1 /*-
2  * Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  */
27 
28 #include <pthread.h>
29 #include <stdio.h>
30 #include <signal.h>
31 #include <stdlib.h>
32 #include <unistd.h>
33 #include <fcntl.h>
34 #include <string.h>
35 #include <err.h>
36 
37 #include "stress.h"
38 
39 #define NTHREADS 256
40 
41 volatile int done = 0;
42 
43 int
44 setup(int nb)
45 {
46 	return (0);
47 }
48 
49 void
50 cleanup(void)
51 {
52 }
53 
54 void *
55 thr1(void *arg)
56 {
57 	return (0);
58 }
59 
60 void *
61 thr2(void *arg)
62 {
63 	while (done == 0)
64 		pthread_yield();
65 	return (0);
66 }
67 
68 int
69 test(void)
70 {
71 	pthread_t threads[NTHREADS];
72 	int i;
73 	int r;
74 
75 	for (i = 0; i < NTHREADS; i++)
76 		if ((r = pthread_create(&threads[i], NULL, thr1, 0)) != 0)
77 			err(1, "pthread_create(): %s\n", strerror(r));
78 
79 	for (i = 0; i < NTHREADS; i++)
80 		if (pthread_join(threads[i], NULL) != 0)
81 			err(1, "pthread_join(%d)", i);
82 
83 	for (i = 0; i < NTHREADS; i++)
84 		if ((r = pthread_create(&threads[i], NULL, thr2, 0)) != 0)
85 			err(1, "pthread_create(): %s\n", strerror(r));
86 	done = 1;
87 
88 	for (i = 0; i < NTHREADS; i++)
89 		if (pthread_join(threads[i], NULL) != 0)
90 			err(1, "pthread_join(%d)", i);
91 
92 	return (0);
93 }
94