#1346: Update threading model in Star Tracker, PER Tester and APRS features

plugins/feature/aprs/aprs.cpp

@@ -44,12 +44,12 @@ const char* const APRS::m_featureIdURI = "sdrangel.feature.aprs";
 const char* const APRS::m_featureId = "APRS";
 
 APRS::APRS(WebAPIAdapterInterface *webAPIAdapterInterface) :
-    Feature(m_featureIdURI, webAPIAdapterInterface)
+    Feature(m_featureIdURI, webAPIAdapterInterface),
+    m_thread(nullptr),
+    m_worker(nullptr)
 {
     qDebug("APRS::APRS: webAPIAdapterInterface: %p", webAPIAdapterInterface);
     setObjectName(m_featureId);
-    m_worker = new APRSWorker(this, webAPIAdapterInterface);
-    m_worker->moveToThread(&m_thread);
     m_state = StIdle;
     m_errorMessage = "APRS error";
     m_networkManager = new QNetworkAccessManager();
@@ -83,22 +83,24 @@ APRS::~APRS()
         &APRS::networkManagerFinished
     );
     delete m_networkManager;
-    if (m_worker->isRunning()) {
+    stop();
-        stop();
-    }
-
-    delete m_worker;
 }
 
 void APRS::start()
 {
     qDebug("APRS::start");
-    m_worker->reset();
+    m_thread = new QThread(this);
+    m_worker = new APRSWorker(this, m_webAPIAdapterInterface);
+    m_worker->moveToThread(m_thread);
+
+    QObject::connect(m_thread, &QThread::started, m_worker, &APRSWorker::startWork);
+    QObject::connect(m_thread, &QThread::finished, m_worker, &QObject::deleteLater);
+    QObject::connect(m_thread, &QThread::finished, m_thread, &QThread::deleteLater);
+
     m_worker->setMessageQueueToFeature(getInputMessageQueue());
     m_worker->setMessageQueueToGUI(getMessageQueueToGUI());
-    bool ok = m_worker->startWork();
+    m_thread->start();
-    m_state = ok ? StIdle : StError;
+    m_state = StRunning;
-    m_thread.start();
 
     APRSWorker::MsgConfigureAPRSWorker *msg = APRSWorker::MsgConfigureAPRSWorker::create(m_settings, true);
     m_worker->getInputMessageQueue()->push(msg);
@@ -107,10 +109,14 @@ void APRS::start()
 void APRS::stop()
 {
     qDebug("APRS::stop");
-    m_worker->stopWork();
     m_state = StIdle;
-    m_thread.quit();
+    if (m_thread)
-    m_thread.wait();
+    {
+        m_thread->quit();
+        m_thread->wait();
+        m_thread = nullptr;
+        m_worker = nullptr;
+    }
 }
 
 bool APRS::handleMessage(const Message& cmd)
@@ -150,7 +156,7 @@ bool APRS::handleMessage(const Message& cmd)
             MainCore::MsgPacket *copy = new MainCore::MsgPacket(report);
             getMessageQueueToGUI()->push(copy);
         }
-        if (m_state == StRunning)
+        if (m_worker)
         {
             MainCore::MsgPacket *copy = new MainCore::MsgPacket(report);
             m_worker->getInputMessageQueue()->push(copy);
@@ -219,7 +225,9 @@ void APRS::applySettings(const APRSSettings& settings, bool force)
     APRSWorker::MsgConfigureAPRSWorker *msg = APRSWorker::MsgConfigureAPRSWorker::create(
         settings, force
     );
-    m_worker->getInputMessageQueue()->push(msg);
+    if (m_worker) {
+        m_worker->getInputMessageQueue()->push(msg);
+    }
 
     if (settings.m_useReverseAPI)
     {

plugins/feature/aprs/aprs.h

@@ -153,7 +153,7 @@ public:
     static const char* const m_featureId;
 
 private:
-    QThread m_thread;
+    QThread *m_thread;
     APRSWorker *m_worker;
     APRSSettings m_settings;
     QHash<ChannelAPI*, APRSSettings::AvailableChannel> m_availableChannels;

plugins/feature/aprs/aprsworker.cpp

@@ -37,7 +37,6 @@ APRSWorker::APRSWorker(APRS *aprs, WebAPIAdapterInterface *webAPIAdapterInterfac
     m_webAPIAdapterInterface(webAPIAdapterInterface),
     m_msgQueueToFeature(nullptr),
     m_msgQueueToGUI(nullptr),
-    m_running(false),
     m_socket(this)
 {
     connect(&m_socket, SIGNAL(readyRead()),this, SLOT(recv()));
@@ -55,42 +54,25 @@ APRSWorker::~APRSWorker()
     m_inputMessageQueue.clear();
 }
 
-void APRSWorker::reset()
+void APRSWorker::startWork()
-{
-    QMutexLocker mutexLocker(&m_mutex);
-    m_inputMessageQueue.clear();
-}
-
-bool APRSWorker::startWork()
 {
+    qDebug("APRSWorker::startWork");
     QMutexLocker mutexLocker(&m_mutex);
     connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
-    connect(thread(), SIGNAL(started()), this, SLOT(started()));
+    connect(thread(), SIGNAL(finished()), this, SLOT(stopWork()));
-    connect(thread(), SIGNAL(finished()), this, SLOT(finished()));
+    // Handle any messages already on the queue
-    m_running = true;
+    handleInputMessages();
-    return m_running;
-}
-
-// startWork() is called from main thread. Timers need to be started on worker thread
-void APRSWorker::started()
-{
-    disconnect(thread(), SIGNAL(started()), this, SLOT(started()));
 }
 
 void APRSWorker::stopWork()
 {
+    qDebug("APRSWorker::stopWork");
     QMutexLocker mutexLocker(&m_mutex);
-    disconnect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
-}
-
-void APRSWorker::finished()
-{
     // Close any existing connection
     if (m_socket.isOpen()) {
         m_socket.close();
     }
-    m_running = false;
+    disconnect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
-    disconnect(thread(), SIGNAL(finished()), this, SLOT(finished()));
 }
 
 void APRSWorker::handleInputMessages()

plugins/feature/aprs/aprsworker.h

@@ -59,10 +59,8 @@ public:
 
     APRSWorker(APRS *m_aprs, WebAPIAdapterInterface *webAPIAdapterInterface);
     ~APRSWorker();
-    void reset();
+    void startWork();
-    bool startWork();
     void stopWork();
-    bool isRunning() const { return m_running; }
     MessageQueue *getInputMessageQueue() { return &m_inputMessageQueue; }
     void setMessageQueueToFeature(MessageQueue *messageQueue) { m_msgQueueToFeature = messageQueue; }
     void setMessageQueueToGUI(MessageQueue *messageQueue) { m_msgQueueToGUI = messageQueue; }
@@ -75,7 +73,6 @@ private:
     MessageQueue *m_msgQueueToFeature; //!< Queue to report channel change to main feature object
     MessageQueue *m_msgQueueToGUI;
     APRSSettings m_settings;
-    bool m_running;
     QRecursiveMutex m_mutex;
     QTcpSocket m_socket;
     bool m_loggedIn;
@@ -86,8 +83,6 @@ private:
     void send(const char *data, int length);
 
 private slots:
-    void started();
-    void finished();
     void handleInputMessages();
     void connected();
     void disconnected();

plugins/feature/pertester/pertester.cpp

@@ -48,12 +48,12 @@ const char* const PERTester::m_featureIdURI = "sdrangel.feature.pertester";
 const char* const PERTester::m_featureId = "PERTester";
 
 PERTester::PERTester(WebAPIAdapterInterface *webAPIAdapterInterface) :
-    Feature(m_featureIdURI, webAPIAdapterInterface)
+    Feature(m_featureIdURI, webAPIAdapterInterface),
+    m_thread(nullptr),
+    m_worker(nullptr)
 {
     qDebug("PERTester::PERTester: webAPIAdapterInterface: %p", webAPIAdapterInterface);
     setObjectName(m_featureId);
-    m_worker = new PERTesterWorker();
-    m_worker->moveToThread(&m_thread);
     m_state = StIdle;
     m_errorMessage = "PERTester error";
     m_networkManager = new QNetworkAccessManager();
@@ -74,40 +74,48 @@ PERTester::~PERTester()
         &PERTester::networkManagerFinished
     );
     delete m_networkManager;
-    if (m_worker->isRunning()) {
+    stop();
-        stop();
-    }
-
-    delete m_worker;
 }
 
 void PERTester::start()
 {
     qDebug("PERTester::start");
 
+    m_thread = new QThread(this);
+    m_worker = new PERTesterWorker();
+    m_worker->moveToThread(m_thread);
+
+    QObject::connect(m_thread, &QThread::started, m_worker, &PERTesterWorker::startWork);
+    QObject::connect(m_thread, &QThread::finished, m_worker, &QObject::deleteLater);
+    QObject::connect(m_thread, &QThread::finished, m_thread, &QThread::deleteLater);
+ 
     m_worker->setMessageQueueToFeature(getInputMessageQueue());
     m_worker->setMessageQueueToGUI(getMessageQueueToGUI());
     m_worker->getInputMessageQueue()->push(PERTesterWorker::MsgConfigurePERTesterWorker::create(m_settings, true));
     if (m_settings.m_start == PERTesterSettings::START_IMMEDIATELY)
     {
-        bool ok = m_worker->startWork();
+        m_thread->start();
-        m_state = ok ? StRunning : StError;
+        m_state = StRunning;
     }
     else
     {
         // Wait for AOS
         m_state = StIdle;
     }
-    m_thread.start();
+    m_thread->start();
 }
 
 void PERTester::stop()
 {
     qDebug("PERTester::stop");
-    m_worker->stopWork();
     m_state = StIdle;
-    m_thread.quit();
+    if (m_thread)
-    m_thread.wait();
+    {
+        m_thread->quit();
+        m_thread->wait();
+        m_thread = nullptr;
+        m_worker = nullptr;
+    }
 }
 
 bool PERTester::handleMessage(const Message& cmd)
@@ -135,7 +143,9 @@ bool PERTester::handleMessage(const Message& cmd)
     }
     else if (MsgResetStats::match(cmd))
     {
-        m_worker->getInputMessageQueue()->push(MsgResetStats::create());
+        if (m_worker) {
+            m_worker->getInputMessageQueue()->push(MsgResetStats::create());
+        }
         return true;
     }
     else if (MsgReportWorker::match(cmd))
@@ -249,7 +259,9 @@ void PERTester::applySettings(const PERTesterSettings& settings, bool force)
     PERTesterWorker::MsgConfigurePERTesterWorker *msg = PERTesterWorker::MsgConfigurePERTesterWorker::create(
         settings, force
     );
-    m_worker->getInputMessageQueue()->push(msg);
+    if (m_worker) {
+        m_worker->getInputMessageQueue()->push(msg);
+    }
 
     if (settings.m_useReverseAPI)
     {
@@ -555,8 +567,8 @@ int PERTester::webapiActionsPost(
                 {
                     if (m_settings.m_start == PERTesterSettings::START_ON_AOS)
                     {
-                        bool ok = m_worker->startWork();
+                        m_thread->start();
-                        m_state = ok ? StRunning : StError;
+                        m_state = StRunning;
                     }
                     else if (m_settings.m_start == PERTesterSettings::START_ON_MID_PASS)
                     {
@@ -566,8 +578,8 @@ int PERTester::webapiActionsPost(
                         QDateTime losTime = QDateTime::fromString(losTimeString);
                         qint64 msecs = aosTime.msecsTo(losTime) / 2;
                         QTimer::singleShot(msecs, [this] {
-                            bool ok = m_worker->startWork();
+                            m_thread->start();
-                            m_state = ok ? StRunning : StError;
+                            m_state = StRunning;
                         });
                     }
                 }

plugins/feature/pertester/pertester.h

@@ -164,7 +164,7 @@ public:
     static const char* const m_featureId;
 
 private:
-    QThread m_thread;
+    QThread *m_thread;
     PERTesterWorker *m_worker;
     PERTesterSettings m_settings;
 

plugins/feature/pertester/pertesterworker.cpp

@@ -39,7 +39,6 @@ MESSAGE_CLASS_DEFINITION(PERTesterReport::MsgReportStats, Message)
 PERTesterWorker::PERTesterWorker() :
     m_msgQueueToFeature(nullptr),
     m_msgQueueToGUI(nullptr),
-    m_running(false),
     m_rxUDPSocket(nullptr),
     m_txUDPSocket(this),
     m_txTimer(this),
@@ -57,46 +56,27 @@ PERTesterWorker::~PERTesterWorker()
     m_inputMessageQueue.clear();
 }
 
-void PERTesterWorker::reset()
+void PERTesterWorker::startWork()
-{
-    QMutexLocker mutexLocker(&m_mutex);
-    m_inputMessageQueue.clear();
-}
-
-bool PERTesterWorker::startWork()
 {
     qDebug() << "PERTesterWorker::startWork";
     QMutexLocker mutexLocker(&m_mutex);
-    connect(thread(), SIGNAL(started()), this, SLOT(started()));
-    connect(thread(), SIGNAL(finished()), this, SLOT(finished()));
-    m_running = true;
-    return m_running;
-}
-
-// startWork() is called from main thread. Timers/sockets need to be started on worker thread
-void PERTesterWorker::started()
-{
     openUDP(m_settings);
     // Automatically restart if previous run had finished, otherwise continue
     if (m_tx >= m_settings.m_packetCount)
         resetStats();
     connect(&m_txTimer, SIGNAL(timeout()), this, SLOT(tx()));
+    connect(thread(), SIGNAL(finished()), this, SLOT(stopWork()));
     m_txTimer.start(m_settings.m_interval * 1000.0);
-    disconnect(thread(), SIGNAL(started()), this, SLOT(started()));
+    // Handle any messages already on the queue
+    handleInputMessages();
 }
 
 void PERTesterWorker::stopWork()
 {
     qDebug() << "PERTesterWorker::stopWork";
-}
-
-void PERTesterWorker::finished()
-{
     m_txTimer.stop();
     closeUDP();
     disconnect(&m_txTimer, SIGNAL(timeout()), this, SLOT(tx()));
-    disconnect(thread(), SIGNAL(finished()), this, SLOT(finished()));
-    m_running = false;
 }
 
 void PERTesterWorker::handleInputMessages()

plugins/feature/pertester/pertesterworker.h

@@ -57,10 +57,8 @@ public:
 
     PERTesterWorker();
     ~PERTesterWorker();
-    void reset();
+    void startWork();
-    bool startWork();
     void stopWork();
-    bool isRunning() const { return m_running; }
     MessageQueue *getInputMessageQueue() { return &m_inputMessageQueue; }
     void setMessageQueueToFeature(MessageQueue *messageQueue) { m_msgQueueToFeature = messageQueue; }
     void setMessageQueueToGUI(MessageQueue *messageQueue) { m_msgQueueToGUI = messageQueue; }
@@ -71,7 +69,6 @@ private:
     MessageQueue *m_msgQueueToFeature;
     MessageQueue *m_msgQueueToGUI;
     PERTesterSettings m_settings;
-    bool m_running;
     QRecursiveMutex m_mutex;
     QUdpSocket *m_rxUDPSocket;                  //!< UDP socket to receive packets on
     QUdpSocket m_txUDPSocket;
@@ -89,8 +86,6 @@ private:
     void resetStats();
 
 private slots:
-    void started();
-    void finished();
     void handleInputMessages();
     void rx();
     void tx();

plugins/feature/startracker/startracker.cpp

@@ -46,12 +46,12 @@ const char* const StarTracker::m_featureIdURI = "sdrangel.feature.startracker";
 const char* const StarTracker::m_featureId = "StarTracker";
 
 StarTracker::StarTracker(WebAPIAdapterInterface *webAPIAdapterInterface) :
-    Feature(m_featureIdURI, webAPIAdapterInterface)
+    Feature(m_featureIdURI, webAPIAdapterInterface),
+    m_thread(nullptr),
+    m_worker(nullptr)
 {
     qDebug("StarTracker::StarTracker: webAPIAdapterInterface: %p", webAPIAdapterInterface);
     setObjectName(m_featureId);
-    m_worker = new StarTrackerWorker(this, webAPIAdapterInterface);
-    m_worker->moveToThread(&m_thread);
     m_state = StIdle;
     m_errorMessage = "StarTracker error";
     m_networkManager = new QNetworkAccessManager();
@@ -92,11 +92,8 @@ StarTracker::~StarTracker()
         &StarTracker::networkManagerFinished
     );
     delete m_networkManager;
-    if (m_worker->isRunning()) {
+    stop();
-        stop();
-    }
 
-    delete m_worker;
     if (m_weather)
     {
         disconnect(m_weather, &Weather::weatherUpdated, this, &StarTracker::weatherUpdated);
@@ -110,12 +107,19 @@ void StarTracker::start()
 {
     qDebug("StarTracker::start");
 
-    m_worker->reset();
+    m_thread = new QThread(this);
+    m_worker = new StarTrackerWorker(this, m_webAPIAdapterInterface);
+    m_worker->moveToThread(m_thread);
+
+    QObject::connect(m_thread, &QThread::started, m_worker, &StarTrackerWorker::startWork);
+    QObject::connect(m_thread, &QThread::finished, m_worker, &QObject::deleteLater);
+    QObject::connect(m_thread, &QThread::finished, m_thread, &QThread::deleteLater);
+
     m_worker->setMessageQueueToFeature(getInputMessageQueue());
     m_worker->setMessageQueueToGUI(getMessageQueueToGUI());
-    bool ok = m_worker->startWork();
+    m_thread->start();
-    m_state = ok ? StRunning : StError;
+    m_thread->start();
-    m_thread.start();
+    m_state = StRunning;
 
     m_worker->getInputMessageQueue()->push(StarTrackerWorker::MsgConfigureStarTrackerWorker::create(m_settings, true));
     m_worker->getInputMessageQueue()->push(MsgSetSolarFlux::create(m_solarFlux));
@@ -124,10 +128,14 @@ void StarTracker::start()
 void StarTracker::stop()
 {
     qDebug("StarTracker::stop");
-    m_worker->stopWork();
     m_state = StIdle;
-    m_thread.quit();
+    if (m_thread)
-    m_thread.wait();
+    {
+        m_thread->quit();
+        m_thread->wait();
+        m_thread = nullptr;
+        m_worker = nullptr;
+    }
 }
 
 bool StarTracker::handleMessage(const Message& cmd)
@@ -157,7 +165,9 @@ bool StarTracker::handleMessage(const Message& cmd)
     {
         MsgSetSolarFlux& msg = (MsgSetSolarFlux&) cmd;
         m_solarFlux = msg.getFlux();
-        m_worker->getInputMessageQueue()->push(new MsgSetSolarFlux(msg));
+        if (m_worker) {
+            m_worker->getInputMessageQueue()->push(new MsgSetSolarFlux(msg));
+        }
         return true;
     }
     else if (MainCore::MsgStarTrackerDisplaySettings::match(cmd))
@@ -338,7 +348,9 @@ void StarTracker::applySettings(const StarTrackerSettings& settings, bool force)
     StarTrackerWorker::MsgConfigureStarTrackerWorker *msg = StarTrackerWorker::MsgConfigureStarTrackerWorker::create(
         settings, force
     );
-    m_worker->getInputMessageQueue()->push(msg);
+    if (m_worker) {
+        m_worker->getInputMessageQueue()->push(msg);
+    }
 
     if (settings.m_useReverseAPI)
     {
@@ -741,7 +753,9 @@ void StarTracker::weatherUpdated(float temperature, float pressure, float humidi
         m_settings.m_humidity = humidity;
     }
 
-    m_worker->getInputMessageQueue()->push(StarTrackerWorker::MsgConfigureStarTrackerWorker::create(m_settings, false));
+    if (m_worker) {
+        m_worker->getInputMessageQueue()->push(StarTrackerWorker::MsgConfigureStarTrackerWorker::create(m_settings, false));
+    }
     if (m_guiMessageQueue) {
         m_guiMessageQueue->push(MsgConfigureStarTracker::create(m_settings, false));
     }

plugins/feature/startracker/startracker.h

@@ -155,7 +155,7 @@ public:
     static const char* const m_featureId;
 
 private:
-    QThread m_thread;
+    QThread *m_thread;
     StarTrackerWorker *m_worker;
     StarTrackerSettings m_settings;
 

plugins/feature/startracker/startrackerworker.cpp

@@ -50,7 +50,6 @@ StarTrackerWorker::StarTrackerWorker(StarTracker* starTracker, WebAPIAdapterInte
     m_webAPIAdapterInterface(webAPIAdapterInterface),
     m_msgQueueToFeature(nullptr),
     m_msgQueueToGUI(nullptr),
-    m_running(false),
     m_pollTimer(this),
     m_tcpServer(nullptr),
     m_clientConnection(nullptr),
@@ -64,41 +63,22 @@ StarTrackerWorker::~StarTrackerWorker()
     m_inputMessageQueue.clear();
 }
 
-void StarTrackerWorker::reset()
+void StarTrackerWorker::startWork()
-{
-    QMutexLocker mutexLocker(&m_mutex);
-    m_inputMessageQueue.clear();
-}
-
-bool StarTrackerWorker::startWork()
 {
     QMutexLocker mutexLocker(&m_mutex);
     connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
-    connect(thread(), SIGNAL(started()), this, SLOT(started()));
+    connect(thread(), SIGNAL(finished()), this, SLOT(stopWork()));
-    connect(thread(), SIGNAL(finished()), this, SLOT(finished()));
-    m_running = true;
-    return m_running;
-}
-
-// startWork() is called from main thread. Timers/sockets need to be started on worker thread
-void StarTrackerWorker::started()
-{
     m_pollTimer.start((int)round(m_settings.m_updatePeriod*1000.0));
-    disconnect(thread(), SIGNAL(started()), this, SLOT(started()));
+    // Handle any messages already on the queue
+    handleInputMessages();
 }
 
 void StarTrackerWorker::stopWork()
 {
     QMutexLocker mutexLocker(&m_mutex);
     disconnect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
-}
-
-void StarTrackerWorker::finished()
-{
     restartServer(false, 0);
     m_pollTimer.stop();
-    disconnect(thread(), SIGNAL(finished()), this, SLOT(finished()));
-    m_running = false;
 }
 
 void StarTrackerWorker::handleInputMessages()

plugins/feature/startracker/startrackerworker.h

@@ -65,10 +65,8 @@ public:
 
     StarTrackerWorker(StarTracker* starTracker, WebAPIAdapterInterface *webAPIAdapterInterface);
     ~StarTrackerWorker();
-    void reset();
+    void startWork();
-    bool startWork();
     void stopWork();
-    bool isRunning() const { return m_running; }
     MessageQueue *getInputMessageQueue() { return &m_inputMessageQueue; }
     void setMessageQueueToFeature(MessageQueue *messageQueue) { m_msgQueueToFeature = messageQueue; }
     void setMessageQueueToGUI(MessageQueue *messageQueue) { m_msgQueueToGUI = messageQueue; }
@@ -81,7 +79,6 @@ private:
     MessageQueue *m_msgQueueToFeature; //!< Queue to report channel change to main feature object
     MessageQueue *m_msgQueueToGUI;
     StarTrackerSettings m_settings;
-    bool m_running;
     QRecursiveMutex m_mutex;
     QTimer m_pollTimer;
     QTcpServer *m_tcpServer;
@@ -106,8 +103,6 @@ private:
     );
 
 private slots:
-    void started();
-    void finished();
     void handleInputMessages();
     void update();
     void acceptConnection();