1/* This test program is part of GDB, The GNU debugger.
2
3   Copyright 2004, 2007 Free Software Foundation, Inc.
4
5   Originally written by Jeff Johnston <jjohnstn@redhat.com>,
6   contributed by Red Hat
7
8   This file is part of GDB.
9
10   This program is free software; you can redistribute it and/or modify
11   it under the terms of the GNU General Public License as published by
12   the Free Software Foundation; either version 3 of the License, or
13   (at your option) any later version.
14
15   This program is distributed in the hope that it will be useful,
16   but WITHOUT ANY WARRANTY; without even the implied warranty of
17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18   GNU General Public License for more details.
19
20   You should have received a copy of the GNU General Public License
21   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
22
23#include <pthread.h>
24#include <semaphore.h>
25#include <stdio.h>
26#include <limits.h>
27#include <errno.h>
28
29sem_t semaphore;
30
31void *
32thread_function (void *arg)
33{
34  printf ("Thread executing\n");
35  while (sem_wait (&semaphore) != 0)
36    {
37      if (errno != EINTR)
38	{
39	  perror ("thread_function");
40	  return;
41	}
42    }
43  return NULL;
44}
45
46int
47main (int argc, char **argv)
48{
49  pthread_attr_t attr;
50
51  pthread_attr_init (&attr);
52  pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN);
53
54  if (sem_init (&semaphore, 0, 0) == -1)
55    {
56      perror ("semaphore");
57      return -1;
58    }
59
60
61  /* Create a thread, wait for it to complete.  */
62  {
63    pthread_t thread;
64    pthread_create (&thread, &attr, thread_function, NULL);
65    sem_post (&semaphore);
66    pthread_join (thread, NULL);
67  }
68
69  pthread_attr_destroy (&attr);
70  return 0;
71}
72