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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #pragma ident "%Z%%M% %I% %E% SMI"
27
28 #include <stdio.h>
29 #include <string.h>
30 #include <stdlib.h>
31
32 #include "cache.h"
33
34 nsc_keephot_t *
maken(int n)35 maken(int n)
36 {
37 nsc_keephot_t *ret;
38
39 ++n;
40 ret = (nsc_keephot_t *)calloc(n, sizeof (nsc_keephot_t));
41 if (ret == NULL)
42 return (NULL);
43 ret[0].num = n - 1;
44 return (ret);
45 }
46
47 void *
insertn(nsc_keephot_t * table,uint_t n,void * data)48 insertn(nsc_keephot_t *table, uint_t n, void *data)
49 {
50 void *olddata;
51 int size, guess, base, last;
52
53 if (n < 1 || table[1].num > n) {
54 return (data);
55 }
56
57 size = table[0].num;
58 if (table[size].num < n) /* biggest so far */
59 guess = size;
60 else {
61 base = 1;
62 last = size;
63 while (last >= base) {
64 guess = (last+base)/2;
65 if (table[guess].num == n)
66 goto doit;
67 if (table[guess].num > n)
68 last = guess - 1;
69 else
70 base = guess + 1;
71 }
72 guess = last;
73 }
74
75 doit:
76 olddata = table[1].ptr;
77 (void) memmove(table + 1, table + 2,
78 sizeof (nsc_keephot_t) * (guess-1));
79 table[guess].ptr = data;
80 table[guess].num = n;
81 return (olddata);
82 }
83