2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2013 EMC Corp.
5 * Copyright (c) 2011 Jeffrey Roberson <jeff@freebsd.org>
6 * Copyright (c) 2008 Mayur Shardul <mayur.shardul@gmail.com>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #ifndef _SYS_PCTRIE_H_
34 #define _SYS_PCTRIE_H_
36 #include <sys/_pctrie.h>
40 #define PCTRIE_DEFINE(name, type, field, allocfn, freefn) \
42 CTASSERT(sizeof(((struct type *)0)->field) == sizeof(uint64_t)); \
44 * XXX This assert protects flag bits, it does not enforce natural \
45 * alignment. 32bit architectures do not naturally align 64bit fields. \
47 CTASSERT((__offsetof(struct type, field) & (sizeof(uint32_t) - 1)) == 0); \
49 static __inline struct type * \
50 name##_PCTRIE_VAL2PTR(uint64_t *val) \
55 return (struct type *) \
56 ((uintptr_t)val - __offsetof(struct type, field)); \
59 static __inline uint64_t * \
60 name##_PCTRIE_PTR2VAL(struct type *ptr) \
67 name##_PCTRIE_INSERT(struct pctrie *ptree, struct type *ptr) \
70 return pctrie_insert(ptree, name##_PCTRIE_PTR2VAL(ptr), \
74 static __inline struct type * \
75 name##_PCTRIE_LOOKUP(struct pctrie *ptree, uint64_t key) \
78 return name##_PCTRIE_VAL2PTR(pctrie_lookup(ptree, key)); \
81 static __inline __unused struct type * \
82 name##_PCTRIE_LOOKUP_LE(struct pctrie *ptree, uint64_t key) \
85 return name##_PCTRIE_VAL2PTR(pctrie_lookup_le(ptree, key)); \
88 static __inline __unused struct type * \
89 name##_PCTRIE_LOOKUP_GE(struct pctrie *ptree, uint64_t key) \
92 return name##_PCTRIE_VAL2PTR(pctrie_lookup_ge(ptree, key)); \
95 static __inline __unused void \
96 name##_PCTRIE_RECLAIM(struct pctrie *ptree) \
99 pctrie_reclaim_allnodes(ptree, freefn); \
102 static __inline void \
103 name##_PCTRIE_REMOVE(struct pctrie *ptree, uint64_t key) \
106 pctrie_remove(ptree, key, freefn); \
109 typedef void *(*pctrie_alloc_t)(struct pctrie *ptree);
110 typedef void (*pctrie_free_t)(struct pctrie *ptree, void *node);
112 int pctrie_insert(struct pctrie *ptree, uint64_t *val,
113 pctrie_alloc_t allocfn);
114 uint64_t *pctrie_lookup(struct pctrie *ptree, uint64_t key);
115 uint64_t *pctrie_lookup_ge(struct pctrie *ptree, uint64_t key);
116 uint64_t *pctrie_lookup_le(struct pctrie *ptree, uint64_t key);
117 void pctrie_reclaim_allnodes(struct pctrie *ptree,
118 pctrie_free_t freefn);
119 void pctrie_remove(struct pctrie *ptree, uint64_t key,
120 pctrie_free_t freefn);
121 size_t pctrie_node_size(void);
122 int pctrie_zone_init(void *mem, int size, int flags);
125 pctrie_init(struct pctrie *ptree)
131 static __inline boolean_t
132 pctrie_is_empty(struct pctrie *ptree)
135 return (ptree->pt_root == 0);
139 * These widths should allow the pointers to a node's children to fit within
140 * a single cache line. The extra levels from a narrow width should not be
141 * a problem thanks to path compression.
144 #define PCTRIE_WIDTH 4
146 #define PCTRIE_WIDTH 3
149 #define PCTRIE_COUNT (1 << PCTRIE_WIDTH)
152 #endif /* !_SYS_PCTRIE_H_ */