1 /* $NetBSD: t_barrier.c,v 1.2 2010/11/03 16:10:22 christos Exp $ */
2 
3 /*
4  * Copyright (c) 2008 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 CONTRIBUTORS
17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26  * POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __COPYRIGHT("@(#) Copyright (c) 2008\
31  The NetBSD Foundation, inc. All rights reserved.");
32 __RCSID("$NetBSD: t_barrier.c,v 1.2 2010/11/03 16:10:22 christos Exp $");
33 
34 #include <pthread.h>
35 #include <stdio.h>
36 #include <unistd.h>
37 
38 #include <atf-c.h>
39 
40 #include "h_common.h"
41 
42 #define COUNT 5
43 
44 pthread_barrier_t barrier;
45 pthread_mutex_t mutex;
46 int serial_count;
47 int after_barrier_count;
48 
49 static void *
50 threadfunc(void *arg)
51 {
52 	int which = (int)(long)arg;
53 	int rv;
54 
55 	printf("thread %d entering barrier\n", which);
56 	rv = pthread_barrier_wait(&barrier);
57 	printf("thread %d leaving barrier -> %d\n", which, rv);
58 
59 	PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
60 	after_barrier_count++;
61 	if (rv == PTHREAD_BARRIER_SERIAL_THREAD)
62 		serial_count++;
63 	PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
64 
65 	return NULL;
66 }
67 
68 ATF_TC(barrier);
69 ATF_TC_HEAD(barrier, tc)
70 {
71 	atf_tc_set_md_var(tc, "descr", "Checks barriers");
72 }
73 ATF_TC_BODY(barrier, tc)
74 {
75 	int i;
76 	pthread_t new[COUNT];
77 	void *joinval;
78 
79 	PTHREAD_REQUIRE(pthread_mutex_init(&mutex, NULL));
80 	PTHREAD_REQUIRE(pthread_barrier_init(&barrier, NULL, COUNT));
81 
82 	for (i = 0; i < COUNT; i++) {
83 		PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
84 		ATF_REQUIRE_EQ(after_barrier_count, 0);
85 		PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
86 		PTHREAD_REQUIRE(pthread_create(&new[i], NULL, threadfunc,
87 						(void *)(long)i));
88 		sleep(2);
89 	}
90 
91 	for (i = 0; i < COUNT; i++) {
92 		PTHREAD_REQUIRE(pthread_join(new[i], &joinval));
93 		PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
94 		ATF_REQUIRE(after_barrier_count > i);
95 		PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
96 		printf("main joined with thread %d\n", i);
97 	}
98 
99 	PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
100 	ATF_REQUIRE_EQ(after_barrier_count, COUNT);
101 	PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
102 	ATF_REQUIRE_EQ(serial_count, 1);
103 }
104 
105 ATF_TP_ADD_TCS(tp)
106 {
107 	ATF_TP_ADD_TC(tp, barrier);
108 
109 	return atf_no_error();
110 }
111