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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtAddOn.JsonDb module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QDebug>
#include "qbtree.h"
#include "qbtreetxn.h"
#include "qbtreelocker.h"
QBtreeReadLocker::QBtreeReadLocker(QBtree *db)
: mTxn(db ? db->begin(QBtree::TxnReadOnly) : 0)
{
if (!db)
qWarning("QBtreeReadLocker: constructed without QBtree object!");
if (db && !mTxn) {
qWarning() << "QBtreeReadLocker: hm, failed to start read transaction on" << db->fileName();
Q_ASSERT(false);
}
}
QBtreeReadLocker::~QBtreeReadLocker()
{
abort();
}
void QBtreeReadLocker::abort()
{
if (mTxn)
mTxn->abort();
mTxn = 0;
}
quint32 QBtreeReadLocker::tag() const
{
return mTxn ? mTxn->tag() : quint32(0);
}
bool QBtreeReadLocker::get(const QByteArray &baKey, QByteArray *baValue) const
{
return mTxn ? mTxn->get(baKey, baValue) : false;
}
bool QBtreeReadLocker::get(const char *key, int keySize, QBtreeData *value) const
{
return mTxn ? mTxn->get(key, keySize, value) : false;
}
bool QBtreeReadLocker::get(const QBtreeData &key, QBtreeData *value) const
{
return mTxn ? mTxn->get(key, value) : false;
}
class QBtreeWriteLockerPrivate
{
public:
QBtreeTxn *txn;
quint32 autoCommitTag;
int isAutoCommitSet : 1;
QBtreeWriteLockerPrivate()
: txn(0), autoCommitTag(0), isAutoCommitSet(false)
{ }
};
QBtreeWriteLocker::QBtreeWriteLocker(QBtree *db)
: d_ptr(new QBtreeWriteLockerPrivate)
{
if (!db)
qWarning("QBtreeWriteLocker: constructed without QBtree object!");
d_ptr->txn = db ? db->begin(QBtree::TxnReadWrite) : 0;
}
QBtreeWriteLocker::~QBtreeWriteLocker()
{
if (d_ptr->isAutoCommitSet)
commit(d_ptr->autoCommitTag);
else
abort();
delete d_ptr;
}
bool QBtreeWriteLocker::isValid() const
{
return d_ptr->txn != 0;
}
void QBtreeWriteLocker::abort()
{
if (d_ptr->txn)
d_ptr->txn->abort();
d_ptr->txn = 0;
}
bool QBtreeWriteLocker::commit(quint32 tag)
{
if (!d_ptr->txn)
return false;
QBtreeTxn *txn = d_ptr->txn;
d_ptr->txn = 0;
return txn->commit(tag);
}
quint32 QBtreeWriteLocker::tag() const
{
return d_ptr->txn ? d_ptr->txn->tag() : quint32(0);
}
void QBtreeWriteLocker::setAutoCommitTag(quint32 tag)
{
d_ptr->autoCommitTag = tag;
d_ptr->isAutoCommitSet = true;
}
quint32 QBtreeWriteLocker::autoCommitTag() const
{
return d_ptr->autoCommitTag;
}
void QBtreeWriteLocker::unsetAutoCommitTag()
{
d_ptr->isAutoCommitSet = false;
}
bool QBtreeWriteLocker::get(const QByteArray &baKey, QByteArray *baValue) const
{
return d_ptr->txn ? d_ptr->txn->get(baKey, baValue) : false;
}
bool QBtreeWriteLocker::get(const char *key, int keySize, QBtreeData *value) const
{
return d_ptr->txn ? d_ptr->txn->get(key, keySize, value) : false;
}
bool QBtreeWriteLocker::get(const QBtreeData &key, QBtreeData *value) const
{
return d_ptr->txn ? d_ptr->txn->get(key, value) : false;
}
bool QBtreeWriteLocker::put(const QByteArray &baKey, const QByteArray &baValue)
{
return d_ptr->txn ? d_ptr->txn->put(baKey, baValue) : false;
}
bool QBtreeWriteLocker::put(const char *key, int keySize, const char *value, int valueSize)
{
return d_ptr->txn ? d_ptr->txn->put(key, keySize, value, valueSize) : false;
}
bool QBtreeWriteLocker::put(const QBtreeData &baKey, const QBtreeData &baValue)
{
return d_ptr->txn ? d_ptr->txn->put(baKey, baValue) : false;
}
bool QBtreeWriteLocker::remove(const QByteArray &baKey)
{
return d_ptr->txn ? d_ptr->txn->remove(baKey) : false;
}
bool QBtreeWriteLocker::remove(const QBtreeData &key)
{
return d_ptr->txn ? d_ptr->txn->remove(key) : false;
}
bool QBtreeWriteLocker::remove(const char *key, int keySize)
{
return d_ptr->txn ? d_ptr->txn->remove(key, keySize) : false;
}
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