glibc/nptl/tst-cancel17.c

/* Copyright (C) 2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.

   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 <aio.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>


static pthread_barrier_t b;


/* Cleanup handling test.  */
static int cl_called;

static void
cl (void *arg)
{
  ++cl_called;
}


static void *
tf (void *arg)
{
  int r = pthread_barrier_wait (&b);
  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("barrier_wait failed");
      exit (1);
    }

  pthread_cleanup_push (cl, NULL);

  const struct aiocb *l[1] = { arg };

  aio_suspend (l, 1, NULL);

  pthread_cleanup_pop (0);

  puts ("aio_suspend returned");

  exit (1);
}


static int
do_test (void)
{
  int fds[2];
  if (pipe (fds) != 0)
    {
      puts ("pipe failed");
      return 1;
    }

  struct aiocb a;
  char mem[1];
  memset (&a, '\0', sizeof (a));
  a.aio_fildes = fds[0];
  a.aio_buf = mem;
  a.aio_nbytes = sizeof (mem);
  if (aio_read (&a) != 0)
    {
      puts ("aio_read failed");
      return 1;
    }

  if (pthread_barrier_init (&b, NULL, 2) != 0)
    {
      puts ("barrier_init failed");
      return 1;
    }

  pthread_t th;
  if (pthread_create (&th, NULL, tf, &a) != 0)
    {
      puts ("1st create failed");
      return 1;
    }

  int r = pthread_barrier_wait (&b);
  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("barrier_wait failed");
      exit (1);
    }

  struct timespec  ts = { .tv_sec = 0, .tv_nsec = 100000000 };
  while (nanosleep (&ts, &ts) != 0)
    continue;

  puts ("going to cancel in-time");
  if (pthread_cancel (th) != 0)
    {
      puts ("1st cancel failed");
      return 1;
    }

  void *status;
  if (pthread_join (th, &status) != 0)
    {
      puts ("1st join failed");
      return 1;
    }
  if (status != PTHREAD_CANCELED)
    {
      puts ("1st thread not canceled");
      return 1;
    }

  if (cl_called == 0)
    {
      puts ("cleanup handler not called");
      return 1;
    }
  if (cl_called > 1)
    {
      puts ("cleanup handler called more than once");
      return 1;
    }

  puts ("in-time cancellation succeeded");
  aio_cancel (fds[0], &a);


  cl_called = 0;

  memset (&a, '\0', sizeof (a));
  a.aio_fildes = fds[1];
  a.aio_buf = mem;
  a.aio_nbytes = sizeof (mem);
  if (aio_write (&a) != 0)
    {
      puts ("aio_write failed");
      return 1;
    }

  if (pthread_create (&th, NULL, tf, &a) != 0)
    {
      puts ("2nd create failed");
      return 1;
    }

  puts ("going to cancel early");
  if (pthread_cancel (th) != 0)
    {
      puts ("2nd cancel failed");
      return 1;
    }

  r = pthread_barrier_wait (&b);
  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("barrier_wait failed");
      exit (1);
    }

  if (pthread_join (th, &status) != 0)
    {
      puts ("2nd join failed");
      return 1;
    }
  if (status != PTHREAD_CANCELED)
    {
      puts ("2nd thread not canceled");
      return 1;
    }

  if (cl_called == 0)
    {
      printf ("cleanup handler not called\n");
      return 1;
    }
  if (cl_called > 1)
    {
      printf ("cleanup handler called more than once\n");
      return 1;
    }

  puts ("early cancellation succeeded");

  return 0;
}

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