| 223 | } |
| 224 | |
| 225 | Status BufferedTupleStream::PrepareForWrite(bool* got_reservation) { |
| 226 | // This must be the first iterator created. |
| 227 | DCHECK(pages_.empty()); |
| 228 | DCHECK(!read_it_.attach_on_read_); |
| 229 | DCHECK(!has_write_iterator()); |
| 230 | DCHECK(!has_read_iterator()); |
| 231 | CHECK_CONSISTENCY_FULL(read_it_); |
| 232 | |
| 233 | *got_reservation = buffer_pool_client_->IncreaseReservationToFit(default_page_len_); |
| 234 | if (!*got_reservation) return Status::OK(); |
| 235 | has_write_iterator_ = true; |
| 236 | // Save reservation for the write iterators. |
| 237 | buffer_pool_client_->SaveReservation(&write_page_reservation_, default_page_len_); |
| 238 | CHECK_CONSISTENCY_FULL(read_it_); |
| 239 | return Status::OK(); |
| 240 | } |
| 241 | |
| 242 | Status BufferedTupleStream::PrepareForReadWrite( |
| 243 | bool attach_on_read, bool* got_reservation) { |