Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/nptl/tst-cond20.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
169 lines (138 sloc)
3.86 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Copyright (C) 2004-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. | |
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 <pthread.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <unistd.h> | |
#define N 10 | |
#define ROUNDS 1000 | |
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; | |
static pthread_cond_t cond2 = PTHREAD_COND_INITIALIZER; | |
static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; | |
static pthread_barrier_t b; | |
static int count; | |
static void * | |
tf (void *p) | |
{ | |
int i; | |
for (i = 0; i < ROUNDS; ++i) | |
{ | |
pthread_mutex_lock (&mut); | |
if (++count == N) | |
pthread_cond_signal (&cond2); | |
#ifdef TIMED | |
struct timeval tv; | |
gettimeofday (&tv, NULL); | |
struct timespec ts; | |
/* Wait three seconds. */ | |
ts.tv_sec = tv.tv_sec + 3; | |
ts.tv_nsec = tv.tv_usec * 1000; | |
pthread_cond_timedwait (&cond, &mut, &ts); | |
#else | |
pthread_cond_wait (&cond, &mut); | |
#endif | |
pthread_mutex_unlock (&mut); | |
int err = pthread_barrier_wait (&b); | |
if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD) | |
{ | |
puts ("child: barrier_wait failed"); | |
exit (1); | |
} | |
err = pthread_barrier_wait (&b); | |
if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD) | |
{ | |
puts ("child: barrier_wait failed"); | |
exit (1); | |
} | |
} | |
return NULL; | |
} | |
static int | |
do_test (void) | |
{ | |
if (pthread_barrier_init (&b, NULL, N + 1) != 0) | |
{ | |
puts ("barrier_init failed"); | |
return 1; | |
} | |
pthread_mutex_lock (&mut); | |
int i, j, err; | |
pthread_t th[N]; | |
for (i = 0; i < N; ++i) | |
if ((err = pthread_create (&th[i], NULL, tf, NULL)) != 0) | |
{ | |
printf ("cannot create thread %d: %s\n", i, strerror (err)); | |
return 1; | |
} | |
for (i = 0; i < ROUNDS; ++i) | |
{ | |
pthread_cond_wait (&cond2, &mut); | |
if (i & 1) | |
pthread_mutex_unlock (&mut); | |
if (i & 2) | |
pthread_cond_broadcast (&cond); | |
else if (i & 4) | |
for (j = 0; j < N; ++j) | |
pthread_cond_signal (&cond); | |
else | |
{ | |
for (j = 0; j < (i / 8) % N; ++j) | |
pthread_cond_signal (&cond); | |
pthread_cond_broadcast (&cond); | |
} | |
if ((i & 1) == 0) | |
pthread_mutex_unlock (&mut); | |
err = pthread_cond_destroy (&cond); | |
if (err) | |
{ | |
printf ("pthread_cond_destroy failed: %s\n", strerror (err)); | |
return 1; | |
} | |
/* Now clobber the cond variable which has been successfully | |
destroyed above. */ | |
memset (&cond, (char) i, sizeof (cond)); | |
err = pthread_barrier_wait (&b); | |
if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD) | |
{ | |
puts ("parent: barrier_wait failed"); | |
return 1; | |
} | |
pthread_mutex_lock (&mut); | |
err = pthread_barrier_wait (&b); | |
if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD) | |
{ | |
puts ("parent: barrier_wait failed"); | |
return 1; | |
} | |
count = 0; | |
err = pthread_cond_init (&cond, NULL); | |
if (err) | |
{ | |
printf ("pthread_cond_init failed: %s\n", strerror (err)); | |
return 1; | |
} | |
} | |
for (i = 0; i < N; ++i) | |
if ((err = pthread_join (th[i], NULL)) != 0) | |
{ | |
printf ("failed to join thread %d: %s\n", i, strerror (err)); | |
return 1; | |
} | |
puts ("done"); | |
return 0; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |