Method TryConsumeFromMemTracker

be/src/runtime/bufferpool/reservation-tracker.cc:239–254

}

bool ReservationTracker::TryConsumeFromMemTracker(
    int64_t reservation_increase, MemLimit mem_limit_mode) {
  DCHECK_GE(reservation_increase, 0);
  if (mem_tracker_ == nullptr) return true;
  if (GetParentMemTracker() == nullptr) {
    // At the topmost link, which may be a MemTracker with a limit, we need to use
    // TryConsume() to check the limit.
    return mem_tracker_->TryConsume(reservation_increase, mem_limit_mode);
  } else {
    // For lower links, there shouldn't be a limit to enforce, so we just need to
    // update the consumption of the linked MemTracker since the reservation is
    // already reflected in its parent.
    mem_tracker_->ConsumeLocal(reservation_increase, GetParentMemTracker());
    return true;
  }
}

void ReservationTracker::ReleaseToMemTracker(int64_t reservation_decrease) {
  DCHECK_GE(reservation_decrease, 0);