C++ QDBusConnectionPrivate类代码示例

/*!
    \since 4.8

    Opens a peer-to-peer connection on address \a address and associate with it the
    connection name \a name. Returns a QDBusConnection object associated with that connection.
*/
QDBusConnection QDBusConnection::connectToPeer(const QString &address,
                                               const QString &name)
{
//    Q_ASSERT_X(QCoreApplication::instance(), "QDBusConnection::addConnection",
//               "Cannot create connection without a Q[Core]Application instance");
    if (!qdbus_loadLibDBus()) {
        QDBusConnectionPrivate *d = 0;
        return QDBusConnection(d);
    }

    QMutexLocker locker(&_q_manager()->mutex);

    QDBusConnectionPrivate *d = _q_manager()->connection(name);
    if (d || name.isEmpty())
        return QDBusConnection(d);

    d = new QDBusConnectionPrivate;
    // setPeer does the error handling for us
    QDBusErrorInternal error;
    DBusConnection *c = q_dbus_connection_open_private(address.toUtf8().constData(), error);

    d->setPeer(c, error);
    _q_manager()->setConnection(name, d);

    QDBusConnection retval(d);

    return retval;
}

/*!
    \internal
    Catch signal disconnections.
*/
void QDBusAbstractInterface::disconnectNotify(const QMetaMethod &signal)
{
    // someone disconnecting from one of our signals
    Q_D(QDBusAbstractInterface);
    if (!d->isValid)
        return;

    QDBusConnectionPrivate *conn = d->connectionPrivate();
    if (conn && signal.isValid() && !isSignalConnected(signal))
        return conn->disconnectRelay(d->service, d->path, d->interface,
                                     this, signal);
    if (!conn)
        return;

    // wildcard disconnecting, we need to figure out which of our signals are
    // no longer connected to anything
    const QMetaObject *mo = metaObject();
    int midx = QObject::staticMetaObject.methodCount();
    const int end = mo->methodCount();
    for ( ; midx < end; ++midx) {
        QMetaMethod mm = mo->method(midx);
        if (mm.methodType() == QMetaMethod::Signal && !isSignalConnected(mm))
            conn->disconnectRelay(d->service, d->path, d->interface, this, mm);
    }
}

QDBusConnection QDBusConnection::addConnection(BusType type, const QString &name)
{
//    Q_ASSERT_X(QCoreApplication::instance(), "QDBusConnection::addConnection",
//               "Cannot create connection without a Q[Core]Application instance");

    QDBusConnectionPrivate *d = manager()->connection(name);
    if (d)
        return QDBusConnection(name);

    d = new QDBusConnectionPrivate;
    DBusConnection *c = 0;
    switch (type) {
        case SystemBus:
            c = dbus_bus_get(DBUS_BUS_SYSTEM, &d->error);
            break;
        case SessionBus:
            c = dbus_bus_get(DBUS_BUS_SESSION, &d->error);
            break;
        case ActivationBus:
            c = dbus_bus_get(DBUS_BUS_STARTER, &d->error);
            break;
    }
    d->setConnection(c); //setConnection does the error handling for us

    manager()->setConnection(name, d);

    return QDBusConnection(name);
}

/*!
    \internal
    Catch signal disconnections.
*/
void QDBusAbstractInterface::disconnectNotify(const char *signal)
{
    // someone disconnecting from one of our signals
    Q_D(QDBusAbstractInterface);

    QDBusConnectionPrivate *conn = d->connectionPrivate();
    if (conn)
        conn->disconnectRelay(d->service, d->currentOwner, d->path, d->interface,
                              this, signal);
}

QDBusConnectionManager::~QDBusConnectionManager()
{
    for (QHash<QString, QDBusConnectionPrivate *>::const_iterator it = connectionHash.constBegin();
         it != connectionHash.constEnd(); ++it) {
        QDBusConnectionPrivate *d = it.value();
        if (!d->ref.deref())
            d->deleteYourself();
        else
            d->closeConnection();
    }
    connectionHash.clear();
}

void QDBusConnectionManager::removeConnection(const QString &name)
{
    QDBusConnectionPrivate *d = 0;
    d = connectionHash.take(name);
    if (d && !d->ref.deref())
        d->deleteYourself();

    // Static objects may be keeping the connection open.
    // However, it is harmless to have outstanding references to a connection that is
    // closing as long as those references will be soon dropped without being used.

    // ### Output a warning if connections are being used after they have been removed.
}

/*!
    \internal
    Catch signal connections.
*/
void QDBusAbstractInterface::connectNotify(const char *signal)
{
    // someone connecting to one of our signals
    Q_D(QDBusAbstractInterface);
    if (!d->isValid)
        return;

    // we end up recursing here, so optimize away
    if (qstrcmp(signal + 1, "destroyed(QObject*)") == 0)
        return;

    QDBusConnectionPrivate *conn = d->connectionPrivate();
    if (conn) {
        conn->connectRelay(d->service, d->path, d->interface,
                           this, signal);
    }
}

void QDBusConnectionManager::bindToApplication()
{
    if (default_connection) {
        default_connection->bindToApplication();
    }
/* FIXME-QT4
    for (QHash<QString, QDBusConnectionPrivate *>::const_iterator it = connectionHash.constBegin();
         it != connectionHash.constEnd(); ++it) {
             (*it)->bindToApplication();
    }*/
    for (ConnectionHash::ConstIterator it = connectionHash.begin();
         it != connectionHash.end(); ++it)
    {
        it.data()->bindToApplication();
    }
}