FreeBSD/Linux Kernel Cross Reference
sys/sys/radixtree.h
1 /* $NetBSD: radixtree.h,v 1.7 2020/01/28 16:33:34 ad Exp $ */
2
3 /*-
4 * Copyright (c)2011 YAMAMOTO Takashi,
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #if !defined(_SYS_RADIXTREE_H_)
30 #define _SYS_RADIXTREE_H_
31
32 struct radix_tree {
33 void *t_root;
34 unsigned int t_height;
35 };
36
37 #if defined(_KERNEL) || defined(_STANDALONE)
38 #include <sys/types.h>
39 #else /* defined(_KERNEL) || defined(_STANDALONE) */
40 #include <stdbool.h>
41 #include <stdint.h>
42 #endif /* defined(_KERNEL) || defined(_STANDALONE) */
43
44 /*
45 * subsystem
46 */
47
48 #if defined(_KERNEL)
49 void radix_tree_init(void);
50 void radix_tree_await_memory(void);
51 #endif /* defined(_KERNEL) */
52
53 /*
54 * tree
55 */
56
57 void radix_tree_init_tree(struct radix_tree *);
58 void radix_tree_fini_tree(struct radix_tree *);
59 bool radix_tree_empty_tree_p(struct radix_tree *);
60
61 /*
62 * node
63 */
64
65 int radix_tree_insert_node(struct radix_tree *, uint64_t, void *);
66 void *radix_tree_replace_node(struct radix_tree *, uint64_t, void *);
67 void *radix_tree_remove_node(struct radix_tree *, uint64_t);
68 void *radix_tree_lookup_node(struct radix_tree *, uint64_t);
69 unsigned int radix_tree_gang_lookup_node(struct radix_tree *, uint64_t,
70 void **, unsigned int, bool);
71 unsigned int radix_tree_gang_lookup_node_reverse(struct radix_tree *, uint64_t,
72 void **, unsigned int, bool);
73
74 /*
75 * tag
76 */
77
78 typedef unsigned int radix_tree_tagmask_t;
79 #define RADIX_TREE_TAG_ID_MAX 2
80 radix_tree_tagmask_t radix_tree_get_tag(struct radix_tree *, uint64_t,
81 radix_tree_tagmask_t);
82 void radix_tree_set_tag(struct radix_tree *, uint64_t, radix_tree_tagmask_t);
83 void radix_tree_clear_tag(struct radix_tree *, uint64_t, radix_tree_tagmask_t);
84 unsigned int radix_tree_gang_lookup_tagged_node(struct radix_tree *, uint64_t,
85 void **, unsigned int, bool, radix_tree_tagmask_t);
86 unsigned int radix_tree_gang_lookup_tagged_node_reverse(struct radix_tree *,
87 uint64_t, void **, unsigned int, bool, radix_tree_tagmask_t);
88 bool radix_tree_empty_tagged_tree_p(struct radix_tree *, radix_tree_tagmask_t);
89
90 #endif /* !defined(_SYS_RADIXTREE_H_) */
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