1 /* A small multi-threaded test case.
2
3 Copyright 2004
4 Free Software Foundation, Inc.
5
6 This file is part of GDB.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23 #include <pthread.h>
24 #include <stdio.h>
25 #include <time.h>
26
27 void
cond_wait(pthread_cond_t * cond,pthread_mutex_t * mut)28 cond_wait (pthread_cond_t *cond, pthread_mutex_t *mut)
29 {
30 pthread_mutex_lock(mut);
31 pthread_cond_wait (cond, mut);
32 pthread_mutex_unlock (mut);
33 }
34
35 void
noreturn(void)36 noreturn (void)
37 {
38 pthread_mutex_t mut;
39 pthread_cond_t cond;
40
41 pthread_mutex_init (&mut, NULL);
42 pthread_cond_init (&cond, NULL);
43
44 /* Wait for a condition that will never be signaled, so we effectively
45 block the thread here. */
46 cond_wait (&cond, &mut);
47 }
48
49 void *
forever_pthread(void * unused)50 forever_pthread (void *unused)
51 {
52 noreturn ();
53 }
54
55 void
break_me(void)56 break_me (void)
57 {
58 /* Just an anchor to help putting a breakpoint. */
59 }
60
61 int
main(void)62 main (void)
63 {
64 pthread_t forever;
65 const struct timespec ts = { 0, 10000000 }; /* 0.01 sec */
66
67 pthread_create (&forever, NULL, forever_pthread, NULL);
68 for (;;)
69 {
70 nanosleep (&ts, NULL);
71 break_me();
72 }
73
74 return 0;
75 }
76
77