sysdeps/pthread/tst-stdio2.c

   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 }