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 (c) 1999 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 #include <mdb/mdb_addrvec.h>
28 #include <mdb/mdb_debug.h>
29 #include <mdb/mdb_modapi.h>
30
31 #include <strings.h>
32
33 #define AD_INIT 16 /* initial size of addrvec array */
34 #define AD_GROW 2 /* array growth multiplier */
35
36 void
mdb_addrvec_create(mdb_addrvec_t * adp)37 mdb_addrvec_create(mdb_addrvec_t *adp)
38 {
39 bzero(adp, sizeof (mdb_addrvec_t));
40 }
41
42 void
mdb_addrvec_destroy(mdb_addrvec_t * adp)43 mdb_addrvec_destroy(mdb_addrvec_t *adp)
44 {
45 mdb_free(adp->ad_data, sizeof (uintptr_t) * adp->ad_size);
46 bzero(adp, sizeof (mdb_addrvec_t));
47 }
48
49 void
mdb_addrvec_unshift(mdb_addrvec_t * adp,uintptr_t value)50 mdb_addrvec_unshift(mdb_addrvec_t *adp, uintptr_t value)
51 {
52 if (adp->ad_nelems >= adp->ad_size) {
53 size_t size = adp->ad_size ? adp->ad_size * AD_GROW : AD_INIT;
54 void *data = mdb_alloc(sizeof (uintptr_t) * size, UM_SLEEP);
55
56 bcopy(adp->ad_data, data, sizeof (uintptr_t) * adp->ad_size);
57 mdb_free(adp->ad_data, sizeof (uintptr_t) * adp->ad_size);
58
59 adp->ad_data = data;
60 adp->ad_size = size;
61 }
62
63 adp->ad_data[adp->ad_nelems++] = value;
64 }
65
66 uintptr_t
mdb_addrvec_shift(mdb_addrvec_t * adp)67 mdb_addrvec_shift(mdb_addrvec_t *adp)
68 {
69 if (adp->ad_ndx < adp->ad_nelems)
70 return (adp->ad_data[adp->ad_ndx++]);
71
72 return ((uintptr_t)-1L);
73 }
74
75 size_t
mdb_addrvec_length(mdb_addrvec_t * adp)76 mdb_addrvec_length(mdb_addrvec_t *adp)
77 {
78 if (adp != NULL) {
79 ASSERT(adp->ad_nelems >= adp->ad_ndx);
80 return (adp->ad_nelems - adp->ad_ndx);
81 }
82
83 return (0); /* convenience for callers */
84 }
85