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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtDBus module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <qdebug.h>
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#include <qcoreapplication.h>
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#include <qstringlist.h>
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#include "qdbusconnection.h"
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#include "qdbusconnectioninterface.h"
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#include "qdbuserror.h"
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#include "qdbusmessage.h"
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#include "qdbusmessage_p.h"
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#include "qdbusconnection_p.h"
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#include "qdbusinterface_p.h"
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#include "qdbusutil_p.h"
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#include "qdbusthreaddebug_p.h"
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QT_BEGIN_NAMESPACE
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class QDBusConnectionManager
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{
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public:
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QDBusConnectionManager() {}
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~QDBusConnectionManager();
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QDBusConnectionPrivate *connection(const QString &name) const;
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void removeConnection(const QString &name);
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void setConnection(const QString &name, QDBusConnectionPrivate *c);
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QDBusConnectionPrivate *sender() const;
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void setSender(const QDBusConnectionPrivate *s);
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mutable QMutex mutex;
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private:
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QHash<QString, QDBusConnectionPrivate *> connectionHash;
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mutable QMutex senderMutex;
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QString senderName; // internal; will probably change
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};
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Q_GLOBAL_STATIC(QDBusConnectionManager, _q_manager)
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QDBusConnectionPrivate *QDBusConnectionManager::sender() const
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{
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QMutexLocker locker(&senderMutex);
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return connection(senderName);
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}
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void QDBusConnectionManager::setSender(const QDBusConnectionPrivate *s)
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{
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QMutexLocker locker(&senderMutex);
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senderName = (s ? s->name : QString());
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}
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QDBusConnectionPrivate *QDBusConnectionManager::connection(const QString &name) const
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{
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return connectionHash.value(name, 0);
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}
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void QDBusConnectionManager::removeConnection(const QString &name)
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{
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QDBusConnectionPrivate *d = 0;
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d = connectionHash.take(name);
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if (d && !d->ref.deref())
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d->deleteYourself();
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// Static objects may be keeping the connection open.
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// However, it is harmless to have outstanding references to a connection that is
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// closing as long as those references will be soon dropped without being used.
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// ### Output a warning if connections are being used after they have been removed.
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}
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QDBusConnectionManager::~QDBusConnectionManager()
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{
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for (QHash<QString, QDBusConnectionPrivate *>::const_iterator it = connectionHash.constBegin();
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it != connectionHash.constEnd(); ++it) {
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QDBusConnectionPrivate *d = it.value();
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if (!d->ref.deref())
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d->deleteYourself();
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else
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d->closeConnection();
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}
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connectionHash.clear();
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}
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QDBUS_EXPORT void qDBusBindToApplication();
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void qDBusBindToApplication()
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{
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}
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void QDBusConnectionManager::setConnection(const QString &name, QDBusConnectionPrivate *c)
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{
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connectionHash[name] = c;
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c->name = name;
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}
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/*!
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\fn QDBusConnection &QDBusConnection::sessionBus()
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\relates QDBusConnection
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Returns a QDBusConnection object opened with the session bus. The object reference returned
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by this function is valid until the QCoreApplication's destructor is run, when the
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connection will be closed and the object, deleted.
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*/
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/*!
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\fn QDBusConnection &QDBusConnection::systemBus()
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\relates QDBusConnection
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Returns a QDBusConnection object opened with the system bus. The object reference returned
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by this function is valid until the QCoreApplication's destructor is run, when the
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connection will be closed and the object, deleted.
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*/
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/*!
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\class QDBusConnection
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\inmodule QtDBus
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\since 4.2
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\brief The QDBusConnection class represents a connection to the D-Bus bus daemon.
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This class is the initial point in a D-Bus session. Using it, you
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can get access to remote objects, interfaces; connect remote
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signals to your object's slots; register objects, etc.
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D-Bus connections are created using the connectToBus() function,
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which opens a connection to the server daemon and does the initial
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handshaking, associating that connection with a name. Further
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attempts to connect using the same name will return the same
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connection.
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The connection is then torn down using the disconnectFromBus()
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function.
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As a convenience for the two most common connection types, the
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sessionBus() and systemBus() functions return open connections to
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the session server daemon and the system server daemon,
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respectively. Those connections are opened when first used and are
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closed when the QCoreApplication destructor is run.
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D-Bus also supports peer-to-peer connections, without the need for
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a bus server daemon. Using this facility, two applications can
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talk to each other and exchange messages. This can be achieved by
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passing an address to connectToBus() function, which was opened by
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another D-Bus application using QDBusServer.
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*/
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/*!
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\enum QDBusConnection::BusType
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Specifies the type of the bus connection. The valid bus types are:
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\value SessionBus the session bus, associated with the running desktop session
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\value SystemBus the system bus, used to communicate with system-wide processes
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\value ActivationBus the activation bus, the "alias" for the bus that started the
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service
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On the Session Bus, one can find other applications by the same user that are sharing the same
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desktop session (hence the name). On the System Bus, however, processes shared for the whole
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system are usually found.
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*/
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/*!
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\enum QDBusConnection::RegisterOption
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Specifies the options for registering objects with the connection. The possible values are:
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\value ExportAdaptors export the contents of adaptors found in this object
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\value ExportScriptableSlots export this object's scriptable slots
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\value ExportScriptableSignals export this object's scriptable signals
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\value ExportScriptableProperties export this object's scriptable properties
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\value ExportScriptableContents shorthand form for ExportScriptableSlots |
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ExportScriptableSignals |
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ExportScriptableProperties
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\value ExportNonScriptableSlots export this object's non-scriptable slots
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\value ExportNonScriptableSignals export this object's non-scriptable signals
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\value ExportNonScriptableProperties export this object's non-scriptable properties
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\value ExportNonScriptableContents shorthand form for ExportNonScriptableSlots |
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ExportNonScriptableSignals |
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ExportNonScriptableProperties
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\value ExportAllSlots export all of this object's slots
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\value ExportAllSignals export all of this object's signals
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\value ExportAllProperties export all of this object's properties
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\value ExportAllContents export all of this object's contents
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\value ExportChildObjects export this object's child objects
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\sa registerObject(), QDBusAbstractAdaptor, {usingadaptors.html}{Using adaptors}
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*/
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/*!
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\enum QDBusConnection::UnregisterMode
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The mode for unregistering an object path:
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\value UnregisterNode unregister this node only: do not unregister child objects
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\value UnregisterTree unregister this node and all its sub-tree
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Note, however, if this object was registered with the ExportChildObjects option, UnregisterNode
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will unregister the child objects too.
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*/
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/*!
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Creates a QDBusConnection object attached to the connection with name \a name.
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This does not open the connection. You have to call connectToBus() to open it.
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*/
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QDBusConnection::QDBusConnection(const QString &name)
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{
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if (name.isEmpty()) {
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d = 0;
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} else {
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QMutexLocker locker(&_q_manager()->mutex);
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d = _q_manager()->connection(name);
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if (d)
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d->ref.ref();
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}
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}
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/*!
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Creates a copy of the \a other connection.
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*/
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QDBusConnection::QDBusConnection(const QDBusConnection &other)
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{
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d = other.d;
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if (d)
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d->ref.ref();
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}
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/*!
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\internal
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Creates a connection object with the given \a dd as private object.
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*/
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QDBusConnection::QDBusConnection(QDBusConnectionPrivate *dd)
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{
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d = dd;
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if (d)
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d->ref.ref();
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}
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/*!
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Disposes of this object. This does not close the connection: you
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have to call disconnectFromBus() to do that.
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*/
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QDBusConnection::~QDBusConnection()
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{
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if (d && !d->ref.deref())
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d->deleteYourself();
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}
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/*!
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Creates a copy of the connection \a other in this object. Note
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that the connection this object referenced before the copy, is not
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spontaneously disconnected.
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\sa disconnectFromBus()
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*/
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QDBusConnection &QDBusConnection::operator=(const QDBusConnection &other)
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{
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if (other.d)
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other.d->ref.ref();
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if (d && !d->ref.deref())
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d->deleteYourself();
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d = other.d;
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return *this;
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}
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/*!
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Opens a connection of type \a type to one of the known busses and
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associate with it the connection name \a name. Returns a
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QDBusConnection object associated with that connection.
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*/
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QDBusConnection QDBusConnection::connectToBus(BusType type, const QString &name)
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{
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// Q_ASSERT_X(QCoreApplication::instance(), "QDBusConnection::addConnection",
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// "Cannot create connection without a Q[Core]Application instance");
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if (!qdbus_loadLibDBus()) {
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QDBusConnectionPrivate *d = 0;
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return QDBusConnection(d);
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}
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QMutexLocker locker(&_q_manager()->mutex);
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QDBusConnectionPrivate *d = _q_manager()->connection(name);
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if (d || name.isEmpty())
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return QDBusConnection(d);
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d = new QDBusConnectionPrivate;
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DBusConnection *c = 0;
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QDBusErrorInternal error;
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switch (type) {
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case SystemBus:
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c = q_dbus_bus_get_private(DBUS_BUS_SYSTEM, error);
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break;
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case SessionBus:
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c = q_dbus_bus_get_private(DBUS_BUS_SESSION, error);
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break;
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case ActivationBus:
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c = q_dbus_bus_get_private(DBUS_BUS_STARTER, error);
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break;
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}
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d->setConnection(c, error); //setConnection does the error handling for us
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_q_manager()->setConnection(name, d);
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QDBusConnection retval(d);
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// create the bus service
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// will lock in QDBusConnectionPrivate::connectRelay()
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d->setBusService(retval);
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return retval;
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}
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/*!
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Opens a peer-to-peer connection on address \a address and associate with it the
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connection name \a name. Returns a QDBusConnection object associated with that connection.
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*/
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QDBusConnection QDBusConnection::connectToBus(const QString &address,
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const QString &name)
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{
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// Q_ASSERT_X(QCoreApplication::instance(), "QDBusConnection::addConnection",
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// "Cannot create connection without a Q[Core]Application instance");
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if (!qdbus_loadLibDBus()){
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QDBusConnectionPrivate *d = 0;
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return QDBusConnection(d);
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}
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QMutexLocker locker(&_q_manager()->mutex);
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QDBusConnectionPrivate *d = _q_manager()->connection(name);
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if (d || name.isEmpty())
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return QDBusConnection(d);
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d = new QDBusConnectionPrivate;
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// setConnection does the error handling for us
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QDBusErrorInternal error;
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DBusConnection *c = q_dbus_connection_open_private(address.toUtf8().constData(), error);
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if (c) {
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if (!q_dbus_bus_register(c, error)) {
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q_dbus_connection_unref(c);
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c = 0;
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}
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}
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d->setConnection(c, error);
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_q_manager()->setConnection(name, d);
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QDBusConnection retval(d);
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// create the bus service
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// will lock in QDBusConnectionPrivate::connectRelay()
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d->setBusService(retval);
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return retval;
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}
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|
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/*!
|
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Closes the connection of name \a name.
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Note that if there are still QDBusConnection objects associated
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with the same connection, the connection will not be closed until
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all references are dropped. However, no further references can be
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created using the QDBusConnection constructor.
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*/
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void QDBusConnection::disconnectFromBus(const QString &name)
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{
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if (_q_manager()) {
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407 |
QMutexLocker locker(&_q_manager()->mutex);
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408 |
_q_manager()->removeConnection(name);
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}
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}
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|
411 |
|
|
412 |
/*!
|
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413 |
Sends the \a message over this connection, without waiting for a
|
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414 |
reply. This is suitable for errors, signals, and return values as
|
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415 |
well as calls whose return values are not necessary.
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417 |
Returns true if the message was queued successfully, false otherwise.
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|
418 |
*/
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|
419 |
bool QDBusConnection::send(const QDBusMessage &message) const
|
|
420 |
{
|
|
421 |
if (!d || !d->connection) {
|
|
422 |
QDBusError err = QDBusError(QDBusError::Disconnected,
|
|
423 |
QLatin1String("Not connected to D-BUS server"));
|
|
424 |
if (d)
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|
425 |
d->lastError = err;
|
|
426 |
return false;
|
|
427 |
}
|
|
428 |
return d->send(message) != 0;
|
|
429 |
}
|
|
430 |
|
|
431 |
/*!
|
|
432 |
Sends the \a message over this connection and returns immediately.
|
|
433 |
When the reply is received, the method \a returnMethod is called in
|
|
434 |
the \a receiver object. If an error occurs, the method \a errorMethod
|
|
435 |
will be called instead.
|
|
436 |
|
|
437 |
If no reply is received within \a timeout milliseconds, an automatic
|
|
438 |
error will be delivered indicating the expiration of the call.
|
|
439 |
The default \a timeout is -1, which will be replaced with an
|
|
440 |
implementation-defined value that is suitable for inter-process
|
|
441 |
communications (generally, 25 seconds).
|
|
442 |
|
|
443 |
This function is suitable for method calls only. It is guaranteed
|
|
444 |
that the slot will be called exactly once with the reply, as long
|
|
445 |
as the parameter types match and no error occurs.
|
|
446 |
|
|
447 |
Returns true if the message was sent, or false if the message could
|
|
448 |
not be sent.
|
|
449 |
*/
|
|
450 |
bool QDBusConnection::callWithCallback(const QDBusMessage &message, QObject *receiver,
|
|
451 |
const char *returnMethod, const char *errorMethod,
|
|
452 |
int timeout) const
|
|
453 |
{
|
|
454 |
if (!d || !d->connection) {
|
|
455 |
QDBusError err = QDBusError(QDBusError::Disconnected,
|
|
456 |
QLatin1String("Not connected to D-BUS server"));
|
|
457 |
if (d)
|
|
458 |
d->lastError = err;
|
|
459 |
return false;
|
|
460 |
}
|
|
461 |
return d->sendWithReplyAsync(message, receiver, returnMethod, errorMethod, timeout) != 0;
|
|
462 |
}
|
|
463 |
|
|
464 |
/*!
|
|
465 |
\overload
|
|
466 |
\deprecated
|
|
467 |
Sends the \a message over this connection and returns immediately.
|
|
468 |
When the reply is received, the method \a returnMethod is called in
|
|
469 |
the \a receiver object.
|
|
470 |
|
|
471 |
This function is suitable for method calls only. It is guaranteed
|
|
472 |
that the slot will be called exactly once with the reply, as long
|
|
473 |
as the parameter types match and no error occurs.
|
|
474 |
|
|
475 |
This function is dangerous because it cannot report errors, including
|
|
476 |
the expiration of the timeout.
|
|
477 |
|
|
478 |
Returns true if the message was sent, or false if the message could
|
|
479 |
not be sent.
|
|
480 |
*/
|
|
481 |
bool QDBusConnection::callWithCallback(const QDBusMessage &message, QObject *receiver,
|
|
482 |
const char *returnMethod, int timeout) const
|
|
483 |
{
|
|
484 |
return callWithCallback(message, receiver, returnMethod, 0, timeout);
|
|
485 |
}
|
|
486 |
|
|
487 |
/*!
|
|
488 |
Sends the \a message over this connection and blocks, waiting for
|
|
489 |
a reply, for at most \a timeout milliseconds. This function is
|
|
490 |
suitable for method calls only. It returns the reply message as
|
|
491 |
its return value, which will be either of type
|
|
492 |
QDBusMessage::ReplyMessage or QDBusMessage::ErrorMessage.
|
|
493 |
|
|
494 |
See the QDBusInterface::call() function for a more friendly way
|
|
495 |
of placing calls.
|
|
496 |
|
|
497 |
\warning If \a mode is QDBus::BlockWithGui, this function will
|
|
498 |
reenter the Qt event loop in order to wait for the
|
|
499 |
reply. During the wait, it may deliver signals and other
|
|
500 |
method calls to your application. Therefore, it must be
|
|
501 |
prepared to handle a reentrancy whenever a call is
|
|
502 |
placed with call().
|
|
503 |
*/
|
|
504 |
QDBusMessage QDBusConnection::call(const QDBusMessage &message, QDBus::CallMode mode, int timeout) const
|
|
505 |
{
|
|
506 |
if (!d || !d->connection) {
|
|
507 |
QDBusError err = QDBusError(QDBusError::Disconnected,
|
|
508 |
QLatin1String("Not connected to D-Bus server"));
|
|
509 |
if (d)
|
|
510 |
d->lastError = err;
|
|
511 |
|
|
512 |
return QDBusMessage::createError(err);
|
|
513 |
}
|
|
514 |
|
|
515 |
if (mode != QDBus::NoBlock)
|
|
516 |
return d->sendWithReply(message, mode, timeout);
|
|
517 |
|
|
518 |
d->send(message);
|
|
519 |
QDBusMessage retval;
|
|
520 |
retval << QVariant(); // add one argument (to avoid .at(0) problems)
|
|
521 |
return retval;
|
|
522 |
}
|
|
523 |
|
|
524 |
/*!
|
|
525 |
\since 4.5
|
|
526 |
Sends the \a message over this connection and returns
|
|
527 |
immediately. This function is suitable for method calls only. It
|
|
528 |
returns an object of type QDBusPendingCall which can be used to
|
|
529 |
track the status of the reply. The \a timeout parameter is used to
|
|
530 |
determine when an auto-generated error reply may be emitted and is
|
|
531 |
also the upper limit for waiting in QDBusPendingCall::waitForFinished().
|
|
532 |
|
|
533 |
See the QDBusInterface::asyncCall() function for a more friendly way
|
|
534 |
of placing calls.
|
|
535 |
*/
|
|
536 |
QDBusPendingCall QDBusConnection::asyncCall(const QDBusMessage &message, int timeout) const
|
|
537 |
{
|
|
538 |
if (!d || !d->connection) {
|
|
539 |
return QDBusPendingCall(0); // null pointer -> disconnected
|
|
540 |
}
|
|
541 |
|
|
542 |
QDBusPendingCallPrivate *priv = d->sendWithReplyAsync(message, timeout);
|
|
543 |
return QDBusPendingCall(priv);
|
|
544 |
}
|
|
545 |
|
|
546 |
/*!
|
|
547 |
Connects the signal specified by the \a service, \a path, \a interface and \a name parameters to
|
|
548 |
the slot \a slot in object \a receiver. The arguments \a service and \a path can be empty,
|
|
549 |
denoting a connection to any signal of the (\a interface, \a name) pair, from any remote
|
|
550 |
application.
|
|
551 |
|
|
552 |
Returns true if the connection was successful.
|
|
553 |
|
|
554 |
\warning The signal will only be delivered to the slot if the parameters match. This verification
|
|
555 |
can be done only when the signal is received, not at connection time.
|
|
556 |
*/
|
|
557 |
bool QDBusConnection::connect(const QString &service, const QString &path, const QString& interface,
|
|
558 |
const QString &name, QObject *receiver, const char *slot)
|
|
559 |
{
|
|
560 |
return connect(service, path, interface, name, QString(), receiver, slot);
|
|
561 |
}
|
|
562 |
|
|
563 |
/*!
|
|
564 |
Disconnects the signal specified by the \a service, \a path, \a interface and \a name parameters from
|
|
565 |
the slot \a slot in object \a receiver. The arguments \a service and \a path can be empty,
|
|
566 |
denoting a disconnection from all signals of the (\a interface, \a name) pair, from all remote
|
|
567 |
applications.
|
|
568 |
|
|
569 |
Returns true if the disconnection was successful.
|
|
570 |
*/
|
|
571 |
bool QDBusConnection::disconnect(const QString &service, const QString &path, const QString &interface,
|
|
572 |
const QString &name, QObject *receiver, const char *slot)
|
|
573 |
{
|
|
574 |
return disconnect(service, path, interface, name, QString(), receiver, slot);
|
|
575 |
}
|
|
576 |
|
|
577 |
/*!
|
|
578 |
\overload
|
|
579 |
|
|
580 |
Connects the signal to the slot \a slot in object \a
|
|
581 |
receiver. Unlike the other connect() overload, this function
|
|
582 |
allows one to specify the parameter signature to be connected
|
|
583 |
using the \a signature variable. The function will then verify
|
|
584 |
that this signature can be delivered to the slot specified by \a
|
|
585 |
slot and return false otherwise.
|
|
586 |
|
|
587 |
\note This function verifies that the signal signature matches the
|
|
588 |
slot's parameters, but it does not verify that the actual
|
|
589 |
signal exists with the given signature in the remote
|
|
590 |
service.
|
|
591 |
*/
|
|
592 |
bool QDBusConnection::connect(const QString &service, const QString &path, const QString& interface,
|
|
593 |
const QString &name, const QString &signature,
|
|
594 |
QObject *receiver, const char *slot)
|
|
595 |
{
|
|
596 |
if (!receiver || !slot || !d || !d->connection)
|
|
597 |
return false;
|
|
598 |
if (!interface.isEmpty() && !QDBusUtil::isValidInterfaceName(interface))
|
|
599 |
return false;
|
|
600 |
if (interface.isEmpty() && name.isEmpty())
|
|
601 |
return false;
|
|
602 |
|
|
603 |
// check the slot
|
|
604 |
QDBusConnectionPrivate::SignalHook hook;
|
|
605 |
QString key;
|
|
606 |
QString name2 = name;
|
|
607 |
if (name2.isNull())
|
|
608 |
name2.detach();
|
|
609 |
|
|
610 |
QString owner = d->getNameOwner(service); // we don't care if the owner is empty
|
|
611 |
hook.signature = signature; // it might get started later
|
|
612 |
if (!d->prepareHook(hook, key, service, owner, path, interface, name, receiver, slot, 0, false))
|
|
613 |
return false; // don't connect
|
|
614 |
|
|
615 |
// avoid duplicating:
|
|
616 |
QDBusWriteLocker locker(ConnectAction, d);
|
|
617 |
QDBusConnectionPrivate::SignalHookHash::ConstIterator it = d->signalHooks.find(key);
|
|
618 |
QDBusConnectionPrivate::SignalHookHash::ConstIterator end = d->signalHooks.constEnd();
|
|
619 |
for ( ; it != end && it.key() == key; ++it) {
|
|
620 |
const QDBusConnectionPrivate::SignalHook &entry = it.value();
|
|
621 |
if (entry.service == hook.service &&
|
|
622 |
entry.owner == hook.owner &&
|
|
623 |
entry.path == hook.path &&
|
|
624 |
entry.signature == hook.signature &&
|
|
625 |
entry.obj == hook.obj &&
|
|
626 |
entry.midx == hook.midx) {
|
|
627 |
// no need to compare the parameters if it's the same slot
|
|
628 |
return true; // already there
|
|
629 |
}
|
|
630 |
}
|
|
631 |
|
|
632 |
d->connectSignal(key, hook);
|
|
633 |
return true;
|
|
634 |
}
|
|
635 |
|
|
636 |
/*!
|
|
637 |
\overload
|
|
638 |
|
|
639 |
Disconnects the signal from the slot \a slot in object \a
|
|
640 |
receiver. Unlike the other disconnect() overload, this function
|
|
641 |
allows one to specify the parameter signature to be disconnected
|
|
642 |
using the \a signature variable. The function will then verify
|
|
643 |
that this signature is connected to the slot specified by \a slot
|
|
644 |
and return false otherwise.
|
|
645 |
*/
|
|
646 |
bool QDBusConnection::disconnect(const QString &service, const QString &path, const QString& interface,
|
|
647 |
const QString &name, const QString &signature,
|
|
648 |
QObject *receiver, const char *slot)
|
|
649 |
{
|
|
650 |
if (!receiver || !slot || !d || !d->connection)
|
|
651 |
return false;
|
|
652 |
if (!interface.isEmpty() && !QDBusUtil::isValidInterfaceName(interface))
|
|
653 |
return false;
|
|
654 |
if (interface.isEmpty() && name.isEmpty())
|
|
655 |
return false;
|
|
656 |
|
|
657 |
// check the slot
|
|
658 |
QDBusConnectionPrivate::SignalHook hook;
|
|
659 |
QString key;
|
|
660 |
QString name2 = name;
|
|
661 |
if (name2.isNull())
|
|
662 |
name2.detach();
|
|
663 |
|
|
664 |
QString owner = d->getNameOwner(service); // we don't care of owner is empty
|
|
665 |
hook.signature = signature;
|
|
666 |
if (!d->prepareHook(hook, key, service, owner, path, interface, name, receiver, slot, 0, false))
|
|
667 |
return false; // don't disconnect
|
|
668 |
|
|
669 |
// avoid duplicating:
|
|
670 |
QDBusWriteLocker locker(DisconnectAction, d);
|
|
671 |
QDBusConnectionPrivate::SignalHookHash::Iterator it = d->signalHooks.find(key);
|
|
672 |
QDBusConnectionPrivate::SignalHookHash::Iterator end = d->signalHooks.end();
|
|
673 |
for ( ; it != end && it.key() == key; ++it) {
|
|
674 |
const QDBusConnectionPrivate::SignalHook &entry = it.value();
|
|
675 |
if (entry.service == hook.service &&
|
|
676 |
entry.owner == hook.owner &&
|
|
677 |
entry.path == hook.path &&
|
|
678 |
entry.signature == hook.signature &&
|
|
679 |
entry.obj == hook.obj &&
|
|
680 |
entry.midx == hook.midx) {
|
|
681 |
// no need to compare the parameters if it's the same slot
|
|
682 |
d->disconnectSignal(it);
|
|
683 |
return true; // it was there
|
|
684 |
}
|
|
685 |
}
|
|
686 |
|
|
687 |
// the slot was not found
|
|
688 |
return false;
|
|
689 |
}
|
|
690 |
|
|
691 |
/*!
|
|
692 |
Registers the object \a object at path \a path and returns true if
|
|
693 |
the registration was successful. The \a options parameter
|
|
694 |
specifies how much of the object \a object will be exposed through
|
|
695 |
D-Bus.
|
|
696 |
|
|
697 |
This function does not replace existing objects: if there is already an object registered at
|
|
698 |
path \a path, this function will return false. Use unregisterObject() to unregister it first.
|
|
699 |
|
|
700 |
You cannot register an object as a child object of an object that
|
|
701 |
was registered with QDBusConnection::ExportChildObjects.
|
|
702 |
*/
|
|
703 |
bool QDBusConnection::registerObject(const QString &path, QObject *object, RegisterOptions options)
|
|
704 |
{
|
|
705 |
Q_ASSERT_X(QDBusUtil::isValidObjectPath(path), "QDBusConnection::registerObject",
|
|
706 |
"Invalid object path given");
|
|
707 |
if (!d || !d->connection || !object || !options || !QDBusUtil::isValidObjectPath(path))
|
|
708 |
return false;
|
|
709 |
|
|
710 |
QStringList pathComponents = path.split(QLatin1Char('/'));
|
|
711 |
if (pathComponents.last().isEmpty())
|
|
712 |
pathComponents.removeLast();
|
|
713 |
QDBusWriteLocker locker(RegisterObjectAction, d);
|
|
714 |
|
|
715 |
// lower-bound search for where this object should enter in the tree
|
|
716 |
QDBusConnectionPrivate::ObjectTreeNode *node = &d->rootNode;
|
|
717 |
int i = 1;
|
|
718 |
while (node) {
|
|
719 |
if (pathComponents.count() == i) {
|
|
720 |
// this node exists
|
|
721 |
// consider it free if there's no object here and the user is not trying to
|
|
722 |
// replace the object sub-tree
|
|
723 |
if ((options & ExportChildObjects && !node->children.isEmpty()) || node->obj)
|
|
724 |
return false;
|
|
725 |
|
|
726 |
// we can add the object here
|
|
727 |
node->obj = object;
|
|
728 |
node->flags = options;
|
|
729 |
|
|
730 |
d->registerObject(node);
|
|
731 |
//qDebug("REGISTERED FOR %s", path.toLocal8Bit().constData());
|
|
732 |
return true;
|
|
733 |
}
|
|
734 |
|
|
735 |
// find the position where we'd insert the node
|
|
736 |
QDBusConnectionPrivate::ObjectTreeNode::DataList::Iterator it =
|
|
737 |
qLowerBound(node->children.begin(), node->children.end(), pathComponents.at(i));
|
|
738 |
if (it != node->children.end() && it->name == pathComponents.at(i)) {
|
|
739 |
// match: this node exists
|
|
740 |
node = it;
|
|
741 |
|
|
742 |
// are we allowed to go deeper?
|
|
743 |
if (node->flags & ExportChildObjects) {
|
|
744 |
// we're not
|
|
745 |
qDebug("Cannot register object at %s because %s exports its own child objects",
|
|
746 |
qPrintable(path), qPrintable(pathComponents.at(i)));
|
|
747 |
return false;
|
|
748 |
}
|
|
749 |
} else {
|
|
750 |
// add entry
|
|
751 |
node = node->children.insert(it, pathComponents.at(i));
|
|
752 |
}
|
|
753 |
|
|
754 |
// iterate
|
|
755 |
++i;
|
|
756 |
}
|
|
757 |
|
|
758 |
Q_ASSERT_X(false, "QDBusConnection::registerObject", "The impossible happened");
|
|
759 |
return false;
|
|
760 |
}
|
|
761 |
|
|
762 |
/*!
|
|
763 |
Unregisters an object that was registered with the registerObject() at the object path given by
|
|
764 |
\a path and, if \a mode is QDBusConnection::UnregisterTree, all of its sub-objects too.
|
|
765 |
|
|
766 |
Note that you cannot unregister objects that were not registered with registerObject().
|
|
767 |
*/
|
|
768 |
void QDBusConnection::unregisterObject(const QString &path, UnregisterMode mode)
|
|
769 |
{
|
|
770 |
if (!d || !d->connection || !QDBusUtil::isValidObjectPath(path))
|
|
771 |
return;
|
|
772 |
|
|
773 |
QStringList pathComponents = path.split(QLatin1Char('/'));
|
|
774 |
QDBusWriteLocker locker(UnregisterObjectAction, d);
|
|
775 |
QDBusConnectionPrivate::ObjectTreeNode *node = &d->rootNode;
|
|
776 |
int i = 1;
|
|
777 |
|
|
778 |
// find the object
|
|
779 |
while (node) {
|
|
780 |
if (pathComponents.count() == i) {
|
|
781 |
// found it
|
|
782 |
node->obj = 0;
|
|
783 |
node->flags = 0;
|
|
784 |
|
|
785 |
if (mode == UnregisterTree) {
|
|
786 |
// clear the sub-tree as well
|
|
787 |
node->children.clear(); // can't disconnect the objects because we really don't know if they can
|
|
788 |
// be found somewhere else in the path too
|
|
789 |
}
|
|
790 |
|
|
791 |
return;
|
|
792 |
}
|
|
793 |
|
|
794 |
QDBusConnectionPrivate::ObjectTreeNode::DataList::Iterator it =
|
|
795 |
qLowerBound(node->children.begin(), node->children.end(), pathComponents.at(i));
|
|
796 |
if (it == node->children.end() || it->name != pathComponents.at(i))
|
|
797 |
break; // node not found
|
|
798 |
|
|
799 |
node = it;
|
|
800 |
++i;
|
|
801 |
}
|
|
802 |
}
|
|
803 |
|
|
804 |
/*!
|
|
805 |
Return the object that was registered with the registerObject() at the object path given by
|
|
806 |
\a path.
|
|
807 |
*/
|
|
808 |
QObject *QDBusConnection::objectRegisteredAt(const QString &path) const
|
|
809 |
{
|
|
810 |
Q_ASSERT_X(QDBusUtil::isValidObjectPath(path), "QDBusConnection::registeredObject",
|
|
811 |
"Invalid object path given");
|
|
812 |
if (!d || !d->connection || !QDBusUtil::isValidObjectPath(path))
|
|
813 |
return false;
|
|
814 |
|
|
815 |
QStringList pathComponents = path.split(QLatin1Char('/'));
|
|
816 |
if (pathComponents.last().isEmpty())
|
|
817 |
pathComponents.removeLast();
|
|
818 |
|
|
819 |
// lower-bound search for where this object should enter in the tree
|
|
820 |
QDBusReadLocker lock(ObjectRegisteredAtAction, d);
|
|
821 |
const QDBusConnectionPrivate::ObjectTreeNode *node = &d->rootNode;
|
|
822 |
|
|
823 |
int i = 1;
|
|
824 |
while (node) {
|
|
825 |
if (pathComponents.count() == i)
|
|
826 |
return node->obj;
|
|
827 |
|
|
828 |
QDBusConnectionPrivate::ObjectTreeNode::DataList::ConstIterator it =
|
|
829 |
qLowerBound(node->children.constBegin(), node->children.constEnd(), pathComponents.at(i));
|
|
830 |
if (it == node->children.constEnd() || it->name != pathComponents.at(i))
|
|
831 |
break; // node not found
|
|
832 |
|
|
833 |
node = it;
|
|
834 |
++i;
|
|
835 |
}
|
|
836 |
return 0;
|
|
837 |
}
|
|
838 |
|
|
839 |
/*!
|
|
840 |
Returns a QDBusConnectionInterface object that represents the
|
|
841 |
D-Bus server interface on this connection.
|
|
842 |
*/
|
|
843 |
QDBusConnectionInterface *QDBusConnection::interface() const
|
|
844 |
{
|
|
845 |
if (!d)
|
|
846 |
return 0;
|
|
847 |
return d->busService;
|
|
848 |
}
|
|
849 |
|
|
850 |
/*!
|
|
851 |
Returns true if this QDBusConnection object is connected.
|
|
852 |
|
|
853 |
If it isn't connected, calling connectToBus() on the same
|
|
854 |
connection name will not make be connected. You need to call the
|
|
855 |
QDBusConnection constructor again.
|
|
856 |
*/
|
|
857 |
bool QDBusConnection::isConnected() const
|
|
858 |
{
|
|
859 |
return d && d->connection && q_dbus_connection_get_is_connected(d->connection);
|
|
860 |
}
|
|
861 |
|
|
862 |
/*!
|
|
863 |
Returns the last error that happened in this connection.
|
|
864 |
|
|
865 |
This function is provided for low-level code. If you're using
|
|
866 |
QDBusInterface::call(), error codes are reported by its return
|
|
867 |
value.
|
|
868 |
|
|
869 |
\sa QDBusInterface, QDBusMessage
|
|
870 |
*/
|
|
871 |
QDBusError QDBusConnection::lastError() const
|
|
872 |
{
|
|
873 |
return d ? d->lastError : QDBusError();
|
|
874 |
}
|
|
875 |
|
|
876 |
/*!
|
|
877 |
Returns the unique connection name for this connection, if this QDBusConnection object is
|
|
878 |
connected, or an empty QString otherwise.
|
|
879 |
|
|
880 |
A Unique Connection Name is a string in the form ":x.xxx" (where x
|
|
881 |
are decimal digits) that is assigned by the D-Bus server daemon
|
|
882 |
upon connection. It uniquely identifies this client in the bus.
|
|
883 |
|
|
884 |
This function returns an empty QString for peer-to-peer connections.
|
|
885 |
*/
|
|
886 |
QString QDBusConnection::baseService() const
|
|
887 |
{
|
|
888 |
return d ? d->baseService : QString();
|
|
889 |
}
|
|
890 |
|
|
891 |
/*!
|
|
892 |
\since 4.5
|
|
893 |
|
|
894 |
Returns the connection name for this connection, as given as the
|
|
895 |
name parameter to connectToBus().
|
|
896 |
|
|
897 |
The connection name can be used to uniquely identify actual
|
|
898 |
underlying connections to buses. Copies made from a single
|
|
899 |
connection will always implicitly share the underlying connection,
|
|
900 |
and hence will have the same connection name.
|
|
901 |
|
|
902 |
Inversely, two connections having different connection names will
|
|
903 |
always either be connected to different buses, or have a different
|
|
904 |
unique name (as returned by baseService()) on that bus.
|
|
905 |
|
|
906 |
\sa connectToBus(), disconnectFromBus()
|
|
907 |
*/
|
|
908 |
QString QDBusConnection::name() const
|
|
909 |
{
|
|
910 |
return d ? d->name : QString();
|
|
911 |
}
|
|
912 |
|
|
913 |
/*!
|
|
914 |
Attempts to register the \a serviceName on the D-Bus server and
|
|
915 |
returns true if the registration succeded. The registration will
|
|
916 |
fail if the name is already registered by another application.
|
|
917 |
|
|
918 |
\sa unregisterService(), QDBusConnectionInterface::registerService()
|
|
919 |
*/
|
|
920 |
bool QDBusConnection::registerService(const QString &serviceName)
|
|
921 |
{
|
|
922 |
if (interface() && interface()->registerService(serviceName)) {
|
|
923 |
if (d) d->registerService(serviceName);
|
|
924 |
return true;
|
|
925 |
}
|
|
926 |
return false;
|
|
927 |
}
|
|
928 |
|
|
929 |
/*!
|
|
930 |
Unregisters the service \a serviceName that was previously
|
|
931 |
registered with registerService() and returns true if it
|
|
932 |
succeeded.
|
|
933 |
|
|
934 |
\sa registerService(), QDBusConnectionInterface::unregisterService()
|
|
935 |
*/
|
|
936 |
bool QDBusConnection::unregisterService(const QString &serviceName)
|
|
937 |
{
|
|
938 |
if (interface()->unregisterService(serviceName)) {
|
|
939 |
if (d) d->unregisterService(serviceName);
|
|
940 |
return true;
|
|
941 |
}
|
|
942 |
return false;
|
|
943 |
}
|
|
944 |
|
|
945 |
static const char _q_sessionBusName[] = "qt_default_session_bus";
|
|
946 |
static const char _q_systemBusName[] = "qt_default_system_bus";
|
|
947 |
|
|
948 |
class QDBusDefaultConnection: public QDBusConnection
|
|
949 |
{
|
|
950 |
const char *ownName;
|
|
951 |
public:
|
|
952 |
inline QDBusDefaultConnection(BusType type, const char *name)
|
|
953 |
: QDBusConnection(connectToBus(type, QString::fromLatin1(name))), ownName(name)
|
|
954 |
{ }
|
|
955 |
|
|
956 |
inline ~QDBusDefaultConnection()
|
|
957 |
{ disconnectFromBus(QString::fromLatin1(ownName)); }
|
|
958 |
};
|
|
959 |
|
|
960 |
Q_GLOBAL_STATIC_WITH_ARGS(QDBusDefaultConnection, _q_sessionBus,
|
|
961 |
(QDBusConnection::SessionBus, _q_sessionBusName))
|
|
962 |
Q_GLOBAL_STATIC_WITH_ARGS(QDBusDefaultConnection, _q_systemBus,
|
|
963 |
(QDBusConnection::SystemBus, _q_systemBusName))
|
|
964 |
|
|
965 |
QDBusConnection QDBusConnection::sessionBus()
|
|
966 |
{
|
|
967 |
return *_q_sessionBus();
|
|
968 |
}
|
|
969 |
|
|
970 |
QDBusConnection QDBusConnection::systemBus()
|
|
971 |
{
|
|
972 |
return *_q_systemBus();
|
|
973 |
}
|
|
974 |
|
|
975 |
/*!
|
|
976 |
\nonreentrant
|
|
977 |
|
|
978 |
Returns the connection that sent the signal, if called in a slot activated
|
|
979 |
by QDBus; otherwise it returns 0.
|
|
980 |
|
|
981 |
\note Please avoid this function. This function is not thread-safe, so if
|
|
982 |
there's any other thread delivering a D-Bus call, this function may return
|
|
983 |
the wrong connection. In new code, please use QDBusContext::connection()
|
|
984 |
(see that class for a description on how to use it).
|
|
985 |
*/
|
|
986 |
QDBusConnection QDBusConnection::sender()
|
|
987 |
{
|
|
988 |
return QDBusConnection(_q_manager()->sender());
|
|
989 |
}
|
|
990 |
|
|
991 |
/*!
|
|
992 |
\internal
|
|
993 |
*/
|
|
994 |
void QDBusConnectionPrivate::setSender(const QDBusConnectionPrivate *s)
|
|
995 |
{
|
|
996 |
_q_manager()->setSender(s);
|
|
997 |
}
|
|
998 |
|
|
999 |
/*!
|
|
1000 |
\internal
|
|
1001 |
*/
|
|
1002 |
void QDBusConnectionPrivate::setConnection(const QString &name, QDBusConnectionPrivate *c)
|
|
1003 |
{
|
|
1004 |
_q_manager()->setConnection(name, c);
|
|
1005 |
}
|
|
1006 |
|
|
1007 |
/*!
|
|
1008 |
\internal
|
|
1009 |
*/
|
|
1010 |
void QDBusConnectionPrivate::setBusService(const QDBusConnection &connection)
|
|
1011 |
{
|
|
1012 |
busService = new QDBusConnectionInterface(connection, this);
|
|
1013 |
ref.deref(); // busService has increased the refcounting to us
|
|
1014 |
// avoid cyclic refcounting
|
|
1015 |
// if (mode != PeerMode)
|
|
1016 |
QObject::connect(busService, SIGNAL(serviceOwnerChanged(QString,QString,QString)),
|
|
1017 |
this, SIGNAL(serviceOwnerChanged(QString,QString,QString)));
|
|
1018 |
|
|
1019 |
QObject::connect(this, SIGNAL(callWithCallbackFailed(QDBusError,QDBusMessage)),
|
|
1020 |
busService, SIGNAL(callWithCallbackFailed(QDBusError,QDBusMessage)),
|
|
1021 |
Qt::QueuedConnection);
|
|
1022 |
|
|
1023 |
}
|
|
1024 |
|
|
1025 |
/*!
|
|
1026 |
\namespace QDBus
|
|
1027 |
\inmodule QtDBus
|
|
1028 |
|
|
1029 |
\brief The QDBus namespace contains miscellaneous identifiers used
|
|
1030 |
throughout the QtDBus library.
|
|
1031 |
*/
|
|
1032 |
|
|
1033 |
/*!
|
|
1034 |
\enum QDBus::CallMode
|
|
1035 |
|
|
1036 |
This enum describes the various ways of placing a function call. The valid modes are:
|
|
1037 |
|
|
1038 |
\value NoBlock Place the call but don't wait for the reply (the reply's contents
|
|
1039 |
will be discarded).
|
|
1040 |
\value Block Don't use an event loop to wait for a reply, but instead block on
|
|
1041 |
network operations while waiting. This means the
|
|
1042 |
user-interface may not be updated until the function returns.
|
|
1043 |
\value BlockWithGui Use the Qt event loop to wait for a reply. This means that the
|
|
1044 |
user-interface will stay responsive (processing input events),
|
|
1045 |
but it also means other events may happen, like signal delivery
|
|
1046 |
and other D-Bus method calls.
|
|
1047 |
\value AutoDetect Automatically detect if the called function has a reply.
|
|
1048 |
|
|
1049 |
When using BlockWithGui, applications must be prepared for reentrancy in any function.
|
|
1050 |
*/
|
|
1051 |
|
|
1052 |
QT_END_NAMESPACE
|