| 50 | } |
| 51 | |
| 52 | BufferDesc* get(PageNumber page) |
| 53 | { |
| 54 | Item* item = m_map.lookup(page); |
| 55 | |
| 56 | if (item) |
| 57 | { |
| 58 | if (item->m_bdb->bdb_page == page) |
| 59 | { |
| 60 | // Move item into MRU position |
| 61 | if (m_list != item) |
| 62 | { |
| 63 | listRemove(item); |
| 64 | listInsert(item); |
| 65 | } |
| 66 | return item->m_bdb; |
| 67 | } |
| 68 | |
| 69 | // bdb was reassigned |
| 70 | remove(page); |
| 71 | } |
| 72 | |
| 73 | return nullptr; |
| 74 | } |
| 75 | |
| 76 | void put(BufferDesc* bdb) |
| 77 | { |