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8b923272 JB |
1 | /* A small multi-threaded test case. |
2 | ||
6aba47ca | 3 | Copyright 2004, 2007 Free Software Foundation, Inc. |
8b923272 JB |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include <pthread.h> | |
23 | #include <stdio.h> | |
24 | #include <time.h> | |
25 | ||
26 | void | |
27 | cond_wait (pthread_cond_t *cond, pthread_mutex_t *mut) | |
28 | { | |
29 | pthread_mutex_lock(mut); | |
30 | pthread_cond_wait (cond, mut); | |
31 | pthread_mutex_unlock (mut); | |
32 | } | |
33 | ||
34 | void | |
35 | noreturn (void) | |
36 | { | |
37 | pthread_mutex_t mut; | |
38 | pthread_cond_t cond; | |
39 | ||
40 | pthread_mutex_init (&mut, NULL); | |
41 | pthread_cond_init (&cond, NULL); | |
42 | ||
43 | /* Wait for a condition that will never be signaled, so we effectively | |
44 | block the thread here. */ | |
45 | cond_wait (&cond, &mut); | |
46 | } | |
47 | ||
48 | void * | |
49 | forever_pthread (void *unused) | |
50 | { | |
51 | noreturn (); | |
52 | } | |
53 | ||
54 | void | |
55 | break_me (void) | |
56 | { | |
57 | /* Just an anchor to help putting a breakpoint. */ | |
58 | } | |
59 | ||
60 | int | |
61 | main (void) | |
62 | { | |
63 | pthread_t forever; | |
64 | const struct timespec ts = { 0, 10000000 }; /* 0.01 sec */ | |
65 | ||
66 | pthread_create (&forever, NULL, forever_pthread, NULL); | |
67 | for (;;) | |
68 | { | |
69 | nanosleep (&ts, NULL); | |
70 | break_me(); | |
71 | } | |
72 | ||
73 | return 0; | |
74 | } | |
75 |