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