inline uint qHash(const QFileInfo &tag)
{
    return qHash(tag.fileName());
}

namespace {
QString threadAwareConnectionName(QString connectionNamePrefix)
{
    auto data = QThread::currentThreadId();
    return QString("%1.%2")
        .arg(connectionNamePrefix)
        .arg(QLatin1String(
            QByteArray(reinterpret_cast<char *>(&data), sizeof(data)).toHex().data()));
}

} // namespace

QSqlDatabase DataSource::connection()
{
    QString connectionName = threadAwareConnectionName(m_connectionName);
    QSqlDatabase connection = QSqlDatabase::database(connectionName);
    if (!connection.isValid()) {
        qCDebug(dataSource()) << "Initializing connection" << connectionName;
        connection = QSqlDatabase::addDatabase(m_driver, connectionName);
        if (!m_databaseName.isEmpty())
            connection.setDatabaseName(m_databaseName);
        if (!m_hostName.isEmpty())
            connection.setHostName(m_hostName);
        if (!m_port)
            connection.setPort(m_port);
        if (!m_userName.isEmpty())
            connection.setUserName(m_userName);
        if (!m_password.isEmpty())
            connection.setPassword(m_password);
        if (!m_connectionOptions.isEmpty())
            connection.setConnectOptions(m_connectionOptions);
        if (!connection.open()) {
            qCWarning(dataSource) << "Cannot open connection: " << connection.lastError();
            return connection;
        }
        prepare(connection);
    }
    return connection;
}