t_condwait.c revision 272345 
1/* $NetBSD: t_condwait.c,v 1.4 2013/04/12 17:18:11 christos Exp $ */
2
3/*
4 * Copyright (c) 2013 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#include <sys/cdefs.h>
29__RCSID("$NetBSD: t_condwait.c,v 1.4 2013/04/12 17:18:11 christos Exp $");
30
31#include <errno.h>
32#include <pthread.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <string.h>
36#include <time.h>
37#include <unistd.h>
38
39#include <atf-c.h>
40
41#include "isqemu.h"
42
43#define WAITTIME 2	/* Timeout wait secound */
44
45static const int debug = 1;
46
47static void *
48run(void *param)
49{
50	struct timespec ts, to, te;
51	clockid_t clck;
52	pthread_condattr_t attr;
53	pthread_cond_t cond;
54	pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
55	int ret = 0;
56
57
58	clck = *(clockid_t *)param;
59	pthread_condattr_init(&attr);
60	pthread_condattr_setclock(&attr, clck); /* MONOTONIC or MONOTONIC */
61	pthread_cond_init(&cond, &attr);
62
63	ATF_REQUIRE_EQ((ret = pthread_mutex_lock(&m)), 0);
64
65	ATF_REQUIRE_EQ(clock_gettime(clck, &ts), 0);
66	to = ts;
67
68	if (debug)
69		printf("started: %lld.%09ld sec\n", (long long)to.tv_sec,
70		    to.tv_nsec);
71
72	ts.tv_sec += WAITTIME;	/* Timeout wait */
73
74	switch (ret = pthread_cond_timedwait(&cond, &m, &ts)) {
75	case ETIMEDOUT:
76		/* Timeout */
77		ATF_REQUIRE_EQ(clock_gettime(clck, &te), 0);
78		timespecsub(&te, &to, &to);
79		if (debug) {
80			printf("timeout: %lld.%09ld sec\n",
81			    (long long)te.tv_sec, te.tv_nsec);
82			printf("elapsed: %lld.%09ld sec\n",
83			    (long long)to.tv_sec, to.tv_nsec);
84		}
85		if (isQEMU()) {
86			double to_seconds = to.tv_sec + 1e-9 * to.tv_nsec;
87			ATF_REQUIRE(to_seconds >= WAITTIME * 0.9);
88			/* Loose upper limit because of qemu timing bugs */
89			ATF_REQUIRE(to_seconds < WAITTIME * 2.5);
90		} else {
91			ATF_REQUIRE_EQ(to.tv_sec, WAITTIME);
92		}
93		break;
94	default:
95		ATF_REQUIRE_MSG(0, "pthread_cond_timedwait: %s", strerror(ret));
96	}
97
98	ATF_REQUIRE_MSG(!(ret = pthread_mutex_unlock(&m)),
99	    "pthread_mutex_unlock: %s", strerror(ret));
100	pthread_exit(&ret);
101}
102
103static void
104cond_wait(clockid_t clck, const char *msg) {
105	pthread_t child;
106
107	if (debug)
108		printf( "**** %s clock wait starting\n", msg);
109	ATF_REQUIRE_EQ(pthread_create(&child, NULL, run, &clck), 0);
110	ATF_REQUIRE_EQ(pthread_join(child, NULL), 0); /* wait for terminate */
111	if (debug)
112		printf( "**** %s clock wait ended\n", msg);
113}
114
115ATF_TC(cond_wait_real);
116ATF_TC_HEAD(cond_wait_real, tc)
117{
118	atf_tc_set_md_var(tc, "descr", "Checks pthread_cond_timedwait "
119	    "with CLOCK_REALTIME");
120}
121
122ATF_TC_BODY(cond_wait_real, tc) {
123	cond_wait(CLOCK_REALTIME, "CLOCK_REALTIME");
124}
125
126ATF_TC(cond_wait_mono);
127ATF_TC_HEAD(cond_wait_mono, tc)
128{
129	atf_tc_set_md_var(tc, "descr", "Checks pthread_cond_timedwait "
130	    "with CLOCK_MONOTONIC");
131}
132
133ATF_TC_BODY(cond_wait_mono, tc) {
134	cond_wait(CLOCK_MONOTONIC, "CLOCK_MONOTONIC");
135}
136
137ATF_TP_ADD_TCS(tp)
138{
139	ATF_TP_ADD_TC(tp, cond_wait_real);
140	ATF_TP_ADD_TC(tp, cond_wait_mono);
141	return 0;
142}
143