1  /* Copyright (C) 2003-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <fcntl.h>
      19  #include <pthread.h>
      20  #include <stdio.h>
      21  #include <stdlib.h>
      22  #include <string.h>
      23  #include <unistd.h>
      24  
      25  
      26  static pthread_barrier_t b;
      27  
      28  
      29  static void
      30  cleanup (void *arg)
      31  {
      32    fputs ("in cleanup\n", stdout);
      33  }
      34  
      35  
      36  static void *
      37  tf (void *arg)
      38  {
      39    int fd = open ("/dev/null", O_RDWR);
      40    if (fd == -1)
      41      {
      42        puts ("cannot open /dev/null");
      43        exit (1);
      44      }
      45    FILE *fp = fdopen (fd, "w");
      46    if (fp == NULL)
      47      {
      48        puts ("fdopen failed");
      49        exit (1);
      50      }
      51  
      52    pthread_cleanup_push (cleanup, NULL);
      53  
      54    int e = pthread_barrier_wait (&b);
      55    if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
      56      {
      57        puts ("barrier_wait failed");
      58        exit (1);
      59      }
      60  
      61    while (1)
      62      /* fprintf() uses write() which is a cancallation point.  */
      63      fprintf (fp, "foo");
      64  
      65    pthread_cleanup_pop (0);
      66  
      67    return NULL;
      68  }
      69  
      70  
      71  static int
      72  do_test (void)
      73  {
      74    if (pthread_barrier_init (&b, NULL, 2) != 0)
      75      {
      76        puts ("barrier_init failed");
      77        exit (1);
      78      }
      79  
      80    pthread_t th;
      81    if (pthread_create (&th, NULL, tf, NULL) != 0)
      82      {
      83        puts ("create failed");
      84        return 1;
      85      }
      86  
      87    int e = pthread_barrier_wait (&b);
      88    if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
      89      {
      90        puts ("barrier_wait failed");
      91        exit (1);
      92      }
      93  
      94    sleep (1);
      95  
      96    puts ("cancel now");
      97  
      98    if (pthread_cancel (th) != 0)
      99      {
     100        puts ("cancel failed");
     101        exit (1);
     102      }
     103  
     104    puts ("waiting for the child");
     105  
     106    void *r;
     107    if (pthread_join (th, &r) != 0)
     108      {
     109        puts ("join failed");
     110        exit (1);
     111      }
     112  
     113    if (r != PTHREAD_CANCELED)
     114      {
     115        puts ("thread wasn't canceled");
     116        exit (1);
     117      }
     118  
     119    return 0;
     120  }
     121  
     122  
     123  #define TEST_FUNCTION do_test ()
     124  #include "../test-skeleton.c"