htl/tests/test-2.c

   1 /* Test detachability.
   2    Copyright (C) 2000-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library;  if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #define _GNU_SOURCE
  20
  21 #include <pthread.h>
  22 #include <assert.h>
  23 #include <error.h>
  24 #include <errno.h>
  25 #include <unistd.h>
  26
  27 void *
  28 thread (void *arg)
  29 {
  30   while (1)
  31     sched_yield ();
  32 }
  33
  34 int
  35 main (int argc, char **argv)
  36 {
  37   int err;
  38   pthread_t tid;
  39   void *ret;
  40
  41   err = pthread_create (&tid, 0, thread, 0);
  42   if (err)
  43     error (1, err, "pthread_create");
  44
  45   err = pthread_detach (tid);
  46   if (err)
  47     error (1, err, "pthread_detach");
  48
  49   err = pthread_detach (tid);
  50   assert (err == EINVAL);
  51
  52   err = pthread_join (tid, &ret);
  53   assert (err == EINVAL);
  54
  55   return 0;
  56 }