glibc/nptl/tst-mutex7.c

/* Copyright (C) 2002 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <pthread.h>
#include <stdio.h>
#include <time.h>


static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;


#define ROUNDS 1000
#define N 100


static void *
tf (void *arg)
{
  int nr = (long int) arg;
  int cnt;
  struct timespec ts = { .tv_sec = 0, .tv_nsec = 11000 };

  for (cnt = 0; cnt < ROUNDS; ++cnt)
    {
      if (pthread_mutex_lock (&lock) != 0)
	{
	  printf ("thread %d: failed to get the lock\n", nr);
	  return (void *) 1l;
	}

      if (pthread_mutex_unlock (&lock) != 0)
	{
	  printf ("thread %d: failed to release the lock\n", nr);
	  return (void *) 1l;
	}

      nanosleep (&ts, NULL);
    }

  return NULL;
}


static int
do_test (void)
{
  pthread_t th[N];
  int cnt;

  if (pthread_mutex_lock (&lock) != 0)
    {
      puts ("locking in parent failed");
      return 1;
    }

  for (cnt = 0; cnt < N; ++cnt)
    if (pthread_create (&th[cnt], NULL, tf, (void *) (long int) cnt) != 0)
      {
	printf ("creating thread %d failed\n", cnt);
	return 1;
      }

  if (pthread_mutex_unlock (&lock) != 0)
    {
      puts ("unlocking in parent failed");
      return 1;
    }

  for (cnt = 0; cnt < N; ++cnt)
    if (pthread_join (th[cnt], NULL) != 0)
      {
	printf ("joining thread %d failed\n", cnt);
	return 1;
      }

  return 0;
}

#define TIMEOUT 60
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"