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dbus-1-tqt/tqdbusintegrator.cpp

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/* qdbusintegrator.cpp TQT_DBusConnection private implementation
*
* Copyright (C) 2005 Harald Fernengel <harry@tdevelop.org>
* Copyright (C) 2005 Kevin Krammer <kevin.krammer@gmx.at>
*
* Licensed under the Academic Free License version 2.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
*/
#include <tqapplication.h>
#include <tqevent.h>
#include <tqmetaobject.h>
#include <tqsocketnotifier.h>
#include <tqtimer.h>
#include "tqdbusconnection_p.h"
#include "tqdbusmessage.h"
Atomic::Atomic(int value) : m_value(value)
{
}
void Atomic::ref()
{
m_value++;
}
bool Atomic::deref()
{
m_value--;
return m_value > 0;
}
int TQT_DBusConnectionPrivate::messageMetaType = 0;
static dbus_bool_t qDBusAddTimeout(DBusTimeout *timeout, void *data)
{
Q_ASSERT(timeout);
Q_ASSERT(data);
// tqDebug("addTimeout %d", dbus_timeout_get_interval(timeout));
TQT_DBusConnectionPrivate *d = static_cast<TQT_DBusConnectionPrivate *>(data);
if (!dbus_timeout_get_enabled(timeout))
return true;
if (!tqApp) {
d->pendingTimeouts.append(timeout);
return true;
}
int timerId = d->startTimer(dbus_timeout_get_interval(timeout));
if (!timerId)
return false;
d->timeouts[timerId] = timeout;
return true;
}
static void qDBusRemoveTimeout(DBusTimeout *timeout, void *data)
{
Q_ASSERT(timeout);
Q_ASSERT(data);
// tqDebug("removeTimeout");
TQT_DBusConnectionPrivate *d = static_cast<TQT_DBusConnectionPrivate *>(data);
for (TQValueList<DBusTimeout*>::iterator it = d->pendingTimeouts.begin();
it != d->pendingTimeouts.end();) {
if ((*it) == timeout) {
it = d->pendingTimeouts.erase(it);
}
else
++it;
}
TQT_DBusConnectionPrivate::TimeoutHash::iterator it = d->timeouts.begin();
while (it != d->timeouts.end()) {
if (it.data() == timeout) {
d->killTimer(it.key());
TQT_DBusConnectionPrivate::TimeoutHash::iterator copyIt = it;
++it;
d->timeouts.erase(copyIt);
} else {
++it;
}
}
}
static void qDBusToggleTimeout(DBusTimeout *timeout, void *data)
{
Q_ASSERT(timeout);
Q_ASSERT(data);
//tqDebug("ToggleTimeout");
qDBusRemoveTimeout(timeout, data);
qDBusAddTimeout(timeout, data);
}
static dbus_bool_t qDBusAddWatch(DBusWatch *watch, void *data)
{
Q_ASSERT(watch);
Q_ASSERT(data);
TQT_DBusConnectionPrivate *d = static_cast<TQT_DBusConnectionPrivate *>(data);
int flags = dbus_watch_get_flags(watch);
int fd = dbus_watch_get_unix_fd(watch);
TQT_DBusConnectionPrivate::Watcher watcher;
if (flags & DBUS_WATCH_READABLE) {
bool enabled = dbus_watch_get_enabled(watch);
//tqDebug("addReadWatch %d %s", fd, (enabled ? "enabled" : "disabled"));
watcher.watch = watch;
if (tqApp) {
watcher.read = new TQSocketNotifier(fd, TQSocketNotifier::Read, d);
if (!enabled) watcher.read->setEnabled(false);
d->connect(watcher.read, TQT_SIGNAL(activated(int)), TQT_SLOT(socketRead(int)));
}
}
if (flags & DBUS_WATCH_WRITABLE) {
bool enabled = dbus_watch_get_enabled(watch);
//tqDebug("addWriteWatch %d %s", fd, (enabled ? "enabled" : "disabled"));
watcher.watch = watch;
if (tqApp) {
watcher.write = new TQSocketNotifier(fd, TQSocketNotifier::Write, d);
if (!enabled) watcher.write->setEnabled(false);
d->connect(watcher.write, TQT_SIGNAL(activated(int)), TQT_SLOT(socketWrite(int)));
}
}
// FIXME-QT4 d->watchers.insertMulti(fd, watcher);
TQT_DBusConnectionPrivate::WatcherHash::iterator it = d->watchers.find(fd);
if (it == d->watchers.end())
{
it = d->watchers.insert(fd, TQT_DBusConnectionPrivate::WatcherList());
}
it.data().append(watcher);
return true;
}
static void qDBusRemoveWatch(DBusWatch *watch, void *data)
{
Q_ASSERT(watch);
Q_ASSERT(data);
//tqDebug("remove watch");
TQT_DBusConnectionPrivate *d = static_cast<TQT_DBusConnectionPrivate *>(data);
int fd = dbus_watch_get_unix_fd(watch);
TQT_DBusConnectionPrivate::WatcherHash::iterator it = d->watchers.find(fd);
if (it != d->watchers.end())
{
TQT_DBusConnectionPrivate::WatcherList& list = *it;
for (TQT_DBusConnectionPrivate::WatcherList::iterator wit = list.begin();
wit != list.end(); ++wit)
{
if ((*wit).watch == watch)
{
// migth be called from a function triggered by a socket listener
// so just disconnect them and schedule their delayed deletion.
d->removedWatches.append(*wit);
if ((*wit).read)
{
(*wit).read->disconnect(d);
(*wit).read = 0;
}
if ((*wit).write)
{
(*wit).write->disconnect(d);
(*wit).write = 0;
}
(*wit).watch = 0;
}
}
}
if (d->removedWatches.count() > 0)
TQTimer::singleShot(0, d, TQT_SLOT(purgeRemovedWatches()));
}
static void qDBusToggleWatch(DBusWatch *watch, void *data)
{
Q_ASSERT(watch);
Q_ASSERT(data);
//tqDebug("toggle watch");
TQT_DBusConnectionPrivate *d = static_cast<TQT_DBusConnectionPrivate *>(data);
int fd = dbus_watch_get_unix_fd(watch);
TQT_DBusConnectionPrivate::WatcherHash::iterator it = d->watchers.find(fd);
if (it != d->watchers.end()) {
TQT_DBusConnectionPrivate::WatcherList& list = *it;
for (TQT_DBusConnectionPrivate::WatcherList::iterator wit = list.begin(); wit != list.end();
++wit)
{
if ((*wit).watch == watch) {
bool enabled = dbus_watch_get_enabled(watch);
int flags = dbus_watch_get_flags(watch);
// tqDebug("toggle watch %d to %d (write: %d, read: %d)",
// dbus_watch_get_unix_fd(watch), enabled,
// flags & DBUS_WATCH_WRITABLE, flags & DBUS_WATCH_READABLE);
if (flags & DBUS_WATCH_READABLE && (*wit).read)
(*wit).read->setEnabled(enabled);
if (flags & DBUS_WATCH_WRITABLE && (*wit).write)
(*wit).write->setEnabled(enabled);
return;
}
}
}
}
static void qDBusNewConnection(DBusServer *server, DBusConnection *c, void *data)
{
Q_ASSERT(data); Q_ASSERT(server); Q_ASSERT(c);
tqDebug("SERVER: GOT A NEW CONNECTION"); // TODO
}
static DBusHandlerResult qDBusSignalFilter(DBusConnection *connection,
DBusMessage *message, void *data)
{
Q_ASSERT(data);
Q_UNUSED(connection);
TQT_DBusConnectionPrivate *d = static_cast<TQT_DBusConnectionPrivate *>(data);
if (d->mode == TQT_DBusConnectionPrivate::InvalidMode)
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
int msgType = dbus_message_get_type(message);
bool handled = false;
//TQT_DBusMessage amsg = TQT_DBusMessage::fromDBusMessage(message);
//tqDebug() << "got message: " << dbus_message_get_type(message) << amsg;
if (msgType == DBUS_MESSAGE_TYPE_SIGNAL) {
handled = d->handleSignal(message);
} else if (msgType == DBUS_MESSAGE_TYPE_METHOD_CALL) {
handled = d->handleObjectCall(message);
}
return handled ? DBUS_HANDLER_RESULT_HANDLED :
DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
int TQT_DBusConnectionPrivate::registerMessageMetaType()
{
// FIXME-QT4 int tp = messageMetaType = qRegisterMetaType<TQT_DBusMessage>("TQT_DBusMessage");
int tp = 0;
return tp;
}
TQT_DBusConnectionPrivate::TQT_DBusConnectionPrivate(TQObject *parent)
: TQObject(parent), ref(1), mode(InvalidMode), connection(0), server(0),
dispatcher(0), inDispatch(false)
{
static const int msgType = registerMessageMetaType();
Q_UNUSED(msgType);
dbus_error_init(&error);
dispatcher = new TQTimer(this);
TQObject::connect(dispatcher, TQT_SIGNAL(timeout()), this, TQT_SLOT(dispatch()));
m_resultEmissionQueueTimer = new TQTimer(this);
TQObject::connect(m_resultEmissionQueueTimer, TQT_SIGNAL(timeout()), this, TQT_SLOT(transmitResultEmissionQueue()));
m_messageEmissionQueueTimer = new TQTimer(this);
TQObject::connect(m_messageEmissionQueueTimer, TQT_SIGNAL(timeout()), this, TQT_SLOT(transmitMessageEmissionQueue()));
}
TQT_DBusConnectionPrivate::~TQT_DBusConnectionPrivate()
{
if (dbus_error_is_set(&error))
dbus_error_free(&error);
closeConnection();
}
void TQT_DBusConnectionPrivate::closeConnection()
{
ConnectionMode oldMode = mode;
mode = InvalidMode; // prevent reentrancy
if (oldMode == ServerMode) {
if (server) {
dbus_server_disconnect(server);
dbus_server_unref(server);
server = 0;
}
} else if (oldMode == ClientMode) {
if (connection) {
// closing shared connections is forbidden
#if 0
dbus_connection_close(connection);
// send the "close" message
while (dbus_connection_dispatch(connection) == DBUS_DISPATCH_DATA_REMAINS);
#endif
dbus_connection_unref(connection);
connection = 0;
}
}
}
bool TQT_DBusConnectionPrivate::handleError()
{
lastError = TQT_DBusError(&error);
if (dbus_error_is_set(&error))
dbus_error_free(&error);
return lastError.isValid();
}
void TQT_DBusConnectionPrivate::emitPendingCallReply(const TQT_DBusMessage& message)
{
emit dbusPendingCallReply(message);
}
void TQT_DBusConnectionPrivate::bindToApplication()
{
// Yay, now that we have an application we are in business
// Re-add all watchers
WatcherHash oldWatchers = watchers;
watchers.clear();
// FIXME-QT4 TQHashIterator<int, TQT_DBusConnectionPrivate::Watcher> it(oldWatchers);
for (WatcherHash::const_iterator it = oldWatchers.begin(); it != oldWatchers.end(); ++it)
{
const WatcherList& list = *it;
for (WatcherList::const_iterator wit = list.begin(); wit != list.end(); ++wit)
{
if (!(*wit).read && !(*wit).write) {
qDBusAddWatch((*wit).watch, this);
}
}
}
// Re-add all timeouts
while (!pendingTimeouts.isEmpty()) {
qDBusAddTimeout(pendingTimeouts.first(), this);
pendingTimeouts.pop_front();
}
}
void TQT_DBusConnectionPrivate::socketRead(int fd)
{
// FIXME-QT4 TQHashIterator<int, TQT_DBusConnectionPrivate::Watcher> it(watchers);
WatcherHash::const_iterator it = watchers.find(fd);
if (it != watchers.end()) {
const WatcherList& list = *it;
for (WatcherList::const_iterator wit = list.begin(); wit != list.end(); ++wit) {
if ((*wit).read && (*wit).read->isEnabled()) {
if (!dbus_watch_handle((*wit).watch, DBUS_WATCH_READABLE))
tqDebug("OUT OF MEM");
}
}
}
if (mode == ClientMode)
scheduleDispatch();
}
void TQT_DBusConnectionPrivate::socketWrite(int fd)
{
// FIXME-QT4 TQHashIterator<int, TQT_DBusConnectionPrivate::Watcher> it(watchers);
WatcherHash::const_iterator it = watchers.find(fd);
if (it != watchers.end()) {
const WatcherList& list = *it;
for (WatcherList::const_iterator wit = list.begin(); wit != list.end(); ++wit) {
if ((*wit).write && (*wit).write->isEnabled()) {
if (!dbus_watch_handle((*wit).watch, DBUS_WATCH_WRITABLE))
tqDebug("OUT OF MEM");
}
}
}
}
void TQT_DBusConnectionPrivate::objectDestroyed(TQObject* object)
{
//tqDebug("Object destroyed");
for (PendingCallMap::iterator it = pendingCalls.begin(); it != pendingCalls.end();)
{
TQObject* receiver = (TQObject*) it.data()->receiver;
if (receiver == object || receiver == 0)
{
PendingCallMap::iterator copyIt = it;
++it;
dbus_pending_call_cancel(copyIt.key());
dbus_pending_call_unref(copyIt.key());
delete copyIt.data();
pendingCalls.erase(copyIt);
}
else
++it;
}
}
void TQT_DBusConnectionPrivate::purgeRemovedWatches()
{
if (removedWatches.isEmpty()) return;
WatcherList::iterator listIt = removedWatches.begin();
for (; listIt != removedWatches.end(); ++listIt)
{
delete (*listIt).read;
delete (*listIt).write;
}
removedWatches.clear();
uint count = 0;
WatcherHash::iterator it = watchers.begin();
while (it != watchers.end())
{
WatcherList& list = *it;
listIt = list.begin();
while (listIt != list.end())
{
if (!((*listIt).read) && !((*listIt).write))
{
listIt = list.erase(listIt);
++count;
}
}
if (list.isEmpty())
{
WatcherHash::iterator copyIt = it;
++it;
watchers.erase(copyIt);
}
else
++it;
}
}
void TQT_DBusConnectionPrivate::scheduleDispatch()
{
dispatcher->start(0);
}
void TQT_DBusConnectionPrivate::dispatch()
{
// dbus_connection_dispatch will hang if called recursively
if (inDispatch) {
printf("[dbus-1-tqt] WARNING: Attempt to call dispatch() recursively was silently ignored to prevent lockup!\n\r"); fflush(stdout);
return;
}
inDispatch = true;
if (mode == ClientMode)
{
if (dbus_connection_dispatch(connection) != DBUS_DISPATCH_DATA_REMAINS)
{
// stop dispatch timer
dispatcher->stop();
}
}
inDispatch = false;
}
void TQT_DBusConnectionPrivate::transmitMessageEmissionQueue()
{
TQT_DBusConnectionPrivate::PendingMessagesForEmit::iterator pmfe;
pmfe = pendingMessages.begin();
while (pmfe != pendingMessages.end()) {
TQT_DBusMessage msg = *pmfe;
pmfe = pendingMessages.remove(pmfe);
dbusSignal(msg);
}
}
bool TQT_DBusConnectionPrivate::handleObjectCall(DBusMessage *message)
{
TQT_DBusMessage msg = TQT_DBusMessage::fromDBusMessage(message);
ObjectMap::iterator it = registeredObjects.find(msg.path());
if (it == registeredObjects.end())
return false;
return it.data()->handleMethodCall(msg);
}
bool TQT_DBusConnectionPrivate::handleSignal(DBusMessage *message)
{
TQT_DBusMessage msg = TQT_DBusMessage::fromDBusMessage(message);
// yes, it is a single "|" below...
// FIXME-QT4
//return handleSignal(TQString(), msg) | handleSignal(msg.path(), msg);
// If dbusSignal(msg) were called here, it could easily cause a lockup as it would enter the TQt3 event loop,
// which could result in arbitrary methods being called while still inside dbus_connection_dispatch.
// Instead, I enqueue the messages here for TQt3 event loop transmission after dbus_connection_dispatch is finished.
pendingMessages.append(msg);
if (!m_messageEmissionQueueTimer->isActive()) m_messageEmissionQueueTimer->start(0, TRUE);
return true;
}
static dbus_int32_t server_slot = -1;
void TQT_DBusConnectionPrivate::setServer(DBusServer *s)
{
if (!server) {
handleError();
return;
}
server = s;
mode = ServerMode;
dbus_server_allocate_data_slot(&server_slot);
if (server_slot < 0)
return;
dbus_server_set_watch_functions(server, qDBusAddWatch, qDBusRemoveWatch,
qDBusToggleWatch, this, 0); // ### check return type?
dbus_server_set_timeout_functions(server, qDBusAddTimeout, qDBusRemoveTimeout,
qDBusToggleTimeout, this, 0);
dbus_server_set_new_connection_function(server, qDBusNewConnection, this, 0);
dbus_server_set_data(server, server_slot, this, 0);
}
void TQT_DBusConnectionPrivate::setConnection(DBusConnection *dbc)
{
if (!dbc) {
handleError();
return;
}
connection = dbc;
mode = ClientMode;
dbus_connection_set_exit_on_disconnect(connection, false);
dbus_connection_set_watch_functions(connection, qDBusAddWatch, qDBusRemoveWatch,
qDBusToggleWatch, this, 0);
dbus_connection_set_timeout_functions(connection, qDBusAddTimeout, qDBusRemoveTimeout,
qDBusToggleTimeout, this, 0);
// dbus_bus_add_match(connection, "type='signal',interface='com.trolltech.dbus.Signal'", &error);
// dbus_bus_add_match(connection, "type='signal'", &error);
dbus_bus_add_match(connection, "type='signal'", &error);
if (handleError()) {
closeConnection();
return;
}
const char *service = dbus_bus_get_unique_name(connection);
if (service) {
TQCString filter;
filter += "destination='";
filter += service;
filter += "\'";
dbus_bus_add_match(connection, filter.data(), &error);
if (handleError()) {
closeConnection();
return;
}
} else {
tqWarning("TQT_DBusConnectionPrivate::SetConnection: Unable to get unique name");
}
dbus_connection_add_filter(connection, qDBusSignalFilter, this, 0);
//tqDebug("unique name: %s", service);
}
static void qDBusResultReceived(DBusPendingCall *pending, void *user_data)
{
//tqDebug("Pending Call Result received");
TQT_DBusConnectionPrivate* d = reinterpret_cast<TQT_DBusConnectionPrivate*>(user_data);
TQT_DBusConnectionPrivate::PendingCallMap::iterator it = d->pendingCalls.find(pending);
DBusMessage *dbusReply = dbus_pending_call_steal_reply(pending);
dbus_set_error_from_message(&d->error, dbusReply);
d->handleError();
if (it != d->pendingCalls.end())
{
TQT_DBusMessage reply = TQT_DBusMessage::fromDBusMessage(dbusReply);
TQT_DBusResultInfo dbusResult;
dbusResult.message = reply;
dbusResult.receiver = it.data()->receiver;
dbusResult.method = it.data()->method.data();
d->m_resultEmissionQueue.append(dbusResult);
d->newMethodInResultEmissionQueue();
}
dbus_message_unref(dbusReply);
dbus_pending_call_unref(pending);
delete it.data();
d->pendingCalls.erase(it);
}
int TQT_DBusConnectionPrivate::sendWithReplyAsync(const TQT_DBusMessage &message, TQObject *receiver,
const char *method)
{
if (!receiver || !method)
return 0;
if (!TQObject::connect(receiver, TQT_SIGNAL(destroyed(TQObject*)),
this, TQT_SLOT(objectDestroyed(TQObject*))))
return false;
DBusMessage *msg = message.toDBusMessage();
if (!msg)
return 0;
DBusPendingCall *pending = 0;
if (dbus_connection_send_with_reply(connection, msg, &pending, message.timeout())) {
TQT_DBusPendingCall *pcall = new TQT_DBusPendingCall;
pcall->receiver = receiver;
pcall->method = method;
pcall->pending = dbus_pending_call_ref(pending);
pendingCalls.insert(pcall->pending, pcall);
dbus_pending_call_set_notify(pending, qDBusResultReceived, this, 0);
return dbus_message_get_serial(msg);
}
return 0;
}
void TQT_DBusConnectionPrivate::flush()
{
if (!connection) return;
dbus_connection_flush(connection);
}
void TQT_DBusConnectionPrivate::newMethodInResultEmissionQueue()
{
if (!m_resultEmissionQueueTimer->isActive()) m_resultEmissionQueueTimer->start(0, TRUE);
}
void TQT_DBusConnectionPrivate::transmitResultEmissionQueue()
{
if (!m_resultEmissionQueue.isEmpty()) {
TQT_DBusResultInfoList::Iterator it;
it = m_resultEmissionQueue.begin();
while (it != m_resultEmissionQueue.end()) {
TQT_DBusResultInfo dbusResult = (*it);
m_resultEmissionQueue.remove(it);
it = m_resultEmissionQueue.begin();
TQObject::connect(this, TQT_SIGNAL(dbusPendingCallReply(const TQT_DBusMessage&)), dbusResult.receiver, dbusResult.method.data());
emitPendingCallReply(dbusResult.message);
TQObject::disconnect(this, TQT_SIGNAL(dbusPendingCallReply(const TQT_DBusMessage&)), dbusResult.receiver, dbusResult.method.data());
}
}
}
#include "tqdbusconnection_p.moc"
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