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glibc/nptl/tst-cond2.c
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/* Copyright (C) 2002-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <error.h> | |
#include <pthread.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; | |
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; | |
static pthread_barrier_t bar; | |
static void * | |
tf (void *a) | |
{ | |
int i = (long int) a; | |
int err; | |
printf ("child %d: lock\n", i); | |
err = pthread_mutex_lock (&mut); | |
if (err != 0) | |
error (EXIT_FAILURE, err, "locking in child failed"); | |
printf ("child %d: sync\n", i); | |
int e = pthread_barrier_wait (&bar); | |
if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) | |
{ | |
puts ("child: barrier_wait failed"); | |
exit (1); | |
} | |
printf ("child %d: wait\n", i); | |
err = pthread_cond_wait (&cond, &mut); | |
if (err != 0) | |
error (EXIT_FAILURE, err, "child %d: failed to wait", i); | |
printf ("child %d: woken up\n", i); | |
err = pthread_mutex_unlock (&mut); | |
if (err != 0) | |
error (EXIT_FAILURE, err, "child %d: unlock[2] failed", i); | |
printf ("child %d: done\n", i); | |
return NULL; | |
} | |
#define N 10 | |
static int | |
do_test (void) | |
{ | |
pthread_t th[N]; | |
int i; | |
int err; | |
printf ("&cond = %p\n&mut = %p\n", &cond, &mut); | |
if (pthread_barrier_init (&bar, NULL, 2) != 0) | |
{ | |
puts ("barrier_init failed"); | |
exit (1); | |
} | |
pthread_attr_t at; | |
if (pthread_attr_init (&at) != 0) | |
{ | |
puts ("attr_init failed"); | |
return 1; | |
} | |
if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0) | |
{ | |
puts ("attr_setstacksize failed"); | |
return 1; | |
} | |
for (i = 0; i < N; ++i) | |
{ | |
printf ("create thread %d\n", i); | |
err = pthread_create (&th[i], &at, tf, (void *) (long int) i); | |
if (err != 0) | |
error (EXIT_FAILURE, err, "cannot create thread %d", i); | |
printf ("wait for child %d\n", i); | |
/* Wait for the child to start up and get the mutex for the | |
conditional variable. */ | |
int e = pthread_barrier_wait (&bar); | |
if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) | |
{ | |
puts ("barrier_wait failed"); | |
exit (1); | |
} | |
} | |
if (pthread_attr_destroy (&at) != 0) | |
{ | |
puts ("attr_destroy failed"); | |
return 1; | |
} | |
puts ("get lock outselves"); | |
err = pthread_mutex_lock (&mut); | |
if (err != 0) | |
error (EXIT_FAILURE, err, "mut locking failed"); | |
puts ("broadcast"); | |
/* Wake up all threads. */ | |
err = pthread_cond_broadcast (&cond); | |
if (err != 0) | |
error (EXIT_FAILURE, err, "parent: broadcast failed"); | |
err = pthread_mutex_unlock (&mut); | |
if (err != 0) | |
error (EXIT_FAILURE, err, "mut unlocking failed"); | |
/* Join all threads. */ | |
for (i = 0; i < N; ++i) | |
{ | |
printf ("join thread %d\n", i); | |
err = pthread_join (th[i], NULL); | |
if (err != 0) | |
error (EXIT_FAILURE, err, "join of child %d failed", i); | |
} | |
puts ("done"); | |
return 0; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |