| 705 | } |
| 706 | |
| 707 | func (db *DB) close() error { |
| 708 | if !db.opened { |
| 709 | return nil |
| 710 | } |
| 711 | |
| 712 | db.opened = false |
| 713 | |
| 714 | db.freelist = nil |
| 715 | |
| 716 | // Clear ops. |
| 717 | db.ops.writeAt = nil |
| 718 | |
| 719 | var errs []error |
| 720 | // Close the mmap. |
| 721 | if err := db.munmap(); err != nil { |
| 722 | errs = append(errs, err) |
| 723 | } |
| 724 | |
| 725 | // Close file handles. |
| 726 | if db.file != nil { |
| 727 | // No need to unlock read-only file. |
| 728 | if !db.readOnly { |
| 729 | // Unlock the file. |
| 730 | if err := funlock(db); err != nil { |
| 731 | errs = append(errs, fmt.Errorf("bolt.Close(): funlock error: %w", err)) |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | // Close the file descriptor. |
| 736 | if err := db.file.Close(); err != nil { |
| 737 | errs = append(errs, fmt.Errorf("db file close: %w", err)) |
| 738 | } |
| 739 | db.file = nil |
| 740 | } |
| 741 | |
| 742 | db.path = "" |
| 743 | |
| 744 | if len(errs) > 0 { |
| 745 | return errs[0] |
| 746 | } |
| 747 | return nil |
| 748 | } |
| 749 | |
| 750 | // Begin starts a new transaction. |
| 751 | // Multiple read-only transactions can be used concurrently but only one |