1 /*
2 * mutex6n.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 * Tests PTHREAD_MUTEX_NORMAL mutex type.
37 * Thread locks mutex twice (recursive lock).
38 * The thread should deadlock.
39 *
40 * Depends on API functions:
41 * pthread_create()
42 * pthread_mutexattr_init()
43 * pthread_mutexattr_settype()
44 * pthread_mutexattr_gettype()
45 * pthread_mutex_init()
46 * pthread_mutex_lock()
47 * pthread_mutex_unlock()
48 */
49
50 #include "test.h"
51
52 static int lockCount = 0;
53
54 static pthread_mutex_t mutex;
55 static pthread_mutexattr_t mxAttr;
56
locker(void * arg)57 void * locker(void * arg)
58 {
59 assert(pthread_mutex_lock(&mutex) == 0);
60 lockCount++;
61
62 /* Should wait here (deadlocked) */
63 assert(pthread_mutex_lock(&mutex) == 0);
64 lockCount++;
65 assert(pthread_mutex_unlock(&mutex) == 0);
66
67 return (void *) 555;
68 }
69
70 int
main()71 main()
72 {
73 pthread_t t;
74 int mxType = -1;
75
76 assert(pthread_mutexattr_init(&mxAttr) == 0);
77 assert(pthread_mutexattr_settype(&mxAttr, PTHREAD_MUTEX_NORMAL) == 0);
78 assert(pthread_mutexattr_gettype(&mxAttr, &mxType) == 0);
79 assert(mxType == PTHREAD_MUTEX_NORMAL);
80
81 assert(pthread_mutex_init(&mutex, &mxAttr) == 0);
82
83 assert(pthread_create(&t, NULL, locker, NULL) == 0);
84
85 Sleep(1000);
86
87 assert(lockCount == 1);
88
89 /*
90 * Should succeed even though we don't own the lock
91 * because FAST mutexes don't check ownership.
92 */
93 assert(pthread_mutex_unlock(&mutex) == 0);
94
95 Sleep (1000);
96
97 assert(lockCount == 2);
98
99 exit(0);
100
101 /* Never reached */
102 return 0;
103 }
104
105