1/* 2 * Copyright (c) 2006-2007 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18#ifndef __XFS_MRU_CACHE_H__ 19#define __XFS_MRU_CACHE_H__ 20 21struct xfs_mru_cache; 22 23struct xfs_mru_cache_elem { 24 struct list_head list_node; 25 unsigned long key; 26}; 27 28/* Function pointer type for callback to free a client's data pointer. */ 29typedef void (*xfs_mru_cache_free_func_t)(struct xfs_mru_cache_elem *elem); 30 31int xfs_mru_cache_init(void); 32void xfs_mru_cache_uninit(void); 33int xfs_mru_cache_create(struct xfs_mru_cache **mrup, unsigned int lifetime_ms, 34 unsigned int grp_count, 35 xfs_mru_cache_free_func_t free_func); 36void xfs_mru_cache_destroy(struct xfs_mru_cache *mru); 37int xfs_mru_cache_insert(struct xfs_mru_cache *mru, unsigned long key, 38 struct xfs_mru_cache_elem *elem); 39struct xfs_mru_cache_elem * 40xfs_mru_cache_remove(struct xfs_mru_cache *mru, unsigned long key); 41void xfs_mru_cache_delete(struct xfs_mru_cache *mru, unsigned long key); 42struct xfs_mru_cache_elem * 43xfs_mru_cache_lookup(struct xfs_mru_cache *mru, unsigned long key); 44void xfs_mru_cache_done(struct xfs_mru_cache *mru); 45 46#endif /* __XFS_MRU_CACHE_H__ */ 47