1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright (c) 2000-2001 by Sun Microsystems, Inc.
24*0Sstevel@tonic-gate * All rights reserved.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include <string.h>
30*0Sstevel@tonic-gate #include <stdlib.h>
31*0Sstevel@tonic-gate
32*0Sstevel@tonic-gate #include "rdutil.h"
33*0Sstevel@tonic-gate #include "rdtable.h"
34*0Sstevel@tonic-gate
35*0Sstevel@tonic-gate static lwpid_t *lwpid_tbl[LWPID_TBL_SZ];
36*0Sstevel@tonic-gate
37*0Sstevel@tonic-gate void
lwpid_init()38*0Sstevel@tonic-gate lwpid_init()
39*0Sstevel@tonic-gate {
40*0Sstevel@tonic-gate (void) memset(&lwpid_tbl, 0, sizeof (lwpid_t *) * LWPID_TBL_SZ);
41*0Sstevel@tonic-gate }
42*0Sstevel@tonic-gate
43*0Sstevel@tonic-gate void
lwpid_add(lwp_info_t * lwp,pid_t pid,id_t lwpid)44*0Sstevel@tonic-gate lwpid_add(lwp_info_t *lwp, pid_t pid, id_t lwpid)
45*0Sstevel@tonic-gate {
46*0Sstevel@tonic-gate lwpid_t *elm = Zalloc(sizeof (lwpid_t));
47*0Sstevel@tonic-gate int hash = pid % LWPID_TBL_SZ;
48*0Sstevel@tonic-gate
49*0Sstevel@tonic-gate elm->l_pid = pid;
50*0Sstevel@tonic-gate elm->l_lwpid = lwpid;
51*0Sstevel@tonic-gate elm->l_lwp = lwp;
52*0Sstevel@tonic-gate elm->l_next = lwpid_tbl[hash]; /* add in front of chain */
53*0Sstevel@tonic-gate lwpid_tbl[hash] = elm;
54*0Sstevel@tonic-gate }
55*0Sstevel@tonic-gate
56*0Sstevel@tonic-gate void
lwpid_del(pid_t pid,id_t lwpid)57*0Sstevel@tonic-gate lwpid_del(pid_t pid, id_t lwpid)
58*0Sstevel@tonic-gate {
59*0Sstevel@tonic-gate lwpid_t *elm, *elm_prev;
60*0Sstevel@tonic-gate int hash = pid % LWPID_TBL_SZ;
61*0Sstevel@tonic-gate
62*0Sstevel@tonic-gate elm = lwpid_tbl[hash];
63*0Sstevel@tonic-gate elm_prev = NULL;
64*0Sstevel@tonic-gate
65*0Sstevel@tonic-gate while (elm) {
66*0Sstevel@tonic-gate if ((elm->l_pid == pid) && (elm->l_lwpid == lwpid)) {
67*0Sstevel@tonic-gate if (!elm_prev) /* first chain element */
68*0Sstevel@tonic-gate lwpid_tbl[hash] = elm->l_next;
69*0Sstevel@tonic-gate else
70*0Sstevel@tonic-gate elm_prev->l_next = elm->l_next;
71*0Sstevel@tonic-gate free(elm);
72*0Sstevel@tonic-gate break;
73*0Sstevel@tonic-gate } else {
74*0Sstevel@tonic-gate elm_prev = elm;
75*0Sstevel@tonic-gate elm = elm->l_next;
76*0Sstevel@tonic-gate }
77*0Sstevel@tonic-gate }
78*0Sstevel@tonic-gate }
79*0Sstevel@tonic-gate
80*0Sstevel@tonic-gate static lwpid_t *
lwpid_getptr(pid_t pid,id_t lwpid)81*0Sstevel@tonic-gate lwpid_getptr(pid_t pid, id_t lwpid)
82*0Sstevel@tonic-gate {
83*0Sstevel@tonic-gate lwpid_t *elm = lwpid_tbl[pid % LWPID_TBL_SZ];
84*0Sstevel@tonic-gate while (elm) {
85*0Sstevel@tonic-gate if ((elm->l_pid == pid) && (elm->l_lwpid == lwpid))
86*0Sstevel@tonic-gate return (elm);
87*0Sstevel@tonic-gate else
88*0Sstevel@tonic-gate elm = elm->l_next;
89*0Sstevel@tonic-gate }
90*0Sstevel@tonic-gate return (NULL);
91*0Sstevel@tonic-gate }
92*0Sstevel@tonic-gate
93*0Sstevel@tonic-gate lwp_info_t *
lwpid_get(pid_t pid,id_t lwpid)94*0Sstevel@tonic-gate lwpid_get(pid_t pid, id_t lwpid)
95*0Sstevel@tonic-gate {
96*0Sstevel@tonic-gate lwpid_t *elm = lwpid_getptr(pid, lwpid);
97*0Sstevel@tonic-gate if (elm)
98*0Sstevel@tonic-gate return (elm->l_lwp);
99*0Sstevel@tonic-gate else
100*0Sstevel@tonic-gate return (NULL);
101*0Sstevel@tonic-gate }
102*0Sstevel@tonic-gate
103*0Sstevel@tonic-gate int
lwpid_pidcheck(pid_t pid)104*0Sstevel@tonic-gate lwpid_pidcheck(pid_t pid)
105*0Sstevel@tonic-gate {
106*0Sstevel@tonic-gate lwpid_t *elm;
107*0Sstevel@tonic-gate elm = lwpid_tbl[pid % LWPID_TBL_SZ];
108*0Sstevel@tonic-gate while (elm) {
109*0Sstevel@tonic-gate if (elm->l_pid == pid)
110*0Sstevel@tonic-gate return (1);
111*0Sstevel@tonic-gate else
112*0Sstevel@tonic-gate elm = elm->l_next;
113*0Sstevel@tonic-gate }
114*0Sstevel@tonic-gate return (0);
115*0Sstevel@tonic-gate }
116