summaryrefslogtreecommitdiff
path: root/tests/mutex7e.c
blob: 95b339c8b9d068bcf9dd538937e95af9e5187279 (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
85
86
87
88
89
90
91
92
93
/* 
 * mutex7e.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
 *
 * --------------------------------------------------------------------------
 *
 * Tests PTHREAD_MUTEX_ERRORCHECK mutex type.
 * Thread locks and then trylocks mutex (attempted recursive lock).
 * Trylock should fail with an EDEADLK error.
 * The second unlock attempt should fail with an EPERM error.
 *
 * Depends on API functions: 
 *      pthread_create()
 *      pthread_join()
 *      pthread_mutexattr_init()
 *      pthread_mutexattr_destroy()
 *      pthread_mutexattr_settype()
 *      pthread_mutexattr_gettype()
 *      pthread_mutex_init()
 *      pthread_mutex_destroy()
 *	pthread_mutex_lock()
 *	pthread_mutex_unlock()
 */

#include "test.h"

static int lockCount = 0;

static pthread_mutex_t mutex;
static pthread_mutexattr_t mxAttr;

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

  return (void *) 555;
}
 
int
main()
{
  pthread_t t;
  int result = 0;
  int mxType = -1;

  assert(pthread_mutexattr_init(&mxAttr) == 0);
  assert(pthread_mutexattr_settype(&mxAttr, PTHREAD_MUTEX_ERRORCHECK) == 0);
  assert(pthread_mutexattr_gettype(&mxAttr, &mxType) == 0);
  assert(mxType == PTHREAD_MUTEX_ERRORCHECK);

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

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

  assert(pthread_join(t, (void **) &result) == 0);
  assert(result == 555);

  assert(lockCount == 2);

  assert(pthread_mutex_destroy(&mutex) == 0);
  assert(pthread_mutexattr_destroy(&mxAttr) == 0);

  exit(0);

  /* Never reached */
  return 0;
}