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t_condwait.c revision 1.4 
      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 
     45 static const int debug = 1;
     46 
     47 static void *
     48 run(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 
    103 static void
    104 cond_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 
    115 ATF_TC(cond_wait_real);
    116 ATF_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 
    122 ATF_TC_BODY(cond_wait_real, tc) {
    123 	cond_wait(CLOCK_REALTIME, "CLOCK_REALTIME");
    124 }
    125 
    126 ATF_TC(cond_wait_mono);
    127 ATF_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 
    133 ATF_TC_BODY(cond_wait_mono, tc) {
    134 	cond_wait(CLOCK_MONOTONIC, "CLOCK_MONOTONIC");
    135 }
    136 
    137 ATF_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