1 /* $OpenBSD: sleep.c,v 1.4 2003/07/31 21:48:06 deraadt Exp $ */
2 /*
3 * Copyright (c) 1993, 1994, 1995, 1996 by Chris Provenzano and contributors,
4 * proven@mit.edu All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Chris Provenzano,
17 * the University of California, Berkeley, and contributors.
18 * 4. Neither the name of Chris Provenzano, the University, nor the names of
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO, THE REGENTS OR
26 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 /* ==== test_sleep.c =========================================================
36 * Copyright (c) 1993 by Chris Provenzano, proven@athena.mit.edu
37 *
38 * Description : Test context switch functionality.
39 *
40 * 1.00 93/08/04 proven
41 * -Started coding this file.
42 */
43
44 #include <pthread.h>
45 #include <stdio.h>
46 #include <unistd.h>
47 #include <stdlib.h>
48 #include "test.h"
49
50 const char buf[] = "abcdefghijklimnopqrstuvwxyz";
51 int fd = 1;
52
53 static void *
new_thread(void * arg)54 new_thread(void* arg)
55 {
56 int i;
57
58 for (i = 0; i < 10; i++) {
59 write(fd, buf + (long) arg, 1);
60 sleep(1);
61 }
62 return NULL;
63 }
64
65 int
main(int argc,char * argv[])66 main(int argc, char *argv[])
67 {
68 pthread_t thread[2];
69 int count = sizeof thread/sizeof thread[0];
70 long i;
71
72 printf("Going to sleep\n");
73 sleep(3);
74 printf("Done sleeping\n");
75
76 for(i = 0; i < count; i++)
77 CHECKr(pthread_create(&thread[i], NULL, new_thread,
78 (void *) i));
79
80 for (i = 0; i < count; i++)
81 CHECKr(pthread_join(thread[i], NULL));
82
83 CHECKe(write(STDOUT_FILENO, "\n", 1));
84 SUCCEED;
85 }
86