text: /* Copyright 2007-2021 Free Software Foundation, Inc.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program 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 General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include <pthread.h>
  #include <assert.h>
  #include <unistd.h>
  
  static volatile pthread_t main_thread;
  pthread_barrier_t barrier;
  
  static void *
  thread_a (void *arg)
  {
    int i;
  
    return 0; /* break-here */
  }
  
  static void *
  thread_b (void *arg)
  {
    int i;
  
    pthread_barrier_wait (&barrier);
  
    i = pthread_join (main_thread, NULL);
    assert (i == 0);
  
    return arg;
  }
  
  int
  main (void)
  {
    pthread_t thread;
    int i;
  
    /* First test resuming only `thread_a', which exits.  */
    i = pthread_create (&thread, NULL, thread_a, NULL);
    assert (i == 0);
    pthread_join (thread, NULL);
  
    /* Then test resuming only the leader, which also exits.  */
    main_thread = pthread_self ();
  
    pthread_barrier_init (&barrier, NULL, 2);
  
    i = pthread_create (&thread, NULL, thread_b, NULL);
    assert (i == 0);
  
    pthread_barrier_wait (&barrier);
  
    pthread_exit (NULL); /* break-here-2 */
    /* NOTREACHED */
    return 0;
  }
  