blob: 5c261aa66f53e1800a7e300c19fef399cf792986 (
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
|
/****************************************************************************
** $Id$
**
** Definition of QLock class. This manages interprocess locking
**
** Created : 20000406
**
** Copyright (C) 2000-2002 Trolltech AS. All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses for Qt/Embedded may use this file in accordance with the
** Qt Embedded Commercial License Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
** information about Qt Commercial License Agreements.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#ifndef QLOCK_P_H
#define QLOCK_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. This header file may
// change from version to version without notice, or even be
// removed.
//
// We mean it.
//
//
#ifndef QT_H
#include <qstring.h>
#endif // QT_H
class QLockData;
class QLock
{
public:
QLock( const QString &filename, char id, bool create = FALSE );
~QLock();
enum Type { Read, Write };
bool isValid() const;
void lock( Type type );
void unlock();
bool locked() const;
private:
Type type;
QLockData *data;
};
// Nice class for ensuring the lock is released.
// Just create one on the stack and the lock is automatically released
// when QLockHolder is destructed.
class QLockHolder
{
public:
QLockHolder( QLock *l, QLock::Type type ) : qlock(l) {
qlock->lock( type );
}
~QLockHolder() { if ( locked() ) qlock->unlock(); }
void lock( QLock::Type type ) { qlock->lock( type ); }
void unlock() { qlock->unlock(); }
bool locked() const { return qlock->locked(); }
private:
QLock *qlock;
};
#endif
|
