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git.ipfire.org Git - thirdparty/xfsprogs-dev.git/blob - include/radix-tree.h
2 * Copyright (C) 2001 Momchil Velikov
3 * Portions Copyright (C) 2001 Christoph Hellwig
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; either version 2, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 #ifndef __XFS_SUPPORT_RADIX_TREE_H__
20 #define __XFS_SUPPORT_RADIX_TREE_H__
22 #define RADIX_TREE_TAGS
24 struct radix_tree_root
{
26 struct radix_tree_node
*rnode
;
29 #define RADIX_TREE_INIT(mask) { \
34 #define RADIX_TREE(name, mask) \
35 struct radix_tree_root name = RADIX_TREE_INIT(mask)
37 #define INIT_RADIX_TREE(root, mask) \
40 (root)->rnode = NULL; \
43 #ifdef RADIX_TREE_TAGS
44 #define RADIX_TREE_MAX_TAGS 2
47 int radix_tree_insert(struct radix_tree_root
*, unsigned long, void *);
48 void *radix_tree_lookup(struct radix_tree_root
*, unsigned long);
49 void **radix_tree_lookup_slot(struct radix_tree_root
*, unsigned long);
50 void *radix_tree_lookup_first(struct radix_tree_root
*, unsigned long *);
51 void *radix_tree_delete(struct radix_tree_root
*, unsigned long);
53 radix_tree_gang_lookup(struct radix_tree_root
*root
, void **results
,
54 unsigned long first_index
, unsigned int max_items
);
56 radix_tree_gang_lookup_ex(struct radix_tree_root
*root
, void **results
,
57 unsigned long first_index
, unsigned long last_index
,
58 unsigned int max_items
);
60 void radix_tree_init(void);
62 #ifdef RADIX_TREE_TAGS
63 void *radix_tree_tag_set(struct radix_tree_root
*root
,
64 unsigned long index
, unsigned int tag
);
65 void *radix_tree_tag_clear(struct radix_tree_root
*root
,
66 unsigned long index
, unsigned int tag
);
67 int radix_tree_tag_get(struct radix_tree_root
*root
,
68 unsigned long index
, unsigned int tag
);
70 radix_tree_gang_lookup_tag(struct radix_tree_root
*root
, void **results
,
71 unsigned long first_index
, unsigned int max_items
,
73 int radix_tree_tagged(struct radix_tree_root
*root
, unsigned int tag
);
76 #endif /* __XFS_SUPPORT_RADIX_TREE_H__ */