1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (c) 2006-2007 Silicon Graphics, Inc. 4*4882a593Smuzhiyun * All Rights Reserved. 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun #ifndef __XFS_MRU_CACHE_H__ 7*4882a593Smuzhiyun #define __XFS_MRU_CACHE_H__ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun struct xfs_mru_cache; 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun struct xfs_mru_cache_elem { 12*4882a593Smuzhiyun struct list_head list_node; 13*4882a593Smuzhiyun unsigned long key; 14*4882a593Smuzhiyun }; 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun /* Function pointer type for callback to free a client's data pointer. */ 17*4882a593Smuzhiyun typedef void (*xfs_mru_cache_free_func_t)(void *, struct xfs_mru_cache_elem *); 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun int xfs_mru_cache_init(void); 20*4882a593Smuzhiyun void xfs_mru_cache_uninit(void); 21*4882a593Smuzhiyun int xfs_mru_cache_create(struct xfs_mru_cache **mrup, void *data, 22*4882a593Smuzhiyun unsigned int lifetime_ms, unsigned int grp_count, 23*4882a593Smuzhiyun xfs_mru_cache_free_func_t free_func); 24*4882a593Smuzhiyun void xfs_mru_cache_destroy(struct xfs_mru_cache *mru); 25*4882a593Smuzhiyun int xfs_mru_cache_insert(struct xfs_mru_cache *mru, unsigned long key, 26*4882a593Smuzhiyun struct xfs_mru_cache_elem *elem); 27*4882a593Smuzhiyun struct xfs_mru_cache_elem * 28*4882a593Smuzhiyun xfs_mru_cache_remove(struct xfs_mru_cache *mru, unsigned long key); 29*4882a593Smuzhiyun void xfs_mru_cache_delete(struct xfs_mru_cache *mru, unsigned long key); 30*4882a593Smuzhiyun struct xfs_mru_cache_elem * 31*4882a593Smuzhiyun xfs_mru_cache_lookup(struct xfs_mru_cache *mru, unsigned long key); 32*4882a593Smuzhiyun void xfs_mru_cache_done(struct xfs_mru_cache *mru); 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun #endif /* __XFS_MRU_CACHE_H__ */ 35