1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2021-2023 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program 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
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#include <unistd.h>
19#include <pthread.h>
20#include <assert.h>
21
22#define NUM_THREADS 4
23
24static pthread_barrier_t barrier;
25
26static void *
27thread_function (void *arg)
28{
29  pthread_barrier_wait (&barrier);
30
31  for (int i = 0; i < 30; i++)
32    sleep (1);
33
34  return NULL;
35}
36
37static void
38all_threads_started (void)
39{}
40
41int
42main (void)
43{
44  pthread_t threads[NUM_THREADS];
45
46  pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1);
47
48  for (int i = 0; i < NUM_THREADS; i++)
49    {
50      int res = pthread_create (&threads[i], NULL, thread_function, NULL);
51      assert (res == 0);
52    }
53
54  pthread_barrier_wait (&barrier);
55  all_threads_started ();
56
57  for (int i = 0; i < NUM_THREADS; i++)
58    {
59      int res = pthread_join (threads[i], NULL);
60      assert (res == 0);
61    }
62
63  return 0;
64}
65
66