1 /*
2 * mutex3r.c
3 *
4 *
5 * --------------------------------------------------------------------------
6 *
7 * Pthreads-win32 - POSIX Threads Library for Win32
8 * Copyright(C) 1998 John E. Bossom
9 * Copyright(C) 1999,2005 Pthreads-win32 contributors
10 *
11 * Contact Email: rpj@callisto.canberra.edu.au
12 *
13 * The current list of contributors is contained
14 * in the file CONTRIBUTORS included with the source
15 * code distribution. The list can also be seen at the
16 * following World Wide Web location:
17 * http://sources.redhat.com/pthreads-win32/contributors.html
18 *
19 * This library is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU Lesser General Public
21 * License as published by the Free Software Foundation; either
22 * version 2 of the License, or (at your option) any later version.
23 *
24 * This library is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * Lesser General Public License for more details.
28 *
29 * You should have received a copy of the GNU Lesser General Public
30 * License along with this library in the file COPYING.LIB;
31 * if not, write to the Free Software Foundation, Inc.,
32 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
33 *
34 * --------------------------------------------------------------------------
35 *
36 * Declare a static mutex object, lock it, trylock it,
37 * and then unlock it again.
38 *
39 * Depends on API functions:
40 * pthread_mutex_lock()
41 * pthread_mutex_trylock()
42 * pthread_mutex_unlock()
43 */
44
45 #include "test.h"
46
47 pthread_mutex_t mutex1 = PTHREAD_RECURSIVE_MUTEX_INITIALIZER;
48
49 static int washere = 0;
50
func(void * arg)51 void * func(void * arg)
52 {
53 assert(pthread_mutex_trylock(&mutex1) == EBUSY);
54
55 washere = 1;
56
57 return 0;
58 }
59
60 int
main()61 main()
62 {
63 pthread_t t;
64
65 assert(pthread_mutex_lock(&mutex1) == 0);
66
67 assert(pthread_create(&t, NULL, func, NULL) == 0);
68 assert(pthread_join(t, NULL) == 0);
69
70 assert(pthread_mutex_unlock(&mutex1) == 0);
71
72 assert(washere == 1);
73
74 return 0;
75 }
76