/*
Copyright (C) 2012, University of Cambridge, Department of Psychiatry.
Created by Rudolf Cardinal (rnc1001@cam.ac.uk).
This file is part of CamCOPS.
CamCOPS is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
CamCOPS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with CamCOPS. If not, see <https://www.gnu.org/licenses/>.
*/
#include "dbnestabletransaction.h"
#include <QDebug>
#include "db/databasemanager.h"
int DbNestableTransaction::s_count = 0;
int DbNestableTransaction::s_level = 0;
DbNestableTransaction::DbNestableTransaction(DatabaseManager& db) :
m_db(db),
m_fail(false)
{
++s_count;
if (s_count < 0) {
// in case we get wraparound after long use
// (don't want "-" in savepoint name)
s_count = 0;
}
++s_level;
m_name = QString("svp_t%1_l%2").arg(s_count).arg(s_level);
m_db.execNoAnswer(QString("SAVEPOINT %1").arg(m_name));
}
DbNestableTransaction::~DbNestableTransaction()
{
if (m_fail) {
m_db.execNoAnswer(QString("ROLLBACK TO SAVEPOINT %1").arg(m_name));
} else {
m_db.execNoAnswer(QString("RELEASE %1").arg(m_name));
}
--s_level;
if (s_level < 0) {
qCritical() << Q_FUNC_INFO << "BUG: s_level < 0; is" << s_level;
s_level = 0;
}
}
void DbNestableTransaction::fail()
{
m_fail = true;
}
void DbNestableTransaction::succeed()
{
m_fail = false;
}