Add dispatcher thread implementation.

This should fix the endless dispatcher loop which throttled CPU usage to 100%.

Signed-off-by: Mavridis Philippe <mavridisf@gmail.com>

src/CMakeLists.txt

@@ -37,9 +37,9 @@ install( FILES
 tde_add_library( dbus-1-tqt SHARED AUTOMOC
   SOURCES ${dbus_tqt_MOCS}
     tqdbusconnection.cpp tqdbuserror.cpp tqdbusintegrator.cpp
-    tqdbusmarshall.cpp tqdbusmessage.cpp tqdbusserver.cpp
-    tqdbusproxy.cpp tqdbusdata.cpp tqdbusdatalist.cpp
-    tqdbusobjectpath.cpp tqdbusunixfd.cpp
+    tqdbusdispatcher.cpp tqdbusmarshall.cpp tqdbusmessage.cpp
+    tqdbusserver.cpp tqdbusproxy.cpp tqdbusdata.cpp
+    tqdbusdatalist.cpp tqdbusobjectpath.cpp tqdbusunixfd.cpp
     tqdbusdataconverter.cpp
   VERSION 0.0.0
   LINK ${TQT_LIBRARIES} ${DBUS_LIBRARIES}

src/tqdbusconnection_p.h

@@ -50,6 +50,7 @@
 #include "tqdbusmessage.h"
 
 class TQT_DBusMessage;
+class TQT_DBusDispatcher;
 class TQSocketNotifier;
 class TQTimer;
 class TQTimerEvent;
@@ -117,7 +118,7 @@ public:
     DBusConnection *connection;
     DBusServer *server;
 
-    TQTimer* dispatcher;
+    TQT_DBusDispatcher* dispatcher;
 
     static int messageMetaType;
     static int registerMessageMetaType();

src/tqdbusdispatcher.cpp

@@ -0,0 +1,64 @@
+/* qdbusdispatcher.cpp TQT_DBusDispatcher private implementation
+ *
+ * Copyright (C) 2024 Mavridis Philippe <mavridisf@gmail.com>
+ *
+ * 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 <tqmutex.h>
+
+#include "tqdbusconnection_p.h"
+#include "tqdbusdispatcher_p.h"
+#include "tqdbusdispatcher_p.moc"
+
+TQT_DBusDispatcher::TQT_DBusDispatcher(TQT_DBusConnectionPrivate *connection)
+: TQObject(), m_connection(connection), m_busy(new TQMutex()), m_dispatch(false)
+{
+}
+
+TQT_DBusDispatcher::~TQT_DBusDispatcher()
+{
+}
+
+void TQT_DBusDispatcher::run()
+{
+    m_dispatch = true;
+    while (m_dispatch)
+    {
+        usleep(50);
+        dispatch();
+    }
+}
+
+void TQT_DBusDispatcher::dispatch()
+{
+    TQMutexLocker locker(m_busy);
+
+    if (m_connection->mode == TQT_DBusConnectionPrivate::ClientMode)
+    {
+        if (dbus_connection_dispatch(m_connection->connection) != DBUS_DISPATCH_DATA_REMAINS)
+        {
+            if (running())
+            {
+                m_dispatch = false;
+                exit();
+            }
+        }
+    }
+}

src/tqdbusdispatcher_p.h

@@ -0,0 +1,63 @@
+/* qdbusdispatcher_p.h TQT_DBusDispatcher private object
+ *
+ * Copyright (C) 2024 Mavridis Philippe <mavridisf@gmail.com>
+ *
+ * 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.
+ *
+ */
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the public API.  This header file may
+// change from version to version without notice, or even be
+// removed.
+//
+// We mean it.
+//
+//
+
+
+#ifndef TQDBUSDISPATCHER_P_H
+#define TQDBUSDISPATCHER_P_H
+
+#include <tqthread.h>
+
+class TQT_DBusConnectionPrivate;
+class TQMutex;
+
+class TQT_DBusDispatcher : public TQObject, public TQThread
+{
+    TQ_OBJECT
+
+    public:
+        TQT_DBusDispatcher(TQT_DBusConnectionPrivate *connection);
+        ~TQT_DBusDispatcher();
+        void run();
+
+    public slots:
+        void dispatch();
+
+    private:
+        TQT_DBusConnectionPrivate *m_connection;
+        TQMutex *m_busy;
+        bool m_dispatch;
+};
+
+#endif

src/tqdbusintegrator.cpp

@@ -29,6 +29,7 @@
 #include <tqtimer.h>
 
 #include "tqdbusconnection_p.h"
+#include "tqdbusdispatcher_p.h"
 #include "tqdbusmessage.h"
 
 Atomic::Atomic(int value) : m_value(value)
@@ -273,16 +274,14 @@ int TQT_DBusConnectionPrivate::registerMessageMetaType()
 
 TQT_DBusConnectionPrivate::TQT_DBusConnectionPrivate(TQObject *parent)
     : TQObject(parent), ref(1), mode(InvalidMode), connection(0), server(0),
-      dispatcher(0), inDispatch(false)
+      dispatcher(new TQT_DBusDispatcher(this))
 {
     static const int msgType = registerMessageMetaType();
     Q_UNUSED(msgType);
 
+    dbus_threads_init_default();
     dbus_error_init(&error);
 
-    dispatcher = new TQTimer(this);
-    TQObject::connect(dispatcher, TQ_SIGNAL(timeout()), this, TQ_SLOT(dispatch()));
-
     m_resultEmissionQueueTimer = new TQTimer(this);
     TQObject::connect(m_resultEmissionQueueTimer, TQ_SIGNAL(timeout()), this, TQ_SLOT(transmitResultEmissionQueue()));
     m_messageEmissionQueueTimer = new TQTimer(this);
@@ -485,28 +484,12 @@ void TQT_DBusConnectionPrivate::purgeRemovedWatches()
 
 void TQT_DBusConnectionPrivate::scheduleDispatch()
 {
-    dispatcher->start(0);
+    dispatcher->start();
 }
 
 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;
+    TQTimer::singleShot(0, dispatcher, TQ_SLOT(dispatch()));
 }
 
 void TQT_DBusConnectionPrivate::transmitMessageEmissionQueue()