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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDBus module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qcoreapplication.h>
#include <qdebug.h>
#include <qmetaobject.h>
#include <qobject.h>
#include <qsocketnotifier.h>
#include <qstringlist.h>
#include <qtimer.h>
#include <qthread.h>
#include "qdbusargument.h"
#include "qdbusconnection_p.h"
#include "qdbusinterface_p.h"
#include "qdbusmessage.h"
#include "qdbusmetatype.h"
#include "qdbusmetatype_p.h"
#include "qdbusabstractadaptor.h"
#include "qdbusabstractadaptor_p.h"
#include "qdbusutil_p.h"
#include "qdbusmessage_p.h"
#include "qdbuscontext_p.h"
#include "qdbuspendingcall_p.h"
#include "qdbusintegrator_p.h"
#include "qdbusthreaddebug_p.h"
#ifndef QT_NO_DBUS
QT_BEGIN_NAMESPACE
static bool isDebugging;
#define qDBusDebug if (!::isDebugging); else qDebug
Q_GLOBAL_STATIC_WITH_ARGS(const QString, orgFreedesktopDBusString, (QLatin1String(DBUS_SERVICE_DBUS)))
static inline QString dbusServiceString()
{ return *orgFreedesktopDBusString(); }
static inline QString dbusInterfaceString()
{
// it's the same string, but just be sure
Q_ASSERT(*orgFreedesktopDBusString() == QLatin1String(DBUS_INTERFACE_DBUS));
return *orgFreedesktopDBusString();
}
static inline QDebug operator<<(QDebug dbg, const QThread *th)
{
dbg.nospace() << "QThread(ptr=" << (void*)th;
if (th && !th->objectName().isEmpty())
dbg.nospace() << ", name=" << th->objectName();
dbg.nospace() << ')';
return dbg.space();
}
#if QDBUS_THREAD_DEBUG
static inline QDebug operator<<(QDebug dbg, const QDBusConnectionPrivate *conn)
{
dbg.nospace() << "QDBusConnection("
<< "ptr=" << (void*)conn
<< ", name=" << conn->name
<< ", baseService=" << conn->baseService
<< ", thread=";
if (conn->thread() == QThread::currentThread())
dbg.nospace() << "same thread";
else
dbg.nospace() << conn->thread();
dbg.nospace() << ')';
return dbg.space();
}
Q_AUTOTEST_EXPORT void qdbusDefaultThreadDebug(int action, int condition, QDBusConnectionPrivate *conn)
{
qDBusDebug() << QThread::currentThread()
<< "QtDBus threading action" << action
<< (condition == QDBusLockerBase::BeforeLock ? "before lock" :
condition == QDBusLockerBase::AfterLock ? "after lock" :
condition == QDBusLockerBase::BeforeUnlock ? "before unlock" :
condition == QDBusLockerBase::AfterUnlock ? "after unlock" :
condition == QDBusLockerBase::BeforePost ? "before event posting" :
condition == QDBusLockerBase::AfterPost ? "after event posting" :
condition == QDBusLockerBase::BeforeDeliver ? "before event delivery" :
condition == QDBusLockerBase::AfterDeliver ? "after event delivery" :
condition == QDBusLockerBase::BeforeAcquire ? "before acquire" :
condition == QDBusLockerBase::AfterAcquire ? "after acquire" :
condition == QDBusLockerBase::BeforeRelease ? "before release" :
condition == QDBusLockerBase::AfterRelease ? "after release" :
"condition unknown")
<< "in connection" << conn;
}
Q_AUTOTEST_EXPORT qdbusThreadDebugFunc qdbusThreadDebug = 0;
#endif
typedef void (*QDBusSpyHook)(const QDBusMessage&);
typedef QVarLengthArray<QDBusSpyHook, 4> QDBusSpyHookList;
Q_GLOBAL_STATIC(QDBusSpyHookList, qDBusSpyHookList)
extern "C" {
// libdbus-1 callbacks
static bool qDBusRealAddTimeout(QDBusConnectionPrivate *d, DBusTimeout *timeout, int ms);
static dbus_bool_t qDBusAddTimeout(DBusTimeout *timeout, void *data)
{
Q_ASSERT(timeout);
Q_ASSERT(data);
// qDebug("addTimeout %d", q_dbus_timeout_get_interval(timeout));
QDBusConnectionPrivate *d = static_cast<QDBusConnectionPrivate *>(data);
if (!q_dbus_timeout_get_enabled(timeout))
return true;
QDBusWatchAndTimeoutLocker locker(AddTimeoutAction, d);
if (QCoreApplication::instance() && QThread::currentThread() == d->thread()) {
// correct thread
return qDBusRealAddTimeout(d, timeout, q_dbus_timeout_get_interval(timeout));
} else {
// wrong thread: sync back
QDBusConnectionCallbackEvent *ev = new QDBusConnectionCallbackEvent;
ev->subtype = QDBusConnectionCallbackEvent::AddTimeout;
d->timeoutsPendingAdd.append(qMakePair(timeout, q_dbus_timeout_get_interval(timeout)));
d->postEventToThread(AddTimeoutAction, d, ev);
return true;
}
}
static bool qDBusRealAddTimeout(QDBusConnectionPrivate *d, DBusTimeout *timeout, int ms)
{
Q_ASSERT(d->timeouts.keys(timeout).isEmpty());
int timerId = d->startTimer(ms);
if (!timerId)
return false;
d->timeouts[timerId] = timeout;
return true;
}
static void qDBusRemoveTimeout(DBusTimeout *timeout, void *data)
{
Q_ASSERT(timeout);
Q_ASSERT(data);
// qDebug("removeTimeout");
QDBusConnectionPrivate *d = static_cast<QDBusConnectionPrivate *>(data);
QDBusWatchAndTimeoutLocker locker(RemoveTimeoutAction, d);
// is it pending addition?
QDBusConnectionPrivate::PendingTimeoutList::iterator pit = d->timeoutsPendingAdd.begin();
while (pit != d->timeoutsPendingAdd.end()) {
if (pit->first == timeout)
pit = d->timeoutsPendingAdd.erase(pit);
else
++pit;
}
// is it a running timer?
bool correctThread = QCoreApplication::instance() && QThread::currentThread() == d->thread();
QDBusConnectionPrivate::TimeoutHash::iterator it = d->timeouts.begin();
while (it != d->timeouts.end()) {
if (it.value() == timeout) {
if (correctThread) {
// correct thread
d->killTimer(it.key());
} else {
// incorrect thread or no application, post an event for later
QDBusConnectionCallbackEvent *ev = new QDBusConnectionCallbackEvent;
ev->subtype = QDBusConnectionCallbackEvent::KillTimer;
ev->timerId = it.key();
d->postEventToThread(KillTimerAction, d, ev);
}
it = d->timeouts.erase(it);
break;
} else {
++it;
}
}
}
static void qDBusToggleTimeout(DBusTimeout *timeout, void *data)
{
Q_ASSERT(timeout);
Q_ASSERT(data);
//qDebug("ToggleTimeout");
qDBusRemoveTimeout(timeout, data);
qDBusAddTimeout(timeout, data);
}
static bool qDBusRealAddWatch(QDBusConnectionPrivate *d, DBusWatch *watch, int flags, int fd);
static dbus_bool_t qDBusAddWatch(DBusWatch *watch, void *data)
{
Q_ASSERT(watch);
Q_ASSERT(data);
QDBusConnectionPrivate *d = static_cast<QDBusConnectionPrivate *>(data);
int flags = q_dbus_watch_get_flags(watch);
int fd = q_dbus_watch_get_fd(watch);
if (QCoreApplication::instance() && QThread::currentThread() == d->thread()) {
return qDBusRealAddWatch(d, watch, flags, fd);
} else {
QDBusConnectionCallbackEvent *ev = new QDBusConnectionCallbackEvent;
ev->subtype = QDBusConnectionCallbackEvent::AddWatch;
ev->watch = watch;
ev->fd = fd;
ev->extra = flags;
d->postEventToThread(AddWatchAction, d, ev);
return true;
}
}
static bool qDBusRealAddWatch(QDBusConnectionPrivate *d, DBusWatch *watch, int flags, int fd)
{
QDBusConnectionPrivate::Watcher watcher;
QDBusWatchAndTimeoutLocker locker(AddWatchAction, d);
if (flags & DBUS_WATCH_READABLE) {
//qDebug("addReadWatch %d", fd);
watcher.watch = watch;
if (QCoreApplication::instance()) {
watcher.read = new QSocketNotifier(fd, QSocketNotifier::Read, d);
watcher.read->setEnabled(q_dbus_watch_get_enabled(watch));
d->connect(watcher.read, SIGNAL(activated(int)), SLOT(socketRead(int)));
}
}
if (flags & DBUS_WATCH_WRITABLE) {
//qDebug("addWriteWatch %d", fd);
watcher.watch = watch;
if (QCoreApplication::instance()) {
watcher.write = new QSocketNotifier(fd, QSocketNotifier::Write, d);
watcher.write->setEnabled(q_dbus_watch_get_enabled(watch));
d->connect(watcher.write, SIGNAL(activated(int)), SLOT(socketWrite(int)));
}
}
d->watchers.insertMulti(fd, watcher);
return true;
}
static void qDBusRemoveWatch(DBusWatch *watch, void *data)
{
Q_ASSERT(watch);
Q_ASSERT(data);
//qDebug("remove watch");
QDBusConnectionPrivate *d = static_cast<QDBusConnectionPrivate *>(data);
int fd = q_dbus_watch_get_fd(watch);
QDBusWatchAndTimeoutLocker locker(RemoveWatchAction, d);
QDBusConnectionPrivate::WatcherHash::iterator i = d->watchers.find(fd);
while (i != d->watchers.end() && i.key() == fd) {
if (i.value().watch == watch) {
if (QCoreApplication::instance() && QThread::currentThread() == d->thread()) {
// correct thread, delete the socket notifiers
delete i.value().read;
delete i.value().write;
} else {
// incorrect thread or no application, use delete later
if (i->read)
i->read->deleteLater();
if (i->write)
i->write->deleteLater();
}
i = d->watchers.erase(i);
} else {
++i;
}
}
}
static void qDBusRealToggleWatch(QDBusConnectionPrivate *d, DBusWatch *watch, int fd);
static void qDBusToggleWatch(DBusWatch *watch, void *data)
{
Q_ASSERT(watch);
Q_ASSERT(data);
QDBusConnectionPrivate *d = static_cast<QDBusConnectionPrivate *>(data);
int fd = q_dbus_watch_get_fd(watch);
if (QCoreApplication::instance() && QThread::currentThread() == d->thread()) {
qDBusRealToggleWatch(d, watch, fd);
} else {
QDBusConnectionCallbackEvent *ev = new QDBusConnectionCallbackEvent;
ev->subtype = QDBusConnectionCallbackEvent::ToggleWatch;
ev->watch = watch;
ev->fd = fd;
d->postEventToThread(ToggleWatchAction, d, ev);
}
}
static void qDBusRealToggleWatch(QDBusConnectionPrivate *d, DBusWatch *watch, int fd)
{
QDBusWatchAndTimeoutLocker locker(ToggleWatchAction, d);
QDBusConnectionPrivate::WatcherHash::iterator i = d->watchers.find(fd);
while (i != d->watchers.end() && i.key() == fd) {
if (i.value().watch == watch) {
bool enabled = q_dbus_watch_get_enabled(watch);
int flags = q_dbus_watch_get_flags(watch);
//qDebug("toggle watch %d to %d (write: %d, read: %d)", q_dbus_watch_get_fd(watch), enabled, flags & DBUS_WATCH_WRITABLE, flags & DBUS_WATCH_READABLE);
if (flags & DBUS_WATCH_READABLE && i.value().read)
i.value().read->setEnabled(enabled);
if (flags & DBUS_WATCH_WRITABLE && i.value().write)
i.value().write->setEnabled(enabled);
return;
}
++i;
}
}
static void qDBusUpdateDispatchStatus(DBusConnection *connection, DBusDispatchStatus new_status, void *data)
{
Q_ASSERT(connection);
Q_UNUSED(connection);
QDBusConnectionPrivate *d = static_cast<QDBusConnectionPrivate *>(data);
static int slotId; // 0 is QObject::deleteLater()
if (!slotId) {
// it's ok to do this: there's no race condition because the store is atomic
// and we always set to the same value
slotId = QDBusConnectionPrivate::staticMetaObject.indexOfSlot("doDispatch()");
}
//qDBusDebug() << "Updating dispatcher status" << slotId;
if (new_status == DBUS_DISPATCH_DATA_REMAINS)
QDBusConnectionPrivate::staticMetaObject.method(slotId).
invoke(d, Qt::QueuedConnection);
}
static void qDBusNewConnection(DBusServer *server, DBusConnection *connection, void *data)
{
// ### We may want to separate the server from the QDBusConnectionPrivate
Q_ASSERT(server); Q_UNUSED(server);
Q_ASSERT(connection);
Q_ASSERT(data);
// keep the connection alive
q_dbus_connection_ref(connection);
QDBusConnectionPrivate *d = new QDBusConnectionPrivate;
// setConnection does the error handling for us
QDBusErrorInternal error;
d->setPeer(connection, error);
QDBusConnection retval = QDBusConnectionPrivate::q(d);
d->setBusService(retval);
//d->name = QString::number(reinterpret_cast<int>(d));
//d->setConnection(d->name, d);
// make QDBusServer emit the newConnection signal
QDBusConnectionPrivate *server_d = static_cast<QDBusConnectionPrivate *>(data);
server_d->serverConnection(retval);
}
} // extern "C"
static QByteArray buildMatchRule(const QString &service,
const QString &objectPath, const QString &interface,
const QString &member, const QStringList &argMatch, const QString & /*signature*/)
{
QString result = QLatin1String("type='signal',");
QString keyValue = QLatin1String("%1='%2',");
if (!service.isEmpty())
result += keyValue.arg(QLatin1String("sender"), service);
if (!objectPath.isEmpty())
result += keyValue.arg(QLatin1String("path"), objectPath);
if (!interface.isEmpty())
result += keyValue.arg(QLatin1String("interface"), interface);
if (!member.isEmpty())
result += keyValue.arg(QLatin1String("member"), member);
// add the argument string-matching now
if (!argMatch.isEmpty()) {
keyValue = QLatin1String("arg%1='%2',");
for (int i = 0; i < argMatch.count(); ++i)
if (!argMatch.at(i).isNull())
result += keyValue.arg(i).arg(argMatch.at(i));
}
result.chop(1); // remove ending comma
return result.toLatin1();
}
static bool findObject(const QDBusConnectionPrivate::ObjectTreeNode *root,
const QString &fullpath, int &usedLength,
QDBusConnectionPrivate::ObjectTreeNode &result)
{
int start = 0;
int length = fullpath.length();
if (fullpath.at(0) == QLatin1Char('/'))
start = 1;
// walk the object tree
const QDBusConnectionPrivate::ObjectTreeNode *node = root;
while (start < length && node && !(node->flags & QDBusConnection::ExportChildObjects)) {
int end = fullpath.indexOf(QLatin1Char('/'), start);
end = (end == -1 ? length : end);
QStringRef pathComponent(&fullpath, start, end - start);
QDBusConnectionPrivate::ObjectTreeNode::DataList::ConstIterator it =
qLowerBound(node->children.constBegin(), node->children.constEnd(), pathComponent);
if (it != node->children.constEnd() && it->name == pathComponent)
// match
node = it;
else
node = 0;
start = end + 1;
}
// found our object
usedLength = (start > length ? length : start);
if (node) {
if (node->obj || !node->children.isEmpty())
result = *node;
else
// there really is no object here
// we're just looking at an unused space in the QVector
node = 0;
}
return node;
}
static QObject *findChildObject(const QDBusConnectionPrivate::ObjectTreeNode *root,
const QString &fullpath, int start)
{
int length = fullpath.length();
// any object in the tree can tell us to switch to its own object tree:
const QDBusConnectionPrivate::ObjectTreeNode *node = root;
if (node && node->flags & QDBusConnection::ExportChildObjects) {
QObject *obj = node->obj;
while (obj) {
if (start >= length)
// we're at the correct level
return obj;
int pos = fullpath.indexOf(QLatin1Char('/'), start);
pos = (pos == -1 ? length : pos);
QStringRef pathComponent(&fullpath, start, pos - start);
const QObjectList children = obj->children();
// find a child with the proper name
QObject *next = 0;
QObjectList::ConstIterator it = children.constBegin();
QObjectList::ConstIterator end = children.constEnd();
for ( ; it != end; ++it)
if ((*it)->objectName() == pathComponent) {
next = *it;
break;
}
if (!next)
break;
obj = next;
start = pos + 1;
}
}
// object not found
return 0;
}
static bool shouldWatchService(const QString &service)
{
return !service.isEmpty() && !service.startsWith(QLatin1Char(':'));
}
extern Q_DBUS_EXPORT void qDBusAddSpyHook(QDBusSpyHook);
void qDBusAddSpyHook(QDBusSpyHook hook)
{
qDBusSpyHookList()->append(hook);
}
extern "C" {
static DBusHandlerResult
qDBusSignalFilter(DBusConnection *connection, DBusMessage *message, void *data)
{
Q_ASSERT(data);
Q_UNUSED(connection);
QDBusConnectionPrivate *d = static_cast<QDBusConnectionPrivate *>(data);
if (d->mode == QDBusConnectionPrivate::InvalidMode)
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
QDBusMessage amsg = QDBusMessagePrivate::fromDBusMessage(message, d->capabilities);
qDBusDebug() << d << "got message (signal):" << amsg;
return d->handleMessage(amsg) ?
DBUS_HANDLER_RESULT_HANDLED :
DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
}
bool QDBusConnectionPrivate::handleMessage(const QDBusMessage &amsg)
{
const QDBusSpyHookList *list = qDBusSpyHookList();
for (int i = 0; i < list->size(); ++i) {
qDBusDebug() << "calling the message spy hook";
(*(*list)[i])(amsg);
}
if (!ref)
return false;
switch (amsg.type()) {
case QDBusMessage::SignalMessage:
handleSignal(amsg);
// if there are any other filters in this DBusConnection,
// let them see the signal too
return false;
case QDBusMessage::MethodCallMessage:
handleObjectCall(amsg);
return true;
case QDBusMessage::ReplyMessage:
case QDBusMessage::ErrorMessage:
case QDBusMessage::InvalidMessage:
return false; // we don't handle those here
}
return false;
}
static void huntAndDestroy(QObject *needle, QDBusConnectionPrivate::ObjectTreeNode &haystack)
{
QDBusConnectionPrivate::ObjectTreeNode::DataList::Iterator it = haystack.children.begin();
QDBusConnectionPrivate::ObjectTreeNode::DataList::Iterator end = haystack.children.end();
for ( ; it != end; ++it)
huntAndDestroy(needle, *it);
if (needle == haystack.obj) {
haystack.obj = 0;
haystack.flags = 0;
}
}
static void huntAndEmit(DBusConnection *connection, DBusMessage *msg,
QObject *needle, const QDBusConnectionPrivate::ObjectTreeNode &haystack,
bool isScriptable, bool isAdaptor, const QString &path = QString())
{
QDBusConnectionPrivate::ObjectTreeNode::DataList::ConstIterator it = haystack.children.constBegin();
QDBusConnectionPrivate::ObjectTreeNode::DataList::ConstIterator end = haystack.children.constEnd();
for ( ; it != end; ++it)
huntAndEmit(connection, msg, needle, *it, isScriptable, isAdaptor, path + QLatin1Char('/') + it->name);
if (needle == haystack.obj) {
// is this a signal we should relay?
if (isAdaptor && (haystack.flags & QDBusConnection::ExportAdaptors) == 0)
return; // no: it comes from an adaptor and we're not exporting adaptors
else if (!isAdaptor) {
int mask = isScriptable
? QDBusConnection::ExportScriptableSignals
: QDBusConnection::ExportNonScriptableSignals;
if ((haystack.flags & mask) == 0)
return; // signal was not exported
}
QByteArray p = path.toLatin1();
if (p.isEmpty())
p = "/";
qDBusDebug() << QThread::currentThread() << "emitting signal at" << p;
DBusMessage *msg2 = q_dbus_message_copy(msg);
q_dbus_message_set_path(msg2, p);
q_dbus_connection_send(connection, msg2, 0);
q_dbus_message_unref(msg2);
}
}
static int findSlot(const QMetaObject *mo, const QByteArray &name, int flags,
const QString &signature_, QList<int>& metaTypes)
{
QByteArray msgSignature = signature_.toLatin1();
for (int idx = mo->methodCount() - 1 ; idx >= QObject::staticMetaObject.methodCount(); --idx) {
QMetaMethod mm = mo->method(idx);
// check access:
if (mm.access() != QMetaMethod::Public)
continue;
// check type:
if (mm.methodType() != QMetaMethod::Slot && mm.methodType() != QMetaMethod::Method)
continue;
// check name:
QByteArray slotname = mm.signature();
int paren = slotname.indexOf('(');
if (paren != name.length() || !slotname.startsWith(name))
continue;
int returnType = qDBusNameToTypeId(mm.typeName());
bool isAsync = qDBusCheckAsyncTag(mm.tag());
bool isScriptable = mm.attributes() & QMetaMethod::Scriptable;
// consistency check:
if (isAsync && returnType != QMetaType::Void)
continue;
int inputCount = qDBusParametersForMethod(mm, metaTypes);
if (inputCount == -1)
continue; // problem parsing
metaTypes[0] = returnType;
bool hasMessage = false;
if (inputCount > 0 &&
metaTypes.at(inputCount) == QDBusMetaTypeId::message) {
// "no input parameters" is allowed as long as the message meta type is there
hasMessage = true;
--inputCount;
}
// try to match the parameters
int i;
QByteArray reconstructedSignature;
for (i = 1; i <= inputCount; ++i) {
const char *typeSignature = QDBusMetaType::typeToSignature( metaTypes.at(i) );
if (!typeSignature)
break; // invalid
reconstructedSignature += typeSignature;
if (!msgSignature.startsWith(reconstructedSignature))
break;
}
if (reconstructedSignature != msgSignature)
continue; // we didn't match them all
if (hasMessage)
++i;
// make sure that the output parameters have signatures too
if (returnType != 0 && QDBusMetaType::typeToSignature(returnType) == 0)
continue;
bool ok = true;
for (int j = i; ok && j < metaTypes.count(); ++j)
if (QDBusMetaType::typeToSignature(metaTypes.at(i)) == 0)
ok = false;
if (!ok)
continue;
// consistency check:
if (isAsync && metaTypes.count() > i + 1)
continue;
if (mm.methodType() == QMetaMethod::Slot) {
if (isScriptable && (flags & QDBusConnection::ExportScriptableSlots) == 0)
continue; // scriptable slots not exported
if (!isScriptable && (flags & QDBusConnection::ExportNonScriptableSlots) == 0)
continue; // non-scriptable slots not exported
} else {
if (isScriptable && (flags & QDBusConnection::ExportScriptableInvokables) == 0)
continue; // scriptable invokables not exported
if (!isScriptable && (flags & QDBusConnection::ExportNonScriptableInvokables) == 0)
continue; // non-scriptable invokables not exported
}
// if we got here, this slot matched
return idx;
}
// no slot matched
return -1;
}
static QDBusCallDeliveryEvent * const DIRECT_DELIVERY = (QDBusCallDeliveryEvent *)1;
QDBusCallDeliveryEvent* QDBusConnectionPrivate::prepareReply(QDBusConnectionPrivate *target,
QObject *object, int idx,
const QList<int> &metaTypes,
const QDBusMessage &msg)
{
Q_ASSERT(object);
Q_UNUSED(object);
int n = metaTypes.count() - 1;
if (metaTypes[n] == QDBusMetaTypeId::message)
--n;
if (msg.arguments().count() < n)
return 0; // too few arguments
// check that types match
for (int i = 0; i < n; ++i)
if (metaTypes.at(i + 1) != msg.arguments().at(i).userType() &&
msg.arguments().at(i).userType() != qMetaTypeId<QDBusArgument>())
return 0; // no match
// we can deliver
// prepare for the call
if (target == object)
return DIRECT_DELIVERY;
return new QDBusCallDeliveryEvent(QDBusConnection(target), idx, target, msg, metaTypes);
}
void QDBusConnectionPrivate::activateSignal(const QDBusConnectionPrivate::SignalHook& hook,
const QDBusMessage &msg)
{
// This is called by QDBusConnectionPrivate::handleSignal to deliver a signal
// that was received from D-Bus
//
// Signals are delivered to slots if the parameters match
// Slots can have less parameters than there are on the message
// Slots can optionally have one final parameter that is a QDBusMessage
// Slots receive read-only copies of the message (i.e., pass by value or by const-ref)
QDBusCallDeliveryEvent *call = prepareReply(this, hook.obj, hook.midx, hook.params, msg);
if (call == DIRECT_DELIVERY) {
// short-circuit delivery
Q_ASSERT(this == hook.obj);
deliverCall(this, 0, msg, hook.params, hook.midx);
return;
}
if (call)
postEventToThread(ActivateSignalAction, hook.obj, call);
}
bool QDBusConnectionPrivate::activateCall(QObject* object, int flags, const QDBusMessage &msg)
{
// This is called by QDBusConnectionPrivate::handleObjectCall to place a call
// to a slot on the object.
//
// The call is delivered to the first slot that matches the following conditions:
// - has the same name as the message's target member
// - ALL of the message's types are found in slot's parameter list
// - optionally has one more parameter of type QDBusMessage
// If none match, then the slot of the same name as the message target and with
// the first type of QDBusMessage is delivered.
//
// The D-Bus specification requires that all MethodCall messages be replied to, unless the
// caller specifically waived this requirement. This means that we inspect if the user slot
// generated a reply and, if it didn't, we will. Obviously, if the user slot doesn't take a
// QDBusMessage parameter, it cannot generate a reply.
//
// When a return message is generated, the slot's return type, if any, will be placed
// in the message's first position. If there are non-const reference parameters to the
// slot, they must appear at the end and will be placed in the subsequent message
// positions.
static const char cachePropertyName[] = "_qdbus_slotCache";
if (!object)
return false;
#ifndef QT_NO_PROPERTIES
Q_ASSERT_X(QThread::currentThread() == object->thread(),
"QDBusConnection: internal threading error",
"function called for an object that is in another thread!!");
QDBusSlotCache slotCache =
qvariant_cast<QDBusSlotCache>(object->property(cachePropertyName));
QString cacheKey = msg.member(), signature = msg.signature();
if (!signature.isEmpty()) {
cacheKey.reserve(cacheKey.length() + 1 + signature.length());
cacheKey += QLatin1Char('.');
cacheKey += signature;
}
QDBusSlotCache::Hash::ConstIterator cacheIt = slotCache.hash.constFind(cacheKey);
while (cacheIt != slotCache.hash.constEnd() && cacheIt->flags != flags &&
cacheIt.key() == cacheKey)
++cacheIt;
if (cacheIt == slotCache.hash.constEnd() || cacheIt.key() != cacheKey)
{
// not cached, analyze the meta object
const QMetaObject *mo = object->metaObject();
QByteArray memberName = msg.member().toUtf8();
// find a slot that matches according to the rules above
QDBusSlotCache::Data slotData;
slotData.flags = flags;
slotData.slotIdx = ::findSlot(mo, memberName, flags, msg.signature(), slotData.metaTypes);
if (slotData.slotIdx == -1) {
// ### this is where we want to add the connection as an arg too
// try with no parameters, but with a QDBusMessage
slotData.slotIdx = ::findSlot(mo, memberName, flags, QString(), slotData.metaTypes);
if (slotData.metaTypes.count() != 2 ||
slotData.metaTypes.at(1) != QDBusMetaTypeId::message) {
// not found
// save the negative lookup
slotData.slotIdx = -1;
slotData.metaTypes.clear();
slotCache.hash.insert(cacheKey, slotData);
object->setProperty(cachePropertyName, QVariant::fromValue(slotCache));
return false;
}
}
// save to the cache
slotCache.hash.insert(cacheKey, slotData);
object->setProperty(cachePropertyName, QVariant::fromValue(slotCache));
// found the slot to be called
deliverCall(object, flags, msg, slotData.metaTypes, slotData.slotIdx);
return true;
} else if (cacheIt->slotIdx == -1) {
// negative cache
return false;
} else {
// use the cache
deliverCall(object, flags, msg, cacheIt->metaTypes, cacheIt->slotIdx);
return true;
}
#endif // QT_NO_PROPERTIES
return false;
}
void QDBusConnectionPrivate::deliverCall(QObject *object, int /*flags*/, const QDBusMessage &msg,
const QList<int> &metaTypes, int slotIdx)
{
Q_ASSERT_X(!object || QThread::currentThread() == object->thread(),
"QDBusConnection: internal threading error",
"function called for an object that is in another thread!!");
QVarLengthArray<void *, 10> params;
params.reserve(metaTypes.count());
QVariantList auxParameters;
// let's create the parameter list
// first one is the return type -- add it below
params.append(0);
// add the input parameters
int i;
int pCount = qMin(msg.arguments().count(), metaTypes.count() - 1);
for (i = 1; i <= pCount; ++i) {
int id = metaTypes[i];
if (id == QDBusMetaTypeId::message)
break;
const QVariant &arg = msg.arguments().at(i - 1);
if (arg.userType() == id)
// no conversion needed
params.append(const_cast<void *>(arg.constData()));
else if (arg.userType() == qMetaTypeId<QDBusArgument>()) {
// convert to what the function expects
void *null = 0;
auxParameters.append(QVariant(id, null));
const QDBusArgument &in =
*reinterpret_cast<const QDBusArgument *>(arg.constData());
QVariant &out = auxParameters[auxParameters.count() - 1];
if (!QDBusMetaType::demarshall(in, out.userType(), out.data()))
qFatal("Internal error: demarshalling function for type '%s' (%d) failed!",
out.typeName(), out.userType());
params.append(const_cast<void *>(out.constData()));
} else {
qFatal("Internal error: got invalid meta type %d (%s) "
"when trying to convert to meta type %d (%s)",
arg.userType(), QMetaType::typeName(arg.userType()),
id, QMetaType::typeName(id));
}
}
bool takesMessage = false;
if (metaTypes.count() > i && metaTypes[i] == QDBusMetaTypeId::message) {
params.append(const_cast<void*>(static_cast<const void*>(&msg)));
takesMessage = true;
++i;
}
// output arguments
QVariantList outputArgs;
void *null = 0;
if (metaTypes[0] != QMetaType::Void) {
QVariant arg(metaTypes[0], null);
outputArgs.append( arg );
params[0] = const_cast<void*>(outputArgs.at( outputArgs.count() - 1 ).constData());
}
for ( ; i < metaTypes.count(); ++i) {
QVariant arg(metaTypes[i], null);
outputArgs.append( arg );
params.append(const_cast<void*>(outputArgs.at( outputArgs.count() - 1 ).constData()));
}
// make call:
bool fail;
if (!object) {
fail = true;
} else {
// FIXME: save the old sender!
QDBusContextPrivate context(QDBusConnection(this), msg);
QDBusContextPrivate *old = QDBusContextPrivate::set(object, &context);
QDBusConnectionPrivate::setSender(this);
QPointer<QObject> ptr = object;
fail = object->qt_metacall(QMetaObject::InvokeMetaMethod,
slotIdx, params.data()) >= 0;
QDBusConnectionPrivate::setSender(0);
// the object might be deleted in the slot
if (!ptr.isNull())
QDBusContextPrivate::set(object, old);
}
// do we create a reply? Only if the caller is waiting for a reply and one hasn't been sent
// yet.
if (msg.isReplyRequired() && !msg.isDelayedReply()) {
if (!fail) {
// normal reply
qDBusDebug() << this << "Automatically sending reply:" << outputArgs;
send(msg.createReply(outputArgs));
} else {
// generate internal error
qWarning("Internal error: Failed to deliver message");
send(msg.createErrorReply(QDBusError::InternalError,
QLatin1String("Failed to deliver message")));
}
}
return;
}
extern bool qDBusInitThreads();
QDBusConnectionPrivate::QDBusConnectionPrivate(QObject *p)
: QObject(p), ref(1), capabilities(0), mode(InvalidMode), connection(0), server(0), busService(0),
watchAndTimeoutLock(QMutex::Recursive),
rootNode(QString(QLatin1Char('/')))
{
static const bool threads = q_dbus_threads_init_default();
static const int debugging = qgetenv("QDBUS_DEBUG").toInt();
::isDebugging = debugging;
Q_UNUSED(threads)
Q_UNUSED(debugging)
#ifdef QDBUS_THREAD_DEBUG
if (debugging > 1)
qdbusThreadDebug = qdbusDefaultThreadDebug;
#endif
QDBusMetaTypeId::init();
rootNode.flags = 0;
// prepopulate watchedServices:
// we know that the owner of org.freedesktop.DBus is itself
watchedServices.insert(dbusServiceString(), WatchedServiceData(dbusServiceString(), 1));
// prepopulate matchRefCounts:
// we know that org.freedesktop.DBus will never change owners
matchRefCounts.insert("type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged',arg0='org.freedesktop.DBus'", 1);
}
QDBusConnectionPrivate::~QDBusConnectionPrivate()
{
if (thread() && thread() != QThread::currentThread())
qWarning("QDBusConnection(name=\"%s\")'s last reference in not in its creation thread! "
"Timer and socket errors will follow and the program will probably crash",
qPrintable(name));
closeConnection();
rootNode.children.clear(); // free resources
qDeleteAll(cachedMetaObjects);
if (server)
q_dbus_server_unref(server);
if (connection)
q_dbus_connection_unref(connection);
connection = 0;
server = 0;
}
void QDBusConnectionPrivate::deleteYourself()
{
if (thread() && thread() != QThread::currentThread()) {
// last reference dropped while not in the correct thread
// ask the correct thread to delete
// note: since we're posting an event to another thread, we
// must consider deleteLater() to take effect immediately
deleteLater();
} else {
delete this;
}
}
void QDBusConnectionPrivate::closeConnection()
{
QDBusWriteLocker locker(CloseConnectionAction, this);
ConnectionMode oldMode = mode;
mode = InvalidMode; // prevent reentrancy
baseService.clear();
if (oldMode == ServerMode) {
if (server) {
q_dbus_server_disconnect(server);
}
} else if (oldMode == ClientMode || oldMode == PeerMode) {
if (connection) {
q_dbus_connection_close(connection);
// send the "close" message
while (q_dbus_connection_dispatch(connection) == DBUS_DISPATCH_DATA_REMAINS)
;
}
}
}
void QDBusConnectionPrivate::checkThread()
{
if (!thread()) {
if (QCoreApplication::instance())
moveToThread(QCoreApplication::instance()->thread());
else
qWarning("The thread that had QDBusConnection('%s') has died and there is no main thread",
qPrintable(name));
}
}
bool QDBusConnectionPrivate::handleError(const QDBusErrorInternal &error)
{
if (!error)
return false; // no error
//lock.lockForWrite();
lastError = error;
//lock.unlock();
return true;
}
void QDBusConnectionPrivate::timerEvent(QTimerEvent *e)
{
{
QDBusWatchAndTimeoutLocker locker(TimerEventAction, this);
DBusTimeout *timeout = timeouts.value(e->timerId(), 0);
if (timeout)
q_dbus_timeout_handle(timeout);
}
doDispatch();
}
void QDBusConnectionPrivate::customEvent(QEvent *e)
{
Q_ASSERT(e->type() == QEvent::User);
QDBusConnectionCallbackEvent *ev = static_cast<QDBusConnectionCallbackEvent *>(e);
QDBusLockerBase::reportThreadAction(int(AddTimeoutAction) + int(ev->subtype),
QDBusLockerBase::BeforeDeliver, this);
switch (ev->subtype)
{
case QDBusConnectionCallbackEvent::AddTimeout: {
QDBusWatchAndTimeoutLocker locker(RealAddTimeoutAction, this);
while (!timeoutsPendingAdd.isEmpty()) {
QPair<DBusTimeout *, int> entry = timeoutsPendingAdd.takeFirst();
qDBusRealAddTimeout(this, entry.first, entry.second);
}
break;
}
case QDBusConnectionCallbackEvent::KillTimer:
killTimer(ev->timerId);
break;
case QDBusConnectionCallbackEvent::AddWatch:
qDBusRealAddWatch(this, ev->watch, ev->extra, ev->fd);
break;
case QDBusConnectionCallbackEvent::ToggleWatch:
qDBusRealToggleWatch(this, ev->watch, ev->fd);
break;
}
QDBusLockerBase::reportThreadAction(int(AddTimeoutAction) + int(ev->subtype),
QDBusLockerBase::AfterDeliver, this);
}
void QDBusConnectionPrivate::doDispatch()
{
QDBusDispatchLocker locker(DoDispatchAction, this);
if (mode == ClientMode || mode == PeerMode)
while (q_dbus_connection_dispatch(connection) == DBUS_DISPATCH_DATA_REMAINS) ;
}
void QDBusConnectionPrivate::socketRead(int fd)
{
QVarLengthArray<DBusWatch *, 2> pendingWatches;
{
QDBusWatchAndTimeoutLocker locker(SocketReadAction, this);
WatcherHash::ConstIterator it = watchers.constFind(fd);
while (it != watchers.constEnd() && it.key() == fd) {
if (it->watch && it->read && it->read->isEnabled())
pendingWatches.append(it.value().watch);
++it;
}
}
for (int i = 0; i < pendingWatches.size(); ++i)
if (!q_dbus_watch_handle(pendingWatches[i], DBUS_WATCH_READABLE))
qDebug("OUT OF MEM");
doDispatch();
}
void QDBusConnectionPrivate::socketWrite(int fd)
{
QVarLengthArray<DBusWatch *, 2> pendingWatches;
{
QDBusWatchAndTimeoutLocker locker(SocketWriteAction, this);
WatcherHash::ConstIterator it = watchers.constFind(fd);
while (it != watchers.constEnd() && it.key() == fd) {
if (it->watch && it->write && it->write->isEnabled())
pendingWatches.append(it.value().watch);
++it;
}
}
for (int i = 0; i < pendingWatches.size(); ++i)
if (!q_dbus_watch_handle(pendingWatches[i], DBUS_WATCH_WRITABLE))
qDebug("OUT OF MEM");
}
void QDBusConnectionPrivate::objectDestroyed(QObject *obj)
{
QDBusWriteLocker locker(ObjectDestroyedAction, this);
huntAndDestroy(obj, rootNode);
SignalHookHash::iterator sit = signalHooks.begin();
while (sit != signalHooks.end()) {
if (static_cast<QObject *>(sit.value().obj) == obj)
sit = disconnectSignal(sit);
else
++sit;
}
obj->disconnect(this);
}
void QDBusConnectionPrivate::relaySignal(QObject *obj, const QMetaObject *mo, int signalId,
const QVariantList &args)
{
QString interface = qDBusInterfaceFromMetaObject(mo);
QMetaMethod mm = mo->method(signalId);
QByteArray memberName = mm.signature();
memberName.truncate(memberName.indexOf('('));
// check if it's scriptable
bool isScriptable = mm.attributes() & QMetaMethod::Scriptable;
bool isAdaptor = false;
for ( ; mo; mo = mo->superClass())
if (mo == &QDBusAbstractAdaptor::staticMetaObject) {
isAdaptor = true;
break;
}
QDBusReadLocker locker(RelaySignalAction, this);
QDBusMessage message = QDBusMessage::createSignal(QLatin1String("/"), interface,
QLatin1String(memberName));
QDBusMessagePrivate::setParametersValidated(message, true);
message.setArguments(args);
QDBusError error;
DBusMessage *msg = QDBusMessagePrivate::toDBusMessage(message, capabilities, &error);
if (!msg) {
qWarning("QDBusConnection: Could not emit signal %s.%s: %s", qPrintable(interface), memberName.constData(),
qPrintable(error.message()));
lastError = error;
return;
}
//qDBusDebug() << "Emitting signal" << message;
//qDBusDebug() << "for paths:";
q_dbus_message_set_no_reply(msg, true); // the reply would not be delivered to anything
huntAndEmit(connection, msg, obj, rootNode, isScriptable, isAdaptor);
q_dbus_message_unref(msg);
}
void QDBusConnectionPrivate::serviceOwnerChangedNoLock(const QString &name,
const QString &oldOwner, const QString &newOwner)
{
Q_UNUSED(oldOwner);
// QDBusWriteLocker locker(UpdateSignalHookOwnerAction, this);
WatchedServicesHash::Iterator it = watchedServices.find(name);
if (it == watchedServices.end())
return;
if (oldOwner != it->owner)
qWarning("QDBusConnection: name '%s' had owner '%s' but we thought it was '%s'",
qPrintable(name), qPrintable(oldOwner), qPrintable(it->owner));
qDBusDebug() << this << "Updating name" << name << "from" << oldOwner << "to" << newOwner;
it->owner = newOwner;
}
int QDBusConnectionPrivate::findSlot(QObject* obj, const QByteArray &normalizedName,
QList<int> ¶ms)
{
int midx = obj->metaObject()->indexOfMethod(normalizedName);
if (midx == -1)
return -1;
int inputCount = qDBusParametersForMethod(obj->metaObject()->method(midx), params);
if ( inputCount == -1 || inputCount + 1 != params.count() )
return -1; // failed to parse or invalid arguments or output arguments
return midx;
}
bool QDBusConnectionPrivate::prepareHook(QDBusConnectionPrivate::SignalHook &hook, QString &key,
const QString &service,
const QString &path, const QString &interface, const QString &name,
const QStringList &argMatch,
QObject *receiver, const char *signal, int minMIdx,
bool buildSignature)
{
QByteArray normalizedName = signal + 1;
hook.midx = findSlot(receiver, signal + 1, hook.params);
if (hook.midx == -1) {
normalizedName = QMetaObject::normalizedSignature(signal + 1);
hook.midx = findSlot(receiver, normalizedName, hook.params);
}
if (hook.midx < minMIdx) {
if (hook.midx == -1)
{}
return false;
}
hook.service = service;
hook.path = path;
hook.obj = receiver;
hook.argumentMatch = argMatch;
// build the D-Bus signal name and signature
// This should not happen for QDBusConnection::connect, use buildSignature here, since
// QDBusConnection::connect passes false and everything else uses true
QString mname = name;
if (buildSignature && mname.isNull()) {
normalizedName.truncate(normalizedName.indexOf('('));
mname = QString::fromUtf8(normalizedName);
}
key = mname;
key.reserve(interface.length() + 1 + mname.length());
key += QLatin1Char(':');
key += interface;
if (buildSignature) {
hook.signature.clear();
for (int i = 1; i < hook.params.count(); ++i)
if (hook.params.at(i) != QDBusMetaTypeId::message)
hook.signature += QLatin1String( QDBusMetaType::typeToSignature( hook.params.at(i) ) );
}
hook.matchRule = buildMatchRule(service, path, interface, mname, argMatch, hook.signature);
return true; // connect to this signal
}
void QDBusConnectionPrivate::sendError(const QDBusMessage &msg, QDBusError::ErrorType code)
{
if (code == QDBusError::UnknownMethod) {
QString interfaceMsg;
if (msg.interface().isEmpty())
interfaceMsg = QLatin1String("any interface");
else
interfaceMsg = QString::fromLatin1("interface '%1'").arg(msg.interface());
send(msg.createErrorReply(code,
QString::fromLatin1("No such method '%1' in %2 at object path '%3' "
"(signature '%4')")
.arg(msg.member(), interfaceMsg, msg.path(), msg.signature())));
} else if (code == QDBusError::UnknownInterface) {
send(msg.createErrorReply(QDBusError::UnknownInterface,
QString::fromLatin1("No such interface '%1' at object path '%2'")
.arg(msg.interface(), msg.path())));
} else if (code == QDBusError::UnknownObject) {
send(msg.createErrorReply(QDBusError::UnknownObject,
QString::fromLatin1("No such object path '%1'").arg(msg.path())));
}
}
bool QDBusConnectionPrivate::activateInternalFilters(const ObjectTreeNode &node,
const QDBusMessage &msg)
{
// object may be null
const QString interface = msg.interface();
if (interface.isEmpty() || interface == QLatin1String(DBUS_INTERFACE_INTROSPECTABLE)) {
if (msg.member() == QLatin1String("Introspect") && msg.signature().isEmpty()) {
//qDebug() << "QDBusConnectionPrivate::activateInternalFilters introspect" << msg.d_ptr->msg;
QDBusMessage reply = msg.createReply(qDBusIntrospectObject(node));
send(reply);
return true;
}
if (!interface.isEmpty()) {
sendError(msg, QDBusError::UnknownMethod);
return true;
}
}
if (node.obj && (interface.isEmpty() ||
interface == QLatin1String(DBUS_INTERFACE_PROPERTIES))) {
//qDebug() << "QDBusConnectionPrivate::activateInternalFilters properties" << msg.d_ptr->msg;
if (msg.member() == QLatin1String("Get") && msg.signature() == QLatin1String("ss")) {
QDBusMessage reply = qDBusPropertyGet(node, msg);
send(reply);
return true;
} else if (msg.member() == QLatin1String("Set") && msg.signature() == QLatin1String("ssv")) {
QDBusMessage reply = qDBusPropertySet(node, msg);
send(reply);
return true;
} else if (msg.member() == QLatin1String("GetAll") && msg.signature() == QLatin1String("s")) {
QDBusMessage reply = qDBusPropertyGetAll(node, msg);
send(reply);
return true;
}
if (!interface.isEmpty()) {
sendError(msg, QDBusError::UnknownMethod);
return true;
}
}
return false;
}
void QDBusConnectionPrivate::activateObject(ObjectTreeNode &node, const QDBusMessage &msg,
int pathStartPos)
{
// This is called by QDBusConnectionPrivate::handleObjectCall to place a call to a slot
// on the object.
//
// The call is routed through the adaptor sub-objects if we have any
// object may be null
if (pathStartPos != msg.path().length()) {
node.flags &= ~QDBusConnection::ExportAllSignals;
node.obj = findChildObject(&node, msg.path(), pathStartPos);
if (!node.obj) {
sendError(msg, QDBusError::UnknownObject);
return;
}
}
QDBusAdaptorConnector *connector;
if (node.flags & QDBusConnection::ExportAdaptors &&
(connector = qDBusFindAdaptorConnector(node.obj))) {
int newflags = node.flags | QDBusConnection::ExportAllSlots;
if (msg.interface().isEmpty()) {
// place the call in all interfaces
// let the first one that handles it to work
QDBusAdaptorConnector::AdaptorMap::ConstIterator it =
connector->adaptors.constBegin();
QDBusAdaptorConnector::AdaptorMap::ConstIterator end =
connector->adaptors.constEnd();
for ( ; it != end; ++it)
if (activateCall(it->adaptor, newflags, msg))
return;
} else {
// check if we have an interface matching the name that was asked:
QDBusAdaptorConnector::AdaptorMap::ConstIterator it;
it = qLowerBound(connector->adaptors.constBegin(), connector->adaptors.constEnd(),
msg.interface());
if (it != connector->adaptors.constEnd() && msg.interface() == QLatin1String(it->interface)) {
if (!activateCall(it->adaptor, newflags, msg))
sendError(msg, QDBusError::UnknownMethod);
return;
}
}
}
// no adaptors matched or were exported
// try our standard filters
if (activateInternalFilters(node, msg))
return; // internal filters have already run or an error has been sent
// try the object itself:
if (node.flags & (QDBusConnection::ExportScriptableSlots|QDBusConnection::ExportNonScriptableSlots) ||
node.flags & (QDBusConnection::ExportScriptableInvokables|QDBusConnection::ExportNonScriptableInvokables)) {
bool interfaceFound = true;
if (!msg.interface().isEmpty())
interfaceFound = qDBusInterfaceInObject(node.obj, msg.interface());
if (interfaceFound) {
if (!activateCall(node.obj, node.flags, msg))
sendError(msg, QDBusError::UnknownMethod);
return;
}
}
// nothing matched, send an error code
if (msg.interface().isEmpty())
sendError(msg, QDBusError::UnknownMethod);
else
sendError(msg, QDBusError::UnknownInterface);
}
void QDBusConnectionPrivate::handleObjectCall(const QDBusMessage &msg)
{
// if the msg is external, we were called from inside doDispatch
// that means the dispatchLock mutex is locked
// must not call out to user code in that case
//
// however, if the message is internal, handleMessage was called
// directly and no lock is in place. We can therefore call out to
// user code, if necessary
ObjectTreeNode result;
int usedLength;
QThread *objThread = 0;
QSemaphore sem;
bool semWait;
{
QDBusReadLocker locker(HandleObjectCallAction, this);
if (!findObject(&rootNode, msg.path(), usedLength, result)) {
// qDebug("Call failed: no object found at %s", qPrintable(msg.path()));
sendError(msg, QDBusError::UnknownObject);
return;
}
if (!result.obj) {
// no object -> no threading issues
// it's either going to be an error, or an internal filter
activateObject(result, msg, usedLength);
return;
}
objThread = result.obj->thread();
if (!objThread) {
send(msg.createErrorReply(QDBusError::InternalError,
QString::fromLatin1("Object '%1' (at path '%2')"
" has no thread. Cannot deliver message.")
.arg(result.obj->objectName(), msg.path())));
return;
}
if (!QDBusMessagePrivate::isLocal(msg)) {
// external incoming message
// post it and forget
postEventToThread(HandleObjectCallPostEventAction, result.obj,
new QDBusActivateObjectEvent(QDBusConnection(this), this, result,
usedLength, msg));
return;
} else if (objThread != QThread::currentThread()) {
// synchronize with other thread
postEventToThread(HandleObjectCallPostEventAction, result.obj,
new QDBusActivateObjectEvent(QDBusConnection(this), this, result,
usedLength, msg, &sem));
semWait = true;
} else {
semWait = false;
}
} // release the lock
if (semWait)
SEM_ACQUIRE(HandleObjectCallSemaphoreAction, sem);
else
activateObject(result, msg, usedLength);
}
QDBusActivateObjectEvent::~QDBusActivateObjectEvent()
{
if (!handled) {
// we're being destroyed without delivering
// it means the object was deleted between posting and delivering
QDBusConnectionPrivate *that = QDBusConnectionPrivate::d(connection);
that->sendError(message, QDBusError::UnknownObject);
}
// semaphore releasing happens in ~QMetaCallEvent
}
int QDBusActivateObjectEvent::placeMetaCall(QObject *)
{
QDBusConnectionPrivate *that = QDBusConnectionPrivate::d(connection);
QDBusLockerBase::reportThreadAction(HandleObjectCallPostEventAction,
QDBusLockerBase::BeforeDeliver, that);
that->activateObject(node, message, pathStartPos);
QDBusLockerBase::reportThreadAction(HandleObjectCallPostEventAction,
QDBusLockerBase::AfterDeliver, that);
handled = true;
return -1;
}
void QDBusConnectionPrivate::handleSignal(const QString &key, const QDBusMessage& msg)
{
SignalHookHash::const_iterator it = signalHooks.find(key);
SignalHookHash::const_iterator end = signalHooks.constEnd();
//qDebug("looking for: %s", path.toLocal8Bit().constData());
//qDBusDebug() << signalHooks.keys();
for ( ; it != end && it.key() == key; ++it) {
const SignalHook &hook = it.value();
if (!hook.service.isEmpty()) {
const QString owner =
shouldWatchService(hook.service) ?
watchedServices.value(hook.service).owner :
hook.service;
if (owner != msg.service())
continue;
}
if (!hook.path.isEmpty() && hook.path != msg.path())
continue;
if (!hook.signature.isEmpty() && hook.signature != msg.signature())
continue;
if (hook.signature.isEmpty() && !hook.signature.isNull() && !msg.signature().isEmpty())
continue;
if (!hook.argumentMatch.isEmpty()) {
const QVariantList arguments = msg.arguments();
if (hook.argumentMatch.size() > arguments.size())
continue;
bool matched = true;
for (int i = 0; i < hook.argumentMatch.size(); ++i) {
const QString ¶m = hook.argumentMatch.at(i);
if (param.isNull())
continue; // don't try to match against this
if (param == arguments.at(i).toString())
continue; // matched
matched = false;
break;
}
if (!matched)
continue;
}
activateSignal(hook, msg);
}
}
void QDBusConnectionPrivate::handleSignal(const QDBusMessage& msg)
{
// We call handlesignal(QString, QDBusMessage) three times:
// one with member:interface
// one with member:
// one with :interface
// This allows us to match signals with wildcards on member or interface
// (but not both)
QString key = msg.member();
key.reserve(key.length() + 1 + msg.interface().length());
key += QLatin1Char(':');
key += msg.interface();
QDBusReadLocker locker(HandleSignalAction, this);
handleSignal(key, msg); // one try
key.truncate(msg.member().length() + 1); // keep the ':'
handleSignal(key, msg); // second try
key = QLatin1Char(':');
key += msg.interface();
handleSignal(key, msg); // third try
}
static dbus_int32_t server_slot = -1;
void QDBusConnectionPrivate::setServer(DBusServer *s, const QDBusErrorInternal &error)
{
if (!s) {
handleError(error);
return;
}
server = s;
mode = ServerMode;
dbus_bool_t data_allocated = q_dbus_server_allocate_data_slot(&server_slot);
if (data_allocated && server_slot < 0)
return;
dbus_bool_t watch_functions_set = q_dbus_server_set_watch_functions(server,
qDBusAddWatch,
qDBusRemoveWatch,
qDBusToggleWatch,
this, 0);
//qDebug() << "watch_functions_set" << watch_functions_set;
Q_UNUSED(watch_functions_set);
dbus_bool_t time_functions_set = q_dbus_server_set_timeout_functions(server,
qDBusAddTimeout,
qDBusRemoveTimeout,
qDBusToggleTimeout,
this, 0);
//qDebug() << "time_functions_set" << time_functions_set;
Q_UNUSED(time_functions_set);
q_dbus_server_set_new_connection_function(server, qDBusNewConnection, this, 0);
dbus_bool_t data_set = q_dbus_server_set_data(server, server_slot, this, 0);
//qDebug() << "data_set" << data_set;
Q_UNUSED(data_set);
}
void QDBusConnectionPrivate::setPeer(DBusConnection *c, const QDBusErrorInternal &error)
{
if (!c) {
handleError(error);
return;
}
connection = c;
mode = PeerMode;
q_dbus_connection_set_exit_on_disconnect(connection, false);
q_dbus_connection_set_watch_functions(connection,
qDBusAddWatch,
qDBusRemoveWatch,
qDBusToggleWatch,
this, 0);
q_dbus_connection_set_timeout_functions(connection,
qDBusAddTimeout,
qDBusRemoveTimeout,
qDBusToggleTimeout,
this, 0);
q_dbus_connection_set_dispatch_status_function(connection, qDBusUpdateDispatchStatus, this, 0);
q_dbus_connection_add_filter(connection,
qDBusSignalFilter,
this, 0);
QMetaObject::invokeMethod(this, "doDispatch", Qt::QueuedConnection);
}
static QDBusConnection::ConnectionCapabilities connectionCapabilies(DBusConnection *connection)
{
QDBusConnection::ConnectionCapabilities result = 0;
#if defined(QT_LINKED_LIBDBUS) && DBUS_VERSION < 0x010400
// no capabilities are possible
#else
# if !defined(QT_LINKED_LIBDBUS)
// run-time check if the next functions are available
int major, minor, micro;
q_dbus_get_version(&major, &minor, µ);
if (major == 1 && minor < 4)
return result;
# endif
if (q_dbus_connection_can_send_type(connection, DBUS_TYPE_UNIX_FD))
result |= QDBusConnection::UnixFileDescriptorPassing;
#endif
return result;
}
void QDBusConnectionPrivate::setConnection(DBusConnection *dbc, const QDBusErrorInternal &error)
{
if (!dbc) {
handleError(error);
return;
}
connection = dbc;
mode = ClientMode;
const char *service = q_dbus_bus_get_unique_name(connection);
Q_ASSERT(service);
baseService = QString::fromUtf8(service);
capabilities = connectionCapabilies(connection);
q_dbus_connection_set_exit_on_disconnect(connection, false);
q_dbus_connection_set_watch_functions(connection, qDBusAddWatch, qDBusRemoveWatch,
qDBusToggleWatch, this, 0);
q_dbus_connection_set_timeout_functions(connection, qDBusAddTimeout, qDBusRemoveTimeout,
qDBusToggleTimeout, this, 0);
q_dbus_connection_set_dispatch_status_function(connection, qDBusUpdateDispatchStatus, this, 0);
q_dbus_connection_add_filter(connection, qDBusSignalFilter, this, 0);
// Initialize the hooks for the NameAcquired and NameLost signals
// we don't use connectSignal here because we don't need the rules to be sent to the bus
// the bus will always send us these two signals
SignalHook hook;
hook.service = dbusServiceString();
hook.path.clear(); // no matching
hook.obj = this;
hook.params << QMetaType::Void << QVariant::String; // both functions take a QString as parameter and return void
hook.midx = staticMetaObject.indexOfSlot("registerServiceNoLock(QString)");
Q_ASSERT(hook.midx != -1);
signalHooks.insert(QLatin1String("NameAcquired:" DBUS_INTERFACE_DBUS), hook);
hook.midx = staticMetaObject.indexOfSlot("unregisterServiceNoLock(QString)");
Q_ASSERT(hook.midx != -1);
signalHooks.insert(QLatin1String("NameLost:" DBUS_INTERFACE_DBUS), hook);
qDBusDebug() << this << ": connected successfully";
// schedule a dispatch:
QMetaObject::invokeMethod(this, "doDispatch", Qt::QueuedConnection);
}
extern "C"{
static void qDBusResultReceived(DBusPendingCall *pending, void *user_data)
{
QDBusPendingCallPrivate *call = reinterpret_cast<QDBusPendingCallPrivate *>(user_data);
Q_ASSERT(call->pending == pending);
Q_UNUSED(pending);
QDBusConnectionPrivate::processFinishedCall(call);
}
}
void QDBusConnectionPrivate::waitForFinished(QDBusPendingCallPrivate *pcall)
{
Q_ASSERT(pcall->pending);
Q_ASSERT(!pcall->autoDelete);
//Q_ASSERT(pcall->mutex.isLocked()); // there's no such function
if (pcall->waitingForFinished) {
// another thread is already waiting
pcall->waitForFinishedCondition.wait(&pcall->mutex);
} else {
pcall->waitingForFinished = true;
pcall->mutex.unlock();
{
QDBusDispatchLocker locker(PendingCallBlockAction, this);
q_dbus_pending_call_block(pcall->pending);
// QDBusConnectionPrivate::processFinishedCall() is called automatically
}
pcall->mutex.lock();
}
}
void QDBusConnectionPrivate::processFinishedCall(QDBusPendingCallPrivate *call)
{
QDBusConnectionPrivate *connection = const_cast<QDBusConnectionPrivate *>(call->connection);
QMutexLocker locker(&call->mutex);
QDBusMessage &msg = call->replyMessage;
if (call->pending) {
// decode the message
DBusMessage *reply = q_dbus_pending_call_steal_reply(call->pending);
msg = QDBusMessagePrivate::fromDBusMessage(reply, connection->capabilities);
q_dbus_message_unref(reply);
}
qDBusDebug() << connection << "got message reply (async):" << msg;
// Check if the reply has the expected signature
call->checkReceivedSignature();
if (!call->receiver.isNull() && call->methodIdx != -1 && msg.type() == QDBusMessage::ReplyMessage) {
// Deliver the return values of a remote function call.
//
// There is only one connection and it is specified by idx
// The slot must have the same parameter types that the message does
// The slot may have less parameters than the message
// The slot may optionally have one final parameter that is QDBusMessage
// The slot receives read-only copies of the message (i.e., pass by value or by const-ref)
QDBusCallDeliveryEvent *e = prepareReply(connection, call->receiver, call->methodIdx,
call->metaTypes, msg);
if (e)
connection->postEventToThread(MessageResultReceivedAction, call->receiver, e);
else
qDBusDebug() << "Deliver failed!";
}
if (call->pending)
q_dbus_pending_call_unref(call->pending);
call->pending = 0;
locker.unlock();
// Are there any watchers?
if (call->watcherHelper)
call->watcherHelper->emitSignals(msg, call->sentMessage);
if (msg.type() == QDBusMessage::ErrorMessage)
emit connection->callWithCallbackFailed(QDBusError(msg), call->sentMessage);
if (call->autoDelete) {
Q_ASSERT(!call->waitingForFinished); // can't wait on a call with autoDelete!
delete call;
}
}
int QDBusConnectionPrivate::send(const QDBusMessage& message)
{
if (QDBusMessagePrivate::isLocal(message))
return -1; // don't send; the reply will be retrieved by the caller
// through the d_ptr->localReply link
QDBusError error;
DBusMessage *msg = QDBusMessagePrivate::toDBusMessage(message, capabilities, &error);
if (!msg) {
if (message.type() == QDBusMessage::MethodCallMessage)
qWarning("QDBusConnection: error: could not send message to service \"%s\" path \"%s\" interface \"%s\" member \"%s\": %s",
qPrintable(message.service()), qPrintable(message.path()),
qPrintable(message.interface()), qPrintable(message.member()),
qPrintable(error.message()));
else if (message.type() == QDBusMessage::SignalMessage)
qWarning("QDBusConnection: error: could not send signal path \"%s\" interface \"%s\" member \"%s\": %s",
qPrintable(message.path()), qPrintable(message.interface()),
qPrintable(message.member()),
qPrintable(error.message()));
else
qWarning("QDBusConnection: error: could not send %s message to service \"%s\": %s",
message.type() == QDBusMessage::ReplyMessage ? "reply" :
message.type() == QDBusMessage::ErrorMessage ? "error" :
"invalid", qPrintable(message.service()),
qPrintable(error.message()));
lastError = error;
return 0;
}
q_dbus_message_set_no_reply(msg, true); // the reply would not be delivered to anything
qDBusDebug() << this << "sending message (no reply):" << message;
checkThread();
bool isOk = q_dbus_connection_send(connection, msg, 0);
int serial = 0;
if (isOk)
serial = q_dbus_message_get_serial(msg);
q_dbus_message_unref(msg);
return serial;
}
QDBusMessage QDBusConnectionPrivate::sendWithReply(const QDBusMessage &message,
int sendMode, int timeout)
{
checkThread();
if ((sendMode == QDBus::BlockWithGui || sendMode == QDBus::Block)
&& isServiceRegisteredByThread(message.service()))
// special case for synchronous local calls
return sendWithReplyLocal(message);
if (!QCoreApplication::instance() || sendMode == QDBus::Block) {
QDBusError err;
DBusMessage *msg = QDBusMessagePrivate::toDBusMessage(message, capabilities, &err);
if (!msg) {
qWarning("QDBusConnection: error: could not send message to service \"%s\" path \"%s\" interface \"%s\" member \"%s\": %s",
qPrintable(message.service()), qPrintable(message.path()),
qPrintable(message.interface()), qPrintable(message.member()),
qPrintable(err.message()));
lastError = err;
return QDBusMessage::createError(err);
}
qDBusDebug() << this << "sending message (blocking):" << message;
QDBusErrorInternal error;
DBusMessage *reply = q_dbus_connection_send_with_reply_and_block(connection, msg, timeout, error);
q_dbus_message_unref(msg);
if (!!error) {
lastError = err = error;
return QDBusMessage::createError(err);
}
QDBusMessage amsg = QDBusMessagePrivate::fromDBusMessage(reply, capabilities);
q_dbus_message_unref(reply);
qDBusDebug() << this << "got message reply (blocking):" << amsg;
return amsg;
} else { // use the event loop
QDBusPendingCallPrivate *pcall = sendWithReplyAsync(message, timeout);
Q_ASSERT(pcall);
if (pcall->replyMessage.type() == QDBusMessage::InvalidMessage) {
pcall->watcherHelper = new QDBusPendingCallWatcherHelper;
QEventLoop loop;
loop.connect(pcall->watcherHelper, SIGNAL(reply(QDBusMessage)), SLOT(quit()));
loop.connect(pcall->watcherHelper, SIGNAL(error(QDBusError,QDBusMessage)), SLOT(quit()));
// enter the event loop and wait for a reply
loop.exec(QEventLoop::ExcludeUserInputEvents | QEventLoop::WaitForMoreEvents);
}
QDBusMessage reply = pcall->replyMessage;
lastError = reply; // set or clear error
delete pcall;
return reply;
}
}
QDBusMessage QDBusConnectionPrivate::sendWithReplyLocal(const QDBusMessage &message)
{
qDBusDebug() << this << "sending message via local-loop:" << message;
QDBusMessage localCallMsg = QDBusMessagePrivate::makeLocal(*this, message);
bool handled = handleMessage(localCallMsg);
if (!handled) {
QString interface = message.interface();
if (interface.isEmpty())
interface = QLatin1String("<no-interface>");
return QDBusMessage::createError(QDBusError::InternalError,
QString::fromLatin1("Internal error trying to call %1.%2 at %3 (signature '%4'")
.arg(interface, message.member(),
message.path(), message.signature()));
}
// if the message was handled, there might be a reply
QDBusMessage localReplyMsg = QDBusMessagePrivate::makeLocalReply(*this, localCallMsg);
if (localReplyMsg.type() == QDBusMessage::InvalidMessage) {
qWarning("QDBusConnection: cannot call local method '%s' at object %s (with signature '%s') "
"on blocking mode", qPrintable(message.member()), qPrintable(message.path()),
qPrintable(message.signature()));
return QDBusMessage::createError(
QDBusError(QDBusError::InternalError,
QLatin1String("local-loop message cannot have delayed replies")));
}
// there is a reply
qDBusDebug() << this << "got message via local-loop:" << localReplyMsg;
return localReplyMsg;
}
QDBusPendingCallPrivate *QDBusConnectionPrivate::sendWithReplyAsync(const QDBusMessage &message,
int timeout)
{
if (isServiceRegisteredByThread(message.service())) {
// special case for local calls
QDBusPendingCallPrivate *pcall = new QDBusPendingCallPrivate(message, this);
pcall->replyMessage = sendWithReplyLocal(message);
return pcall;
}
checkThread();
QDBusPendingCallPrivate *pcall = new QDBusPendingCallPrivate(message, this);
pcall->ref = 0;
QDBusError error;
DBusMessage *msg = QDBusMessagePrivate::toDBusMessage(message, capabilities, &error);
if (!msg) {
qWarning("QDBusConnection: error: could not send message to service \"%s\" path \"%s\" interface \"%s\" member \"%s\": %s",
qPrintable(message.service()), qPrintable(message.path()),
qPrintable(message.interface()), qPrintable(message.member()),
qPrintable(error.message()));
pcall->replyMessage = QDBusMessage::createError(error);
lastError = error;
return pcall;
}
qDBusDebug() << this << "sending message (async):" << message;
DBusPendingCall *pending = 0;
QDBusDispatchLocker locker(SendWithReplyAsyncAction, this);
if (q_dbus_connection_send_with_reply(connection, msg, &pending, timeout)) {
if (pending) {
q_dbus_message_unref(msg);
pcall->pending = pending;
q_dbus_pending_call_set_notify(pending, qDBusResultReceived, pcall, 0);
return pcall;
} else {
// we're probably disconnected at this point
lastError = error = QDBusError(QDBusError::Disconnected, QLatin1String("Not connected to server"));
}
} else {
lastError = error = QDBusError(QDBusError::NoMemory, QLatin1String("Out of memory"));
}
q_dbus_message_unref(msg);
pcall->replyMessage = QDBusMessage::createError(error);
return pcall;
}
int QDBusConnectionPrivate::sendWithReplyAsync(const QDBusMessage &message, QObject *receiver,
const char *returnMethod, const char *errorMethod,
int timeout)
{
QDBusPendingCallPrivate *pcall = sendWithReplyAsync(message, timeout);
Q_ASSERT(pcall);
// has it already finished with success (dispatched locally)?
if (pcall->replyMessage.type() == QDBusMessage::ReplyMessage) {
pcall->setReplyCallback(receiver, returnMethod);
processFinishedCall(pcall);
delete pcall;
return 1;
}
// either it hasn't finished or it has finished with error
if (errorMethod) {
pcall->watcherHelper = new QDBusPendingCallWatcherHelper;
connect(pcall->watcherHelper, SIGNAL(error(QDBusError,QDBusMessage)), receiver, errorMethod,
Qt::QueuedConnection);
pcall->watcherHelper->moveToThread(thread());
}
// has it already finished and is an error reply message?
if (pcall->replyMessage.type() == QDBusMessage::ErrorMessage) {
processFinishedCall(pcall);
delete pcall;
return 1;
}
pcall->autoDelete = true;
pcall->ref.ref();
pcall->setReplyCallback(receiver, returnMethod);
return 1;
}
bool QDBusConnectionPrivate::connectSignal(const QString &service,
const QString &path, const QString &interface, const QString &name,
const QStringList &argumentMatch, const QString &signature,
QObject *receiver, const char *slot)
{
// check the slot
QDBusConnectionPrivate::SignalHook hook;
QString key;
QString name2 = name;
if (name2.isNull())
name2.detach();
hook.signature = signature;
if (!prepareHook(hook, key, service, path, interface, name, argumentMatch, receiver, slot, 0, false))
return false; // don't connect
// avoid duplicating:
QDBusConnectionPrivate::SignalHookHash::ConstIterator it = signalHooks.find(key);
QDBusConnectionPrivate::SignalHookHash::ConstIterator end = signalHooks.constEnd();
for ( ; it != end && it.key() == key; ++it) {
const QDBusConnectionPrivate::SignalHook &entry = it.value();
if (entry.service == hook.service &&
entry.path == hook.path &&
entry.signature == hook.signature &&
entry.obj == hook.obj &&
entry.midx == hook.midx &&
entry.argumentMatch == hook.argumentMatch) {
// no need to compare the parameters if it's the same slot
return true; // already there
}
}
connectSignal(key, hook);
return true;
}
void QDBusConnectionPrivate::connectSignal(const QString &key, const SignalHook &hook)
{
signalHooks.insertMulti(key, hook);
connect(hook.obj, SIGNAL(destroyed(QObject*)), SLOT(objectDestroyed(QObject*)),
Qt::ConnectionType(Qt::DirectConnection | Qt::UniqueConnection));
MatchRefCountHash::iterator it = matchRefCounts.find(hook.matchRule);
if (it != matchRefCounts.end()) { // Match already present
it.value() = it.value() + 1;
return;
}
matchRefCounts.insert(hook.matchRule, 1);
if (connection) {
qDBusDebug("Adding rule: %s", hook.matchRule.constData());
q_dbus_bus_add_match(connection, hook.matchRule, NULL);
// Successfully connected the signal
// Do we need to watch for this name?
if (shouldWatchService(hook.service)) {
WatchedServicesHash::mapped_type &data = watchedServices[hook.service];
if (++data.refcount == 1) {
// we need to watch for this service changing
connectSignal(dbusServiceString(), QString(), dbusInterfaceString(),
QLatin1String("NameOwnerChanged"), QStringList() << hook.service, QString(),
this, SLOT(serviceOwnerChangedNoLock(QString,QString,QString)));
data.owner = getNameOwnerNoCache(hook.service);
qDBusDebug() << this << "Watching service" << hook.service << "for owner changes (current owner:"
<< data.owner << ")";
}
}
}
}
bool QDBusConnectionPrivate::disconnectSignal(const QString &service,
const QString &path, const QString &interface, const QString &name,
const QStringList &argumentMatch, const QString &signature,
QObject *receiver, const char *slot)
{
// check the slot
QDBusConnectionPrivate::SignalHook hook;
QString key;
QString name2 = name;
if (name2.isNull())
name2.detach();
hook.signature = signature;
if (!prepareHook(hook, key, service, path, interface, name, argumentMatch, receiver, slot, 0, false))
return false; // don't disconnect
// avoid duplicating:
QDBusConnectionPrivate::SignalHookHash::Iterator it = signalHooks.find(key);
QDBusConnectionPrivate::SignalHookHash::Iterator end = signalHooks.end();
for ( ; it != end && it.key() == key; ++it) {
const QDBusConnectionPrivate::SignalHook &entry = it.value();
if (entry.service == hook.service &&
entry.path == hook.path &&
entry.signature == hook.signature &&
entry.obj == hook.obj &&
entry.midx == hook.midx &&
entry.argumentMatch == hook.argumentMatch) {
// no need to compare the parameters if it's the same slot
disconnectSignal(it);
return true; // it was there
}
}
// the slot was not found
return false;
}
QDBusConnectionPrivate::SignalHookHash::Iterator
QDBusConnectionPrivate::disconnectSignal(SignalHookHash::Iterator &it)
{
const SignalHook &hook = it.value();
bool erase = false;
MatchRefCountHash::iterator i = matchRefCounts.find(hook.matchRule);
if (i == matchRefCounts.end()) {
qWarning("QDBusConnectionPrivate::disconnectSignal: MatchRule not found in matchRefCounts!!");
} else {
if (i.value() == 1) {
erase = true;
matchRefCounts.erase(i);
}
else {
i.value() = i.value() - 1;
}
}
// we don't care about errors here
if (connection && erase) {
qDBusDebug("Removing rule: %s", hook.matchRule.constData());
q_dbus_bus_remove_match(connection, hook.matchRule, NULL);
// Successfully disconnected the signal
// Were we watching for this name?
WatchedServicesHash::Iterator sit = watchedServices.find(hook.service);
if (sit != watchedServices.end()) {
if (--sit.value().refcount == 0) {
watchedServices.erase(sit);
disconnectSignal(dbusServiceString(), QString(), dbusInterfaceString(),
QLatin1String("NameOwnerChanged"), QStringList() << hook.service, QString(),
this, SLOT(_q_serviceOwnerChanged(QString,QString,QString)));
}
}
}
return signalHooks.erase(it);
}
void QDBusConnectionPrivate::registerObject(const ObjectTreeNode *node)
{
connect(node->obj, SIGNAL(destroyed(QObject*)), SLOT(objectDestroyed(QObject*)),
Qt::DirectConnection);
if (node->flags & (QDBusConnection::ExportAdaptors
| QDBusConnection::ExportScriptableSignals
| QDBusConnection::ExportNonScriptableSignals)) {
QDBusAdaptorConnector *connector = qDBusCreateAdaptorConnector(node->obj);
if (node->flags & (QDBusConnection::ExportScriptableSignals
| QDBusConnection::ExportNonScriptableSignals)) {
connector->disconnectAllSignals(node->obj);
connector->connectAllSignals(node->obj);
}
// disconnect and reconnect to avoid duplicates
connector->disconnect(SIGNAL(relaySignal(QObject*,const QMetaObject*,int,QVariantList)),
this, SLOT(relaySignal(QObject*,const QMetaObject*,int,QVariantList)));
connect(connector, SIGNAL(relaySignal(QObject*,const QMetaObject*,int,QVariantList)),
this, SLOT(relaySignal(QObject*,const QMetaObject*,int,QVariantList)),
Qt::DirectConnection);
}
}
void QDBusConnectionPrivate::connectRelay(const QString &service,
const QString &path, const QString &interface,
QDBusAbstractInterface *receiver,
const char *signal)
{
// this function is called by QDBusAbstractInterface when one of its signals is connected
// we set up a relay from D-Bus into it
SignalHook hook;
QString key;
if (!prepareHook(hook, key, service, path, interface, QString(), QStringList(), receiver, signal,
QDBusAbstractInterface::staticMetaObject.methodCount(), true))
return; // don't connect
// add it to our list:
QDBusWriteLocker locker(ConnectRelayAction, this);
SignalHookHash::ConstIterator it = signalHooks.find(key);
SignalHookHash::ConstIterator end = signalHooks.constEnd();
for ( ; it != end && it.key() == key; ++it) {
const SignalHook &entry = it.value();
if (entry.service == hook.service &&
entry.path == hook.path &&
entry.signature == hook.signature &&
entry.obj == hook.obj &&
entry.midx == hook.midx)
return; // already there, no need to re-add
}
connectSignal(key, hook);
}
void QDBusConnectionPrivate::disconnectRelay(const QString &service,
const QString &path, const QString &interface,
QDBusAbstractInterface *receiver,
const char *signal)
{
// this function is called by QDBusAbstractInterface when one of its signals is disconnected
// we remove relay from D-Bus into it
SignalHook hook;
QString key;
if (!prepareHook(hook, key, service, path, interface, QString(), QStringList(), receiver, signal,
QDBusAbstractInterface::staticMetaObject.methodCount(), true))
return; // don't connect
// remove it from our list:
QDBusWriteLocker locker(DisconnectRelayAction, this);
SignalHookHash::Iterator it = signalHooks.find(key);
SignalHookHash::Iterator end = signalHooks.end();
for ( ; it != end && it.key() == key; ++it) {
const SignalHook &entry = it.value();
if (entry.service == hook.service &&
entry.path == hook.path &&
entry.signature == hook.signature &&
entry.obj == hook.obj &&
entry.midx == hook.midx) {
// found it
disconnectSignal(it);
return;
}
}
qWarning("QDBusConnectionPrivate::disconnectRelay called for a signal that was not found");
}
QString QDBusConnectionPrivate::getNameOwner(const QString& serviceName)
{
if (QDBusUtil::isValidUniqueConnectionName(serviceName))
return serviceName;
if (!connection)
return QString();
{
// acquire a read lock for the cache
QReadLocker locker(&lock);
WatchedServicesHash::ConstIterator it = watchedServices.constFind(serviceName);
if (it != watchedServices.constEnd())
return it->owner;
}
// not cached
return getNameOwnerNoCache(serviceName);
}
QString QDBusConnectionPrivate::getNameOwnerNoCache(const QString &serviceName)
{
QDBusMessage msg = QDBusMessage::createMethodCall(dbusServiceString(),
QLatin1String(DBUS_PATH_DBUS), dbusInterfaceString(),
QLatin1String("GetNameOwner"));
QDBusMessagePrivate::setParametersValidated(msg, true);
msg << serviceName;
QDBusMessage reply = sendWithReply(msg, QDBus::Block);
if (reply.type() == QDBusMessage::ReplyMessage)
return reply.arguments().at(0).toString();
return QString();
}
QDBusMetaObject *
QDBusConnectionPrivate::findMetaObject(const QString &service, const QString &path,
const QString &interface, QDBusError &error)
{
// service must be a unique connection name
if (!interface.isEmpty()) {
QDBusReadLocker locker(FindMetaObject1Action, this);
QDBusMetaObject *mo = cachedMetaObjects.value(interface, 0);
if (mo)
return mo;
}
// introspect the target object
QDBusMessage msg = QDBusMessage::createMethodCall(service, path,
QLatin1String(DBUS_INTERFACE_INTROSPECTABLE),
QLatin1String("Introspect"));
QDBusMessagePrivate::setParametersValidated(msg, true);
QDBusMessage reply = sendWithReply(msg, QDBus::Block);
// it doesn't exist yet, we have to create it
QDBusWriteLocker locker(FindMetaObject2Action, this);
QDBusMetaObject *mo = 0;
if (!interface.isEmpty())
mo = cachedMetaObjects.value(interface, 0);
if (mo)
// maybe it got created when we switched from read to write lock
return mo;
QString xml;
if (reply.type() == QDBusMessage::ReplyMessage) {
if (reply.signature() == QLatin1String("s"))
// fetch the XML description
xml = reply.arguments().at(0).toString();
} else {
error = reply;
lastError = error;
if (reply.type() != QDBusMessage::ErrorMessage || error.type() != QDBusError::UnknownMethod)
return 0; // error
}
// release the lock and return
QDBusMetaObject *result = QDBusMetaObject::createMetaObject(interface, xml,
cachedMetaObjects, error);
lastError = error;
return result;
}
void QDBusConnectionPrivate::registerService(const QString &serviceName)
{
QDBusWriteLocker locker(RegisterServiceAction, this);
registerServiceNoLock(serviceName);
}
void QDBusConnectionPrivate::registerServiceNoLock(const QString &serviceName)
{
serviceNames.append(serviceName);
}
void QDBusConnectionPrivate::unregisterService(const QString &serviceName)
{
QDBusWriteLocker locker(UnregisterServiceAction, this);
unregisterServiceNoLock(serviceName);
}
void QDBusConnectionPrivate::unregisterServiceNoLock(const QString &serviceName)
{
serviceNames.removeAll(serviceName);
}
bool QDBusConnectionPrivate::isServiceRegisteredByThread(const QString &serviceName) const
{
if (serviceName == baseService)
return true;
QStringList copy = serviceNames;
return copy.contains(serviceName);
}
void QDBusConnectionPrivate::postEventToThread(int action, QObject *object, QEvent *ev)
{
QDBusLockerBase::reportThreadAction(action, QDBusLockerBase::BeforePost, this);
QCoreApplication::postEvent(object, ev);
QDBusLockerBase::reportThreadAction(action, QDBusLockerBase::AfterPost, this);
}
QT_END_NAMESPACE
#endif // QT_NO_DBUS
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