Blame nptl/tst-cond3.c

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/* Copyright (C) 2002-2018 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, see
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   <http://www.gnu.org/licenses/>.  */
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static int do_test (void);
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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/* Note that this test requires more than the standard.  It is
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   required that there are no spurious wakeups if only more readers
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   are added.  This is a reasonable demand.  */
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static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
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static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
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#define N 10
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static void *
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tf (void *arg)
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{
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  int i = (long int) arg;
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  int err;
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  /* Get the mutex.  */
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  err = pthread_mutex_lock (&mut;;
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  if (err != 0)
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    {
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      printf ("child %d mutex_lock failed: %s\n", i, strerror (err));
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      exit (1);
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    }
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  /* This call should never return.  */
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  xpthread_cond_wait (&cond, &mut;;
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  puts ("error: pthread_cond_wait in tf returned");
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  /* We should never get here.  */
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  exit (1);
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  return NULL;
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}
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static int
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do_test (void)
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{
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  int err;
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  int i;
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  for (i = 0; i < N; ++i)
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    {
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      pthread_t th;
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      if (i != 0)
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	{
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	  /* Release the mutex.  */
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	  err = pthread_mutex_unlock (&mut;;
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	  if (err != 0)
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	    {
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	      printf ("mutex_unlock %d failed: %s\n", i, strerror (err));
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	      return 1;
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	    }
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	}
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      err = pthread_create (&th, NULL, tf, (void *) (long int) i);
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      if (err != 0)
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	{
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	  printf ("create %d failed: %s\n", i, strerror (err));
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	  return 1;
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	}
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      /* Get the mutex.  */
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      err = pthread_mutex_lock (&mut;;
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      if (err != 0)
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	{
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	  printf ("mutex_lock %d failed: %s\n", i, strerror (err));
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	  return 1;
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	}
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    }
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  delayed_exit (1);
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  /* This call should never return.  */
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  xpthread_cond_wait (&cond, &mut;;
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  puts ("error: pthread_cond_wait in do_test returned");
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  return 1;
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}