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166 lines
3.9 KiB
166 lines
3.9 KiB
/* This file is part of the KDE project
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Copyright (C) 2003 Jaroslaw Staniek <js@iidea.pl>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <kexidb/transaction.h>
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#include <kexidb/connection.h>
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#include <kdebug.h>
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#include <assert.h>
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//remove debug
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#undef KexiDBDbg
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#define KexiDBDbg if (0) kdDebug()
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using namespace KexiDB;
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//helper for debugging
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KEXI_DB_EXPORT int Transaction::globalcount = 0;
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KEXI_DB_EXPORT int Transaction::globalCount() { return Transaction::globalcount; }
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KEXI_DB_EXPORT int TransactionData::globalcount = 0;
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KEXI_DB_EXPORT int TransactionData::globalCount() { return TransactionData::globalcount; }
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TransactionData::TransactionData(Connection *conn)
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: m_conn(conn)
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, m_active(true)
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, refcount(1)
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{
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assert(conn);
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Transaction::globalcount++; //because refcount(1) init.
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TransactionData::globalcount++;
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KexiDBDbg << "-- TransactionData::globalcount == " << TransactionData::globalcount << endl;
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}
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TransactionData::~TransactionData()
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{
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TransactionData::globalcount--;
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KexiDBDbg << "-- TransactionData::globalcount == " << TransactionData::globalcount << endl;
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}
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//---------------------------------------------------
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const Transaction Transaction::null;
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Transaction::Transaction()
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: TQObject(0,"kexidb_transaction")
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, m_data(0)
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{
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}
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Transaction::Transaction( const Transaction& trans )
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: TQObject(0,"kexidb_transaction")
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, m_data(trans.m_data)
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{
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if (m_data) {
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m_data->refcount++;
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Transaction::globalcount++;
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}
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}
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Transaction::~Transaction()
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{
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if (m_data) {
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m_data->refcount--;
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Transaction::globalcount--;
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KexiDBDbg << "~Transaction(): m_data->refcount==" << m_data->refcount << endl;
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if (m_data->refcount==0)
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delete m_data;
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}
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else {
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KexiDBDbg << "~Transaction(): null" << endl;
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}
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KexiDBDbg << "-- Transaction::globalcount == " << Transaction::globalcount << endl;
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}
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Transaction& Transaction::operator=(const Transaction& trans)
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{
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if (m_data) {
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m_data->refcount--;
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Transaction::globalcount--;
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KexiDBDbg << "Transaction::operator=: m_data->refcount==" << m_data->refcount << endl;
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if (m_data->refcount==0)
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delete m_data;
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}
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m_data = trans.m_data;
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if (m_data) {
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m_data->refcount++;
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Transaction::globalcount++;
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}
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return *this;
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}
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bool Transaction::operator==(const Transaction& trans) const
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{
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return m_data==trans.m_data;
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}
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Connection* Transaction::connection() const
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{
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return m_data ? m_data->m_conn : 0;
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}
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bool Transaction::active() const
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{
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return m_data && m_data->m_active;
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}
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bool Transaction::isNull() const
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{
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return m_data==0;
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}
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//---------------------------------------------------
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TransactionGuard::TransactionGuard( Connection& conn )
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: m_trans( conn.beginTransaction() )
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, m_doNothing(false)
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{
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}
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TransactionGuard::TransactionGuard( const Transaction& trans )
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: m_trans(trans)
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, m_doNothing(false)
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{
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}
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TransactionGuard::TransactionGuard()
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: m_doNothing(false)
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{
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}
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TransactionGuard::~TransactionGuard()
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{
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if (!m_doNothing && m_trans.active() && m_trans.connection())
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m_trans.connection()->rollbackTransaction(m_trans);
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}
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bool TransactionGuard::commit()
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{
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if (m_trans.active() && m_trans.connection()) {
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return m_trans.connection()->commitTransaction(m_trans);
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}
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return false;
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}
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void TransactionGuard::doNothing()
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{
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m_doNothing = true;
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}
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