fs/xfs/xfs_mru_cache.h

   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__ */