1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <assert.h>
30
31 #include <dt_inttab.h>
32 #include <dt_impl.h>
33
34 dt_inttab_t *
dt_inttab_create(dtrace_hdl_t * dtp)35 dt_inttab_create(dtrace_hdl_t *dtp)
36 {
37 uint_t len = _dtrace_intbuckets;
38 dt_inttab_t *ip;
39
40 assert((len & (len - 1)) == 0);
41
42 if ((ip = dt_zalloc(dtp, sizeof (dt_inttab_t))) == NULL ||
43 (ip->int_hash = dt_zalloc(dtp, sizeof (void *) * len)) == NULL) {
44 dt_free(dtp, ip);
45 return (NULL);
46 }
47
48 ip->int_hdl = dtp;
49 ip->int_hashlen = len;
50
51 return (ip);
52 }
53
54 void
dt_inttab_destroy(dt_inttab_t * ip)55 dt_inttab_destroy(dt_inttab_t *ip)
56 {
57 dt_inthash_t *hp, *np;
58
59 for (hp = ip->int_head; hp != NULL; hp = np) {
60 np = hp->inh_next;
61 dt_free(ip->int_hdl, hp);
62 }
63
64 dt_free(ip->int_hdl, ip->int_hash);
65 dt_free(ip->int_hdl, ip);
66 }
67
68 int
dt_inttab_insert(dt_inttab_t * ip,uint64_t value,uint_t flags)69 dt_inttab_insert(dt_inttab_t *ip, uint64_t value, uint_t flags)
70 {
71 uint_t h = value & (ip->int_hashlen - 1);
72 dt_inthash_t *hp;
73
74 if (flags & DT_INT_SHARED) {
75 for (hp = ip->int_hash[h]; hp != NULL; hp = hp->inh_hash) {
76 if (hp->inh_value == value && hp->inh_flags == flags)
77 return (hp->inh_index);
78 }
79 }
80
81 if ((hp = dt_alloc(ip->int_hdl, sizeof (dt_inthash_t))) == NULL)
82 return (-1);
83
84 hp->inh_hash = ip->int_hash[h];
85 hp->inh_next = NULL;
86 hp->inh_value = value;
87 hp->inh_index = ip->int_index++;
88 hp->inh_flags = flags;
89
90 ip->int_hash[h] = hp;
91 ip->int_nelems++;
92
93 if (ip->int_head == NULL)
94 ip->int_head = hp;
95 else
96 ip->int_tail->inh_next = hp;
97
98 ip->int_tail = hp;
99 return (hp->inh_index);
100 }
101
102 uint_t
dt_inttab_size(const dt_inttab_t * ip)103 dt_inttab_size(const dt_inttab_t *ip)
104 {
105 return (ip->int_nelems);
106 }
107
108 void
dt_inttab_write(const dt_inttab_t * ip,uint64_t * dst)109 dt_inttab_write(const dt_inttab_t *ip, uint64_t *dst)
110 {
111 const dt_inthash_t *hp;
112
113 for (hp = ip->int_head; hp != NULL; hp = hp->inh_next)
114 *dst++ = hp->inh_value;
115 }
116