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
44pthread_barrier_t barrier;
45pthread_mutex_t mutex;
46int serial_count;
47int after_barrier_count;
48
49static void *
50threadfunc(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
68ATF_TC(barrier);
69ATF_TC_HEAD(barrier, tc)
70{
71	atf_tc_set_md_var(tc, "descr", "Checks barriers");
72}
73ATF_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
105ATF_TP_ADD_TCS(tp)
106{
107	ATF_TP_ADD_TC(tp, barrier);
108
109	return atf_no_error();
110}
111