summaryrefslogtreecommitdiff
path: root/tests/mutex6.c
blob: dc14c468389970948174fa5af7b5fb8f9367e2a3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
/* 
 * mutex6.c
 *
 *
 * Pthreads-win32 - POSIX Threads Library for Win32
 * Copyright (C) 1998 Ben Elliston and Ross Johnson
 * Copyright (C) 1999,2000,2001 Ross Johnson
 *
 * Contact Email: rpj@ise.canberra.edu.au
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * --------------------------------------------------------------------------
 *
 * Test the default (type not set) mutex type.
 * Should be the same as PTHREAD_MUTEX_NORMAL.
 * Thread locks mutex twice (recursive lock).
 * Locking thread should deadlock on second attempt.
 *
 * Depends on API functions: 
 *	pthread_mutex_lock()
 *	pthread_mutex_trylock()
 *	pthread_mutex_unlock()
 */

#include "test.h"

static int lockCount = 0;

static pthread_mutex_t mutex;

void * locker(void * arg)
{
  assert(pthread_mutex_lock(&mutex) == 0);
  lockCount++;

  /* Should wait here (deadlocked) */
  assert(pthread_mutex_lock(&mutex) == 0);
  lockCount++;
  assert(pthread_mutex_unlock(&mutex) == 0);

  return 0;
}
 
int
main()
{
  pthread_t t;

  assert(pthread_mutex_init(&mutex, NULL) == 0);

  assert(pthread_create(&t, NULL, locker, NULL) == 0);

  Sleep(1000);

  assert(lockCount == 1);

  /*
   * Should succeed even though we don't own the lock
   * because FAST mutexes don't check ownership.
   */
  assert(pthread_mutex_unlock(&mutex) == 0);

  Sleep (1000);

  assert(lockCount == 2);

  exit(0);

  /* Never reached */
  return 0;
}