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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtAddOn.JsonDb module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QKEYVALUESTORE_P_H
#define QKEYVALUESTORE_P_H
#include <QString>
#include <QByteArray>
#include <QHash>
#include <QFile>
#include <QMap>
#include <QQueue>
#include <QDebug>
#include "qkeyvaluestoreentry.h"
#include "qkeyvaluestoretxn.h"
#include "qkeyvaluestorefile.h"
class QKeyValueStore;
class QKeyValueStoreTxn;
class QKeyValueStorePrivate {
public:
QKeyValueStorePrivate(QKeyValueStore *parent, const QString &name);
~QKeyValueStorePrivate();
// Public API Mirror
int open();
int close();
bool sync();
bool compact();
QKeyValueStoreTxn *beginRead();
QKeyValueStoreTxn *beginWrite();
bool isWriting() const;
QKeyValueStoreTxn *writeTransaction();
// This is for write transactions to report back.
void addEntry(QKeyValueStoreEntry *entry);
void reportReadyWrite();
void reportReadyRead();
// Internals
QKeyValueStore *m_parent;
QString m_name;
QKeyValueStoreTxn *m_writeTransaction;
QKeyValueStoreFile *m_file;
quint32 m_currentTag;
bool m_autoSync;
bool m_runCompaction;
bool m_needCompaction;
quint32 m_compactThreshold;
quint32 m_compactableOperations;
enum QKeyValueStoreState { Closed, Ready, DataToSync, RebuildBTree, Error = 0xFFFF };
QKeyValueStoreState m_state;
quint32 m_pendingBytes;
quint32 m_syncThreshold;
quint32 m_marker;
quint32 m_ongoingReadTransactions;
quint32 m_ongoingWriteTransactions;
QMap<quint64, qint64> m_dataMarks;
QMap<QByteArray, qint64> m_offsets;
// Internal methods, should not be called from the public class!!!
void syncToDisk();
void syncTree(quint64 timestamp);
int rebuildBTree();
quint64 checkFileContents();
quint64 checkTreeContents();
};
#endif // QKEYVALUESTORE_P_H
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