Blame nptl/tst-cancel15.c

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/* Test sem_timedwait cancellation for contended case.
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   Copyright (C) 2003-2018 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>, 2003.
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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 <errno.h>
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#include <pthread.h>
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#include <semaphore.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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#include <sys/time.h>
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static pthread_barrier_t bar;
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static sem_t sem;
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static void
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cleanup (void *arg)
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{
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  static int ncall;
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  if (++ncall != 1)
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    {
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      puts ("second call to cleanup");
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      exit (1);
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    }
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}
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static void *
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tf (void *arg)
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{
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  int e;
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  pthread_cleanup_push (cleanup, NULL);
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  e = pthread_barrier_wait (&bar);
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  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
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    {
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      puts ("error: tf: 1st barrier_wait failed");
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      exit (1);
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    }
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  struct timeval tv;
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  (void) gettimeofday (&tv, NULL);
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  struct timespec ts;
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  TIMEVAL_TO_TIMESPEC (&tv, &ts);
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  /* Timeout in 5 seconds.  */
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  ts.tv_sec += 5;
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  /* This call should block and be cancelable.  */
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  errno = 0;
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  e = sem_timedwait (&sem, &ts);
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  pthread_cleanup_pop (0);
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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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  pthread_t th;
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  if (pthread_barrier_init (&bar, NULL, 2) != 0)
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    {
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      puts ("error: barrier_init failed");
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      exit (1);
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    }
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  if (sem_init (&sem, 0, 0) != 0)
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    {
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      puts ("error: sem_init failed");
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      exit (1);
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    }
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  if (pthread_create (&th, NULL, tf, NULL) != 0)
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    {
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      puts ("error: create failed");
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      exit (1);
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    }
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  int e = pthread_barrier_wait (&bar);
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  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
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    {
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      puts ("error: 1st barrier_wait failed");
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      exit (1);
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    }
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  /* Give the child a chance to go to sleep in sem_wait.  */
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  sleep (1);
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  /* Check whether cancellation is honored when waiting in sem_timedwait.  */
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  if (pthread_cancel (th) != 0)
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    {
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      puts ("error: 1st cancel failed");
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      exit (1);
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    }
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  void *r;
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  if (pthread_join (th, &r) != 0)
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    {
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      puts ("error: join failed");
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      exit (1);
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    }
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  if (r != PTHREAD_CANCELED)
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    {
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      puts ("error: thread not canceled");
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      exit (1);
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    }
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  return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"