    return AppendReal(std::forward<Function>(func));
  }

  /// Wait for execution of all tasks (and subgroups) to be finished,
  /// or for at least one task (or subgroup) to error out.