1  /* Copyright (C) 2002-2023 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 <pthread.h>
      19  #include <signal.h>
      20  #include <stdio.h>
      21  #include <stdlib.h>
      22  #include <unistd.h>
      23  
      24  
      25  static int do_test (void);
      26  
      27  #define TEST_FUNCTION do_test ()
      28  #include "../test-skeleton.c"
      29  
      30  static void *tf (void *a)
      31  {
      32    puts ("start tf");
      33  
      34    /* Multiple locking, implicitly or explicitly, must be possible.  */
      35    flockfile (stdout);
      36  
      37    puts ("after first flockfile");
      38  
      39    flockfile (stdout);
      40  
      41    puts ("foo");
      42  
      43    funlockfile (stdout);
      44  
      45    puts ("after first funlockfile");
      46  
      47    funlockfile (stdout);
      48  
      49    puts ("all done");
      50  
      51    return a;
      52  }
      53  
      54  
      55  int
      56  do_test (void)
      57  {
      58    pthread_t th;
      59  
      60    if (pthread_create (&th, NULL, tf, NULL) != 0)
      61      {
      62        write_message ("create failed\n");
      63        _exit (1);
      64      }
      65  
      66    void *result;
      67    if (pthread_join (th, &result) != 0)
      68      {
      69        puts ("join failed");
      70        exit (1);
      71      }
      72    else if (result != NULL)
      73      {
      74        printf ("wrong return value: %p, expected %p\n", result, NULL);
      75        exit (1);
      76      }
      77  
      78    puts ("join returned succsefully");
      79  
      80    return 0;
      81  }