KDb

KDbTransactionData.h
1/* This file is part of the KDE project
2 Copyright (C) 2003-2017 Jarosław Staniek <staniek@kde.org>
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public
6 License as published by the Free Software Foundation; either
7 version 2 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public License
15 along with this program; see the file COPYING. If not, write to
16 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18*/
19
20#ifndef KDB_TRANSACTIONDATA_H
21#define KDB_TRANSACTIONDATA_H
22
23#include "config-kdb.h"
24#include "kdb_export.h"
25
26#include <QtGlobal>
27
28class KDbConnection;
29
30/**
31 * @brief Internal prototype for storing transaction handle for KDbTransaction object
32 *
33 * Only for driver developers. Teimplement this class for database driver that supports transactions.
34 */
35class KDB_EXPORT KDbTransactionData
36{
37public:
38 explicit KDbTransactionData(KDbConnection *connection);
39
41
42 //! Increments the value of reference counter for this data.
43 void ref();
44
45 //! Decrements the value of reference counter for this data.
46 void deref();
47
48 //! @return value of reference counter for this data.
49 int refcount() const;
50
51 //! @return "active" flag of this data
52 bool isActive() const;
53
54 //! Sets "active" flag of this data
55 void setActive(bool set);
56
57 //! @return connection for this data
58 KDbConnection *connection();
59
60 //! @overload
61 //! @since 3.1
62 const KDbConnection *connection() const;
63
64#ifdef KDB_TRANSACTIONS_DEBUG
65 //! Helper for debugging, returns value of global transaction data reference counter
66 static int globalCount();
67#endif
68
69private:
70 Q_DISABLE_COPY(KDbTransactionData)
71 class Private;
72 Private * const d;
73};
74
75#endif
Provides database connection, allowing queries and data modification.
Internal prototype for storing transaction handle for KDbTransaction object.
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