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