1 /* $NetBSD: thread.c,v 1.2 2011/08/07 14:03:15 rmind Exp $ */
2
3 /*-
4 * Copyright (c) 2010 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
17 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #if !defined(lint)
32 __RCSID("$NetBSD: thread.c,v 1.2 2011/08/07 14:03:15 rmind Exp $");
33 #endif /* !lint */
34
35 #include <sys/param.h>
36 #include <sys/kernel.h>
37 #include <sys/kthread.h>
38 #include <sys/mutex.h>
39 #include <sys/proc.h>
40
41 #include "kernspace.h"
42
43 static volatile int testit;
44
45 static void
jointhread(void * arg)46 jointhread(void *arg)
47 {
48
49 kpause("take5", false, 1, NULL);
50 testit = 1;
51 kthread_exit(0);
52 }
53
54 void
rumptest_threadjoin()55 rumptest_threadjoin()
56 {
57 struct lwp *newl;
58 int rv;
59
60 rv = kthread_create(PRI_NONE, KTHREAD_MUSTJOIN | KTHREAD_MPSAFE, NULL,
61 jointhread, NULL, &newl, "jointest");
62 if (rv)
63 panic("thread creation failed: %d", rv);
64 rv = kthread_join(newl);
65 if (rv)
66 panic("thread join failed: %d", rv);
67
68 if (testit != 1)
69 panic("new thread did not run");
70 }
71
72 static kmutex_t mtx;
73 static kcondvar_t cv;
74 static int value;
75
76 static void
thethread(void * arg)77 thethread(void *arg)
78 {
79
80 mutex_enter(&mtx);
81 value = 1;
82 cv_signal(&cv);
83 mutex_exit(&mtx);
84
85 kthread_exit(0);
86 }
87
88 void
rumptest_thread()89 rumptest_thread()
90 {
91 struct lwp *newl;
92 int rv;
93
94 mutex_init(&mtx, MUTEX_DEFAULT, IPL_NONE);
95 cv_init(&cv, "jooei");
96 rv = kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL,
97 thethread, NULL, &newl, "ktest");
98 if (rv)
99 panic("thread creation failed: %d", rv);
100
101 mutex_enter(&mtx);
102 while (value == 0)
103 cv_wait(&cv, &mtx);
104 mutex_exit(&mtx);
105
106 /* try to verify thread really exists and we don't crash */
107 kpause("take1", false, 1, NULL);
108 }
109