| Marcoen Hirschberg | b0fee17 | 2005-12-06 13:27:15 +0000 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * __________ __ ___. |
| 3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| 4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| 5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| 6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| 7 | * \/ \/ \/ \/ \/ |
| 8 | * |
| 9 | * Copyright (C) 2003 Tat Tang |
| 10 | * |
| Daniel Stenberg | 2acc0ac | 2008-06-28 18:10:04 +0000 | [diff] [blame^] | 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License |
| 13 | * as published by the Free Software Foundation; either version 2 |
| 14 | * of the License, or (at your option) any later version. |
| Marcoen Hirschberg | b0fee17 | 2005-12-06 13:27:15 +0000 | [diff] [blame] | 15 | * |
| 16 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| 17 | * KIND, either express or implied. |
| 18 | * |
| 19 | ****************************************************************************/ |
| 20 | |
| 21 | #ifndef LRU_H |
| 22 | #define LRU_H |
| 23 | |
| 24 | /******************************************************************************* |
| 25 | * LRU manager |
| 26 | ******************************************************************************/ |
| 27 | struct lru |
| 28 | { |
| 29 | short _head; |
| 30 | short _tail; |
| 31 | short _size; |
| 32 | short _slot_size; |
| 33 | void *_base; |
| 34 | }; |
| 35 | |
| 36 | #define LRU_SLOT_OVERHEAD (2 * sizeof(short)) |
| 37 | |
| 38 | /* Create LRU list with specified size from buf. */ |
| 39 | void lru_create(struct lru* pl, void *buf, short size, short data_size); |
| 40 | /* Touch an entry. Moves handle to back of LRU list */ |
| 41 | void lru_touch(struct lru* pl, short handle); |
| 42 | /* Data */ |
| 43 | void *lru_data(struct lru* pl, short handle); |
| 44 | /* Traverse lru-wise */ |
| 45 | void lru_traverse(struct lru* pl, void (*callback)(void* data)); |
| 46 | |
| 47 | #endif /* LRU_H */ |
| 48 | |