1/*	$NetBSD: test_rwlock1.c,v 1.5 2008/03/28 20:28:27 ad Exp $	*/
2
3/*-
4 * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Andrew Doran.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: test_rwlock1.c,v 1.5 2008/03/28 20:28:27 ad Exp $");
34
35#include <sys/param.h>
36#include <sys/ioctl.h>
37#include <sys/systm.h>
38#include <sys/proc.h>
39#include <sys/kthread.h>
40#include <sys/kernel.h>
41
42#define	NTHREADS	32
43#define	SECONDS		60
44
45int	testcall(struct lwp *, void *, register_t *);
46void	thread1(void *);
47void	thread_exit(void);
48
49lwp_t		*test_threads[NTHREADS];
50kmutex_t	test_mutex;
51krwlock_t	test_rwlock;
52kcondvar_t	test_cv;
53int		test_count;
54int		test_exit;
55
56static int primes[NTHREADS] = {
57	 17,  19,  23,  29,
58	 31,  37,  41,  43,
59	 47,  53,  59,  61,
60	 67,  71,  73,  79,
61	 83,  89,  97, 101,
62	103, 107, 109, 113,
63	127, 131, 137, 139,
64	149, 151, 157, 163,
65};
66
67void
68thread_exit(void)
69{
70
71	mutex_enter(&test_mutex);
72	if (--test_count == 0)
73		cv_signal(&test_cv);
74	mutex_exit(&test_mutex);
75	kthread_exit(0);
76}
77
78void
79thread1(void *cookie)
80{
81	int count;
82	krw_t op;
83
84	for (count = 0; !test_exit; count++) {
85		if (count % *(int *)cookie == 0)
86			op = RW_WRITER;
87		else
88			op = RW_READER;
89		rw_enter(&test_rwlock, op);
90		if ((arc4random() % 11) == 0)
91			yield();
92		rw_exit(&test_rwlock);
93		if ((arc4random() % 23) == 0)
94			yield();
95	}
96
97	thread_exit();
98}
99
100int
101testcall(struct lwp *l, void *uap, register_t *retval)
102{
103	int i;
104
105	mutex_init(&test_mutex, MUTEX_DEFAULT, IPL_NONE);
106	rw_init(&test_rwlock);
107	cv_init(&test_cv, "testcv");
108
109	printf("test: creating threads\n");
110
111	test_count = NTHREADS;
112	test_exit = 0;
113
114	for (i = 0; i < test_count; i++)
115		kthread_create(0, KTHREAD_MPSAFE, NULL, thread1, &primes[i],
116		    &test_threads[i], "thread%d", i);
117
118	printf("test: sleeping\n");
119
120	mutex_enter(&test_mutex);
121	while (test_count != 0) {
122		(void)cv_timedwait(&test_cv, &test_mutex, hz * SECONDS);
123		test_exit = 1;
124	}
125	mutex_exit(&test_mutex);
126
127	printf("test: finished\n");
128
129	cv_destroy(&test_cv);
130	rw_destroy(&test_rwlock);
131	mutex_destroy(&test_mutex);
132
133	return 0;
134}
135