Method CurrentEmpty

cpp/src/arrow/acero/asof_join_node.cc:557–559

true when the queue is empty and, when memo may have future entries (the case of a positive tolerance), when the memo is empty. used when checking whether RHS is up to date with LHS. NOTE: The emptiness must be decided by a single call to Empty() in caller, due to the potential race with Push(), see GH-41614.

  // NOTE: The emptiness must be decided by a single call to Empty() in caller, due to the
  // potential race with Push(), see GH-41614.
  bool CurrentEmpty(bool empty) const {
    return memo_.no_future_ ? empty : (memo_.times_.empty() && empty);
  }

  // in case memo may not have future entries (the case of a non-positive tolerance),
  // returns the latest time (which is current); otherwise, returns the current time.