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/* Copyright (C) 2003-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <support/check.h>
#include <support/timespec.h>
#include <support/xthread.h>
#include <support/xtime.h>
static void
wait_code (void)
{
struct timespec ts = { .tv_sec = 0, .tv_nsec = 200000000 };
while (nanosleep (&ts, &ts) < 0)
;
}
#ifdef WAIT_IN_CHILD
static pthread_barrier_t b;
#endif
static int
thread_join (pthread_t thread, void **retval)
{
#if defined USE_PTHREAD_TIMEDJOIN_NP
const struct timespec ts = timespec_add (xclock_now (CLOCK_REALTIME),
make_timespec (1000, 0));
return pthread_timedjoin_np (thread, retval, &ts);
#elif defined USE_PTHREAD_CLOCKJOIN_NP_REALTIME
const struct timespec ts = timespec_add (xclock_now (CLOCK_REALTIME),
make_timespec (1000, 0));
return pthread_clockjoin_np (thread, retval, CLOCK_REALTIME, &ts);
#elif defined USE_PTHREAD_CLOCKJOIN_NP_MONOTONIC
const struct timespec ts = timespec_add (xclock_now (CLOCK_MONOTONIC),
make_timespec (1000, 0));
return pthread_clockjoin_np (thread, retval, CLOCK_MONOTONIC, &ts);
#else
return pthread_join (thread, retval);
#endif
}
static void *
tf1 (void *arg)
{
#ifdef WAIT_IN_CHILD
xpthread_barrier_wait (&b);
wait_code ();
#endif
thread_join ((pthread_t) arg, NULL);
exit (42);
}
static void *
tf2 (void *arg)
{
#ifdef WAIT_IN_CHILD
xpthread_barrier_wait (&b);
wait_code ();
#endif
thread_join ((pthread_t) arg, NULL);
exit (43);
}
static int
do_test (void)
{
#ifdef WAIT_IN_CHILD
xpthread_barrier_init (&b, NULL, 2);
#endif
pthread_t th;
int err = thread_join (pthread_self (), NULL);
if (err == 0)
{
puts ("1st circular join succeeded");
return 1;
}
if (err != EDEADLK)
{
printf ("1st circular join %d, not EDEADLK\n", err);
return 1;
}
th = xpthread_create (NULL, tf1, (void *) pthread_self ());
#ifndef WAIT_IN_CHILD
wait_code ();
#endif
xpthread_cancel (th);
#ifdef WAIT_IN_CHILD
xpthread_barrier_wait (&b);
#endif
void *r;
err = thread_join (th, &r);
if (err != 0)
{
printf ("cannot join 1st thread: %d\n", err);
return 1;
}
if (r != PTHREAD_CANCELED)
{
puts ("1st thread not canceled");
return 1;
}
err = thread_join (pthread_self (), NULL);
if (err == 0)
{
puts ("2nd circular join succeeded");
return 1;
}
if (err != EDEADLK)
{
printf ("2nd circular join %d, not EDEADLK\n", err);
return 1;
}
th = xpthread_create (NULL, tf2, (void *) pthread_self ());
#ifndef WAIT_IN_CHILD
wait_code ();
#endif
xpthread_cancel (th);
#ifdef WAIT_IN_CHILD
xpthread_barrier_wait (&b);
#endif
if (thread_join (th, &r) != 0)
{
puts ("cannot join 2nd thread");
return 1;
}
if (r != PTHREAD_CANCELED)
{
puts ("2nd thread not canceled");
return 1;
}
err = thread_join (pthread_self (), NULL);
if (err == 0)
{
puts ("3rd circular join succeeded");
return 1;
}
if (err != EDEADLK)
{
printf ("3rd circular join %d, not EDEADLK\n", err);
return 1;
}
return 0;
}
#include <support/test-driver.c>
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