t_sem.c revision 272343
1272343Sngie/* $NetBSD: t_sem.c,v 1.7 2012/03/09 19:46:37 joerg Exp $ */ 2272343Sngie 3272343Sngie/* 4272343Sngie * Copyright (c) 2008, 2010 The NetBSD Foundation, Inc. 5272343Sngie * All rights reserved. 6272343Sngie * 7272343Sngie * Redistribution and use in source and binary forms, with or without 8272343Sngie * modification, are permitted provided that the following conditions 9272343Sngie * are met: 10272343Sngie * 1. Redistributions of source code must retain the above copyright 11272343Sngie * notice, this list of conditions and the following disclaimer. 12272343Sngie * 2. Redistributions in binary form must reproduce the above copyright 13272343Sngie * notice, this list of conditions and the following disclaimer in the 14272343Sngie * documentation and/or other materials provided with the distribution. 15272343Sngie * 16272343Sngie * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17272343Sngie * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18272343Sngie * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19272343Sngie * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20272343Sngie * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21272343Sngie * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22272343Sngie * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23272343Sngie * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24272343Sngie * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25272343Sngie * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26272343Sngie * POSSIBILITY OF SUCH DAMAGE. 27272343Sngie */ 28272343Sngie 29272343Sngie/*- 30272343Sngie * Copyright (c)2004 YAMAMOTO Takashi, 31272343Sngie * All rights reserved. 32272343Sngie * 33272343Sngie * Redistribution and use in source and binary forms, with or without 34272343Sngie * modification, are permitted provided that the following conditions 35272343Sngie * are met: 36272343Sngie * 1. Redistributions of source code must retain the above copyright 37272343Sngie * notice, this list of conditions and the following disclaimer. 38272343Sngie * 2. Redistributions in binary form must reproduce the above copyright 39272343Sngie * notice, this list of conditions and the following disclaimer in the 40272343Sngie * documentation and/or other materials provided with the distribution. 41272343Sngie * 42272343Sngie * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 43272343Sngie * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 44272343Sngie * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 45272343Sngie * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 46272343Sngie * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 47272343Sngie * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 48272343Sngie * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 49272343Sngie * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 50272343Sngie * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 51272343Sngie * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52272343Sngie * SUCH DAMAGE. 53272343Sngie */ 54272343Sngie 55272343Sngie/**************************************************************************** 56272343Sngie * 57272343Sngie * Copyright (C) 2000 Jason Evans <jasone@freebsd.org>. 58272343Sngie * All rights reserved. 59272343Sngie * 60272343Sngie * Redistribution and use in source and binary forms, with or without 61272343Sngie * modification, are permitted provided that the following conditions 62272343Sngie * are met: 63272343Sngie * 1. Redistributions of source code must retain the above copyright 64272343Sngie * notice(s), this list of conditions and the following disclaimer as 65272343Sngie * the first lines of this file unmodified other than the possible 66272343Sngie * addition of one or more copyright notices. 67272343Sngie * 2. Redistributions in binary form must reproduce the above copyright 68272343Sngie * notice(s), this list of conditions and the following disclaimer in 69272343Sngie * the documentation and/or other materials provided with the 70272343Sngie * distribution. 71272343Sngie * 72272343Sngie * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY 73272343Sngie * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 74272343Sngie * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 75272343Sngie * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE 76272343Sngie * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 77272343Sngie * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 78272343Sngie * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 79272343Sngie * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 80272343Sngie * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 81272343Sngie * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 82272343Sngie * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 83272343Sngie * 84272343Sngie ****************************************************************************/ 85272343Sngie 86272343Sngie#include <sys/cdefs.h> 87272343Sngie__COPYRIGHT("@(#) Copyright (c) 2008, 2010\ 88272343Sngie The NetBSD Foundation, inc. All rights reserved."); 89272343Sngie__RCSID("$NetBSD: t_sem.c,v 1.7 2012/03/09 19:46:37 joerg Exp $"); 90272343Sngie 91272343Sngie#include <errno.h> 92272343Sngie#include <fcntl.h> 93272343Sngie#include <pthread.h> 94272343Sngie#include <semaphore.h> 95272343Sngie#include <signal.h> 96272343Sngie#include <stdio.h> 97272343Sngie#include <stdlib.h> 98272343Sngie#include <string.h> 99272343Sngie#include <unistd.h> 100272343Sngie 101272343Sngie#include <atf-c.h> 102272343Sngie#include <atf-c/config.h> 103272343Sngie 104272343Sngie#include "h_common.h" 105272343Sngie 106272343Sngie#define NTHREADS 10 107272343Sngie 108272343Sngie#define _LIBC_R_ 109272343Sngie 110272343Sngie#define SEM_REQUIRE(x) \ 111272343Sngie ATF_REQUIRE_EQ_MSG(x, 0, "%s", strerror(errno)) 112272343Sngie 113272343Sngiestatic sem_t sem; 114272343Sngie 115272343SngieATF_TC(named); 116272343SngieATF_TC_HEAD(named, tc) 117272343Sngie{ 118272343Sngie atf_tc_set_md_var(tc, "descr", "Checks named semaphores"); 119272343Sngie} 120272343SngieATF_TC_BODY(named, tc) 121272343Sngie{ 122272343Sngie sem_t *semp; 123272343Sngie 124272343Sngie ATF_REQUIRE_MSG(-1 != sysconf(_SC_SEMAPHORES), "%s", strerror(errno)); 125272343Sngie 126272343Sngie printf("Test begin\n"); 127272343Sngie 128272343Sngie (void) sem_unlink("/foo"); 129272343Sngie semp = sem_open("/foo", O_CREAT | O_EXCL, 0644, 0); 130272343Sngie ATF_REQUIRE_MSG(semp != SEM_FAILED, "%s", strerror(errno)); 131272343Sngie SEM_REQUIRE(sem_close(semp)); 132272343Sngie SEM_REQUIRE(sem_unlink("/foo")); 133272343Sngie 134272343Sngie printf("Test end\n"); 135272343Sngie} 136272343Sngie 137272343SngieATF_TC(unnamed); 138272343SngieATF_TC_HEAD(unnamed, tc) 139272343Sngie{ 140272343Sngie atf_tc_set_md_var(tc, "descr", "Checks unnamed semaphores"); 141272343Sngie} 142272343Sngie 143272343Sngiestatic void * 144272343Sngieentry(void * a_arg) 145272343Sngie{ 146272343Sngie pthread_t self = pthread_self(); 147272343Sngie sem_t *semp = (sem_t *) a_arg; 148272343Sngie 149272343Sngie printf("Thread %p waiting for semaphore...\n", self); 150272343Sngie sem_wait(semp); 151272343Sngie printf("Thread %p got semaphore\n", self); 152272343Sngie 153272343Sngie return NULL; 154272343Sngie} 155272343Sngie 156272343SngieATF_TC_BODY(unnamed, tc) 157272343Sngie{ 158272343Sngie sem_t sem_a, sem_b; 159272343Sngie pthread_t threads[NTHREADS]; 160272343Sngie unsigned i, j; 161272343Sngie int val; 162272343Sngie 163272343Sngie ATF_REQUIRE_MSG(-1 != sysconf(_SC_SEMAPHORES), "%s", strerror(errno)); 164272343Sngie 165272343Sngie printf("Test begin\n"); 166272343Sngie 167272343Sngie SEM_REQUIRE(sem_init(&sem_b, 0, 0)); 168272343Sngie SEM_REQUIRE(sem_getvalue(&sem_b, &val)); 169272343Sngie ATF_REQUIRE_EQ(0, val); 170272343Sngie 171272343Sngie SEM_REQUIRE(sem_post(&sem_b)); 172272343Sngie SEM_REQUIRE(sem_getvalue(&sem_b, &val)); 173272343Sngie ATF_REQUIRE_EQ(1, val); 174272343Sngie 175272343Sngie SEM_REQUIRE(sem_wait(&sem_b)); 176272343Sngie ATF_REQUIRE_EQ(sem_trywait(&sem_b), -1); 177272343Sngie ATF_REQUIRE_EQ(errno, EAGAIN); 178272343Sngie SEM_REQUIRE(sem_post(&sem_b)); 179272343Sngie SEM_REQUIRE(sem_trywait(&sem_b)); 180272343Sngie SEM_REQUIRE(sem_post(&sem_b)); 181272343Sngie SEM_REQUIRE(sem_wait(&sem_b)); 182272343Sngie SEM_REQUIRE(sem_post(&sem_b)); 183272343Sngie 184272343Sngie SEM_REQUIRE(sem_destroy(&sem_b)); 185272343Sngie 186272343Sngie SEM_REQUIRE(sem_init(&sem_a, 0, 0)); 187272343Sngie 188272343Sngie for (j = 0; j < 2; j++) { 189272343Sngie for (i = 0; i < NTHREADS; i++) { 190272343Sngie PTHREAD_REQUIRE(pthread_create(&threads[i], NULL, 191272343Sngie entry, (void *) &sem_a)); 192272343Sngie } 193272343Sngie 194272343Sngie for (i = 0; i < NTHREADS; i++) { 195272343Sngie usleep(10000); 196272343Sngie printf("main loop %u: posting...\n", j+1); 197272343Sngie SEM_REQUIRE(sem_post(&sem_a)); 198272343Sngie } 199272343Sngie 200272343Sngie for (i = 0; i < NTHREADS; i++) { 201272343Sngie PTHREAD_REQUIRE(pthread_join(threads[i], NULL)); 202272343Sngie } 203272343Sngie } 204272343Sngie 205272343Sngie SEM_REQUIRE(sem_destroy(&sem_a)); 206272343Sngie 207272343Sngie printf("Test end\n"); 208272343Sngie} 209272343Sngie 210272343Sngiestatic void 211272343Sngiesighandler(int signo) 212272343Sngie{ 213272343Sngie /* printf("signal %d\n", signo); */ 214272343Sngie 215272343Sngie ATF_REQUIRE_EQ_MSG(signo, SIGALRM, "unexpected signal"); 216272343Sngie SEM_REQUIRE(sem_post(&sem)); 217272343Sngie} 218272343Sngie 219272343Sngiestatic void 220272343Sngiealarm_ms(const int ms) 221272343Sngie{ 222272343Sngie struct itimerval timer; 223272343Sngie timer.it_interval.tv_sec = 0; 224272343Sngie timer.it_interval.tv_usec = 0; 225272343Sngie timer.it_value.tv_sec = 0; 226272343Sngie timer.it_value.tv_usec = ms * 1000; 227272343Sngie ATF_REQUIRE(setitimer(ITIMER_REAL, &timer, NULL) == 0); 228272343Sngie} 229272343Sngie 230272343Sngiestatic void * 231272343Sngiethreadfunc(void *arg) 232272343Sngie{ 233272343Sngie int i, ret; 234272343Sngie 235272343Sngie printf("Entering loop\n"); 236272343Sngie for (i = 0; i < 500; ) { 237272343Sngie if ((i & 1) != 0) { 238272343Sngie do { 239272343Sngie ret = sem_wait(&sem); 240272343Sngie } while (ret == -1 && errno == EINTR); 241272343Sngie ATF_REQUIRE(ret == 0); 242272343Sngie } else { 243272343Sngie ret = sem_trywait(&sem); 244272343Sngie if (ret == -1) { 245272343Sngie ATF_REQUIRE(errno == EAGAIN); 246272343Sngie continue; 247272343Sngie } 248272343Sngie } 249272343Sngie printf("%s: %d\n", __func__, i); 250272343Sngie alarm_ms(5); 251272343Sngie i++; 252272343Sngie } 253272343Sngie 254272343Sngie return NULL; 255272343Sngie} 256272343Sngie 257272343Sngiestatic void 258272343Sngiebefore_start_test(const bool use_pthread) 259272343Sngie{ 260272343Sngie pthread_t t; 261272343Sngie 262272343Sngie SEM_REQUIRE(sem_init(&sem, 0, 0)); 263272343Sngie ATF_REQUIRE(SIG_ERR != signal(SIGALRM, sighandler)); 264272343Sngie 265272343Sngie alarm_ms(5); 266272343Sngie 267272343Sngie if (use_pthread) { 268272343Sngie PTHREAD_REQUIRE(pthread_create(&t, NULL, threadfunc, NULL)); 269272343Sngie PTHREAD_REQUIRE(pthread_join(t, NULL)); 270272343Sngie } else { 271272343Sngie threadfunc(NULL); 272272343Sngie } 273272343Sngie} 274272343Sngie 275272343SngieATF_TC(before_start_no_threads); 276272343SngieATF_TC_HEAD(before_start_no_threads, tc) 277272343Sngie{ 278272343Sngie atf_tc_set_md_var(tc, "descr", "Checks using semaphores without any " 279272343Sngie "thread running"); 280272343Sngie atf_tc_set_md_var(tc, "timeout", "40"); 281272343Sngie} 282272343SngieATF_TC_BODY(before_start_no_threads, tc) 283272343Sngie{ 284272343Sngie before_start_test(false); 285272343Sngie} 286272343Sngie 287272343SngieATF_TC(before_start_one_thread); 288272343SngieATF_TC_HEAD(before_start_one_thread, tc) 289272343Sngie{ 290272343Sngie atf_tc_set_md_var(tc, "descr", "Checks using semaphores before " 291272343Sngie "starting one thread"); 292272343Sngie atf_tc_set_md_var(tc, "timeout", "40"); 293272343Sngie} 294272343SngieATF_TC_BODY(before_start_one_thread, tc) 295272343Sngie{ 296272343Sngie before_start_test(true); 297272343Sngie} 298272343Sngie 299272343SngieATF_TP_ADD_TCS(tp) 300272343Sngie{ 301272343Sngie ATF_TP_ADD_TC(tp, named); 302272343Sngie ATF_TP_ADD_TC(tp, unnamed); 303272343Sngie ATF_TP_ADD_TC(tp, before_start_no_threads); 304272343Sngie ATF_TP_ADD_TC(tp, before_start_one_thread); 305272343Sngie 306272343Sngie return atf_no_error(); 307272343Sngie} 308