1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_MODHASH_IMPL_H
#define _SYS_MODHASH_IMPL_H
/*
* Internal details for the kernel's generic hash implementation.
*/
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _KERNEL
#include <sys/ksynch.h>
#include <sys/modhash.h>
struct mod_hash_entry {
mod_hash_key_t mhe_key; /* stored hash key */
mod_hash_val_t mhe_val; /* stored hash value */
struct mod_hash_entry *mhe_next; /* next item in chain */
};
struct mod_hash_stat {
ulong_t mhs_hit; /* tried a 'find' and it succeeded */
ulong_t mhs_miss; /* tried a 'find' but it failed */
ulong_t mhs_coll; /* occur when insert fails because of dup's */
ulong_t mhs_nelems; /* total number of stored key/value pairs */
ulong_t mhs_nomem; /* number of times kmem_alloc failed */
};
struct mod_hash {
krwlock_t mh_contents; /* lock protecting contents */
char *mh_name; /* hash name */
int mh_sleep; /* kmem_alloc flag */
size_t mh_nchains; /* # of elements in mh_entries */
/* key and val destructor */
void (*mh_kdtor)(mod_hash_key_t);
void (*mh_vdtor)(mod_hash_val_t);
/* key comparator */
int (*mh_keycmp)(mod_hash_key_t, mod_hash_key_t);
/* hash algorithm, and algorithm-private data */
uint_t (*mh_hashalg)(void *, mod_hash_key_t);
void *mh_hashalg_data;
struct mod_hash *mh_next; /* next hash in list */
struct mod_hash_stat mh_stat;
struct mod_hash_entry *mh_entries[1];
};
/*
* MH_SIZE()
* Compute the size of a mod_hash_t, in bytes, given the number of
* elements it contains.
*/
#define MH_SIZE(n) \
(sizeof (mod_hash_t) + ((n) - 1) * (sizeof (struct mod_hash_entry *)))
/*
* Module initialization; called once.
*/
void mod_hash_init(void);
/*
* Internal routines. Use directly with care.
*/
uint_t i_mod_hash(mod_hash_t *, mod_hash_key_t);
int i_mod_hash_insert_nosync(mod_hash_t *, mod_hash_key_t, mod_hash_val_t,
mod_hash_hndl_t);
int i_mod_hash_remove_nosync(mod_hash_t *, mod_hash_key_t, mod_hash_val_t *);
int i_mod_hash_find_nosync(mod_hash_t *, mod_hash_key_t, mod_hash_val_t *);
void i_mod_hash_walk_nosync(mod_hash_t *, uint_t (*)(mod_hash_key_t,
mod_hash_val_t *, void *), void *);
void i_mod_hash_clear_nosync(mod_hash_t *hash);
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_MODHASH_IMPL_H */
|