THREAD_CLEAN_PART2: Assure correct terminate()/isTerminated(delay)/delete sequence +

Removed the NotifyQueue between DemodulatorInstance participants, actually not needed
since DemodulatorInstance::IsTerminated() is explicitly called on some events for cleanups

DELETE_CLEANUP: properly nullify deleted pointers when needed

src/CubicSDR.cpp

@@ -293,43 +293,63 @@ int CubicSDR::OnExit() {
     demodMgr.terminateAll();
     
     std::cout << "Terminating SDR thread.." << std::endl;
-    if (!sdrThread->isTerminated()) {
-        sdrThread->terminate();
-        if (t_SDR) {
-            t_SDR->join();
-        }
+    sdrThread->terminate();
+    sdrThread->isTerminated(1000);
+   
+    if (t_SDR) {
+       t_SDR->join();
     }
+   
     std::cout << "Terminating SDR post-processing thread.." << std::endl;
     sdrPostThread->terminate();
-    t_PostSDR->join();
     
     std::cout << "Terminating Visual Processor threads.." << std::endl;
     spectrumVisualThread->terminate();
-    t_SpectrumVisual->join();
-
     demodVisualThread->terminate();
-    t_DemodVisual->join();
 
-    //Poor man join
+    //Wait nicely
     sdrPostThread->isTerminated(1000);
     spectrumVisualThread->isTerminated(1000);
     demodVisualThread->isTerminated(1000);
 
+    //Then join the thread themselves
+    t_PostSDR->join();
+    t_DemodVisual->join();
+    t_SpectrumVisual->join();
+
+    //Now only we can delete
     delete sdrThread;
+    sdrThread = nullptr;
 
     delete sdrPostThread;
+    sdrPostThread = nullptr;
+
     delete t_PostSDR;
+    t_PostSDR = nullptr;
 
     delete t_SpectrumVisual;
+    t_SpectrumVisual = nullptr;
+
     delete spectrumVisualThread;
+    spectrumVisualThread = nullptr;
+
     delete t_DemodVisual;
+    t_DemodVisual = nullptr;
+
     delete demodVisualThread;
+    demodVisualThread = nullptr;
     
     delete pipeIQVisualData;
+    pipeIQVisualData = nullptr;
+
     delete pipeAudioVisualData;
+    pipeAudioVisualData = nullptr;
+
     delete pipeSDRIQData;
+    pipeSDRIQData = nullptr;
 
     delete m_glContext;
+    m_glContext = nullptr;
 
 #ifdef __APPLE__
     AudioThread::deviceCleanup();
@@ -427,6 +447,7 @@ void CubicSDR::sdrThreadNotify(SDRThread::SDRThreadState state, std::string mess
     if (state == SDRThread::SDR_THREAD_TERMINATED) {
         t_SDR->join();
         delete t_SDR;
+        t_SDR = nullptr;
     }
     if (state == SDRThread::SDR_THREAD_FAILED) {
         notifyMessage = message;
@@ -532,14 +553,15 @@ void CubicSDR::stopDevice(bool store) {
     }
     sdrThread->setDevice(nullptr);
 
-    if (!sdrThread->isTerminated()) {
-        sdrThread->terminate();
-        if (t_SDR) {
-            t_SDR->join();
-            delete t_SDR;
-            t_SDR = nullptr;
-        }
+    sdrThread->terminate();
+    sdrThread->isTerminated(1000);
+
+    if (t_SDR) {
+        t_SDR->join();
+        delete t_SDR;
+        t_SDR = nullptr;
     }
+    
 }
 
 void CubicSDR::reEnumerateDevices() {
@@ -550,12 +572,14 @@ void CubicSDR::reEnumerateDevices() {
 }
 
 void CubicSDR::setDevice(SDRDeviceInfo *dev) {
-    if (!sdrThread->isTerminated()) {
-        sdrThread->terminate();
-        if (t_SDR) {
-            t_SDR->join();
-            delete t_SDR;
-        }
+
+    sdrThread->terminate();
+    sdrThread->isTerminated(1000);
+    
+    if (t_SDR) {
+       t_SDR->join();
+       delete t_SDR;
+       t_SDR = nullptr;
     }
     
     for (SoapySDR::Kwargs::const_iterator i = settingArgs.begin(); i != settingArgs.end(); i++) {
@@ -872,17 +896,27 @@ RigThread *CubicSDR::getRigThread() {
 
 void CubicSDR::initRig(int rigModel, std::string rigPort, int rigSerialRate) {
     if (rigThread) {
-        if (!rigThread->isTerminated()) {
-            rigThread->terminate();
-        }
+
+        rigThread->terminate();
+        rigThread->isTerminated(1000);
+    }
+
+    if (t_Rig && t_Rig->joinable()) {
+        t_Rig->join();
+    }
+
+    //now we can delete
+    if (rigThread) {
+
         delete rigThread;
         rigThread = nullptr;
     }
-    if (t_Rig && t_Rig->joinable()) {
-        t_Rig->join();
+    if (t_Rig) {
+      
         delete t_Rig;
         t_Rig = nullptr;
     }
+
     rigThread = new RigThread();
     rigThread->initRig(rigModel, rigPort, rigSerialRate);
     rigThread->setControlMode(wxGetApp().getConfig()->getRigControlMode());
@@ -899,14 +933,24 @@ void CubicSDR::stopRig() {
     }
     
     if (rigThread) {
-        if (!rigThread->isTerminated()) {
-            rigThread->terminate();
-        }
+        
+        rigThread->terminate();
+        rigThread->isTerminated(1000);
+    }
+
+    if (t_Rig && t_Rig->joinable()) {
+        t_Rig->join();   
+    }
+
+    //now we can delete
+    if (rigThread) {
+
         delete rigThread;
         rigThread = nullptr;
     }
-    if (t_Rig && t_Rig->joinable()) {
-        t_Rig->join();
+
+    if (t_Rig) {
+       
         delete t_Rig;
         t_Rig = nullptr;
     }

src/CubicSDR.h

@@ -180,10 +180,10 @@ private:
 
     DemodulatorMgr demodMgr;
 
-    long long frequency;
-    long long offset;
-    int ppm, snap;
-    long long sampleRate;
+    std::atomic_llong frequency;
+    std::atomic_llong offset;
+    std::atomic_int ppm, snap;
+    std::atomic_llong sampleRate;
     std::atomic_bool agcMode;
 
     SDRThread *sdrThread;
@@ -224,7 +224,7 @@ private:
     std::atomic_bool soloMode;
     SDRDeviceInfo *stoppedDev;
 #ifdef USE_HAMLIB
-    RigThread *rigThread;
+    RigThread* rigThread;
     std::thread *t_Rig;
 #endif
 };

src/IOThread.cpp

@@ -1,4 +1,5 @@
 #include "IOThread.h"
+#include <typeinfo>
 
 std::mutex ReBufferGC::g_mutex;
 std::set<ReferenceCounter *> ReBufferGC::garbage;
@@ -122,5 +123,7 @@ bool IOThread::isTerminated(int waitMs) {
         }
     }
 
+    std::cout << "ERROR: thread '" << typeid(*this).name() << "' has not terminated in time ! (> " << waitMs << " ms)" << std::endl;
+
     return terminated.load();
 }

src/audio/AudioThread.cpp

@@ -12,7 +12,7 @@ std::map<int, int> AudioThread::deviceSampleRate;
 std::map<int, std::thread *> AudioThread::deviceThread;
 
 AudioThread::AudioThread() : IOThread(),
-        currentInput(NULL), inputQueue(NULL), nBufferFrames(1024), threadQueueNotify(NULL), sampleRate(0) {
+        currentInput(NULL), inputQueue(NULL), nBufferFrames(1024), sampleRate(0) {
 
 	audioQueuePtr.store(0); 
 	underflowCount.store(0);
@@ -378,7 +378,6 @@ void AudioThread::run() {
 //    std::cout << "Audio thread started." << std::endl;
 
     inputQueue = static_cast<AudioThreadInputQueue *>(getInputQueue("AudioDataInput"));
-    threadQueueNotify = static_cast<DemodulatorThreadCommandQueue*>(getOutputQueue("NotifyQueue"));
     
     while (!stopping) {
         AudioThreadCommand command;
@@ -420,12 +419,7 @@ void AudioThread::run() {
             e.printMessage();
         }
     }
-    
-    if (threadQueueNotify != NULL) {
-        DemodulatorThreadCommand tCmd(DemodulatorThreadCommand::DEMOD_THREAD_CMD_AUDIO_TERMINATED);
-        tCmd.context = this;
-        threadQueueNotify->push(tCmd);
-    }
+
 //    std::cout << "Audio thread done." << std::endl;
 }
 

src/audio/AudioThread.h

@@ -86,7 +86,6 @@ private:
     RtAudio::StreamOptions opts;
     RtAudio::StreamParameters parameters;
     AudioThreadCommandQueue cmdQueue;
-    DemodulatorThreadCommandQueue* threadQueueNotify;
     int sampleRate;
 
 public:

src/demod/DemodDefs.h

@@ -10,29 +10,7 @@
 #include "IOThread.h"
 
 class DemodulatorThread;
-class DemodulatorThreadCommand {
-public:
-    enum DemodulatorThreadCommandEnum {
-        DEMOD_THREAD_CMD_NULL,
-        DEMOD_THREAD_CMD_DEMOD_PREPROCESS_TERMINATED,
-        DEMOD_THREAD_CMD_DEMOD_TERMINATED,
-        DEMOD_THREAD_CMD_AUDIO_TERMINATED
-    };
 
-    DemodulatorThreadCommand() :
-            cmd(DEMOD_THREAD_CMD_NULL), context(NULL), llong_value(0) {
-
-    }
-
-    DemodulatorThreadCommand(DemodulatorThreadCommandEnum cmd) :
-            cmd(cmd), context(NULL), llong_value(0) {
-
-    }
-
-    DemodulatorThreadCommandEnum cmd;
-    void *context;
-    long long llong_value;
-};
 
 class DemodulatorThreadControlCommand {
 public:
@@ -120,5 +98,4 @@ public:
 
 typedef ThreadQueue<DemodulatorThreadIQData *> DemodulatorThreadInputQueue;
 typedef ThreadQueue<DemodulatorThreadPostIQData *> DemodulatorThreadPostInputQueue;
-typedef ThreadQueue<DemodulatorThreadCommand> DemodulatorThreadCommandQueue;
 typedef ThreadQueue<DemodulatorThreadControlCommand> DemodulatorThreadControlCommandQueue;

src/demod/DemodulatorInstance.cpp

@@ -51,14 +51,12 @@ DemodulatorInstance::DemodulatorInstance() {
 
     pipeIQInputData = new DemodulatorThreadInputQueue;
     pipeIQDemodData = new DemodulatorThreadPostInputQueue;
-    pipeDemodNotify = new DemodulatorThreadCommandQueue;
     
     audioThread = new AudioThread();
             
     demodulatorPreThread = new DemodulatorPreThread(this);
     demodulatorPreThread->setInputQueue("IQDataInput",pipeIQInputData);
     demodulatorPreThread->setOutputQueue("IQDataOutput",pipeIQDemodData);
-    demodulatorPreThread->setOutputQueue("NotifyQueue",pipeDemodNotify);
             
     pipeAudioData = new AudioThreadInputQueue;
     threadQueueControl = new DemodulatorThreadControlCommandQueue;
@@ -66,11 +64,9 @@ DemodulatorInstance::DemodulatorInstance() {
     demodulatorThread = new DemodulatorThread(this);
     demodulatorThread->setInputQueue("IQDataInput",pipeIQDemodData);
     demodulatorThread->setInputQueue("ControlQueue",threadQueueControl);
-    demodulatorThread->setOutputQueue("NotifyQueue",pipeDemodNotify);
     demodulatorThread->setOutputQueue("AudioDataOutput", pipeAudioData);
 
     audioThread->setInputQueue("AudioDataInput", pipeAudioData);
-    audioThread->setOutputQueue("NotifyQueue", pipeDemodNotify);
 }
 
 DemodulatorInstance::~DemodulatorInstance() {
@@ -82,7 +78,6 @@ DemodulatorInstance::~DemodulatorInstance() {
     delete demodulatorPreThread;
     delete pipeIQInputData;
     delete pipeIQDemodData;
-    delete pipeDemodNotify;
     delete threadQueueControl;
     delete pipeAudioData;
 }
@@ -151,56 +146,59 @@ void DemodulatorInstance::setLabel(std::string labelStr) {
 }
 
 bool DemodulatorInstance::isTerminated() {
-    while (!pipeDemodNotify->empty()) {
-        DemodulatorThreadCommand cmd;
-        pipeDemodNotify->pop(cmd);
-
-        switch (cmd.cmd) {
-        case DemodulatorThreadCommand::DEMOD_THREAD_CMD_AUDIO_TERMINATED:
-            if (t_Audio) {
-                t_Audio->join();
-               
-                delete t_Audio;
-                t_Audio = nullptr;
-            }
-            break;
-        case DemodulatorThreadCommand::DEMOD_THREAD_CMD_DEMOD_TERMINATED:
-            if (t_Demod) {
-                #ifdef __APPLE__
-                pthread_join(t_Demod, nullptr);
-                #else
-                t_Demod->join();
-                delete t_Demod;
-                #endif
-                t_Demod = nullptr;
-            }
-#if ENABLE_DIGITAL_LAB
-            if (activeOutput) {
-                closeOutput();
-            }
-#endif
-            break;
-        case DemodulatorThreadCommand::DEMOD_THREAD_CMD_DEMOD_PREPROCESS_TERMINATED:
-            if (t_PreDemod) {
-                #ifdef __APPLE__
-                pthread_join(t_PreDemod, NULL);
-                #else
-                t_PreDemod->join();
-                delete t_PreDemod;
-                #endif
-                t_PreDemod = nullptr;
-            }
-            break;
-        default:
-            break;
-        }
-    }
 
     //
     bool audioTerminated = audioThread->isTerminated();
     bool demodTerminated = demodulatorThread->isTerminated();
     bool preDemodTerminated = demodulatorPreThread->isTerminated();
 
+
+    //Cleanup the worker threads, if the threads are indeed terminated
+    if (audioTerminated) {
+
+        if (t_Audio) {
+
+            t_Audio->join();
+
+            delete t_Audio;
+            t_Audio = nullptr;
+        }
+    }
+
+    if (demodTerminated) {
+
+        if (t_Demod) {
+
+#ifdef __APPLE__
+            pthread_join(t_Demod, nullptr);
+#else
+            t_Demod->join();
+            delete t_Demod;
+#endif
+            t_Demod = nullptr;
+        }
+#if ENABLE_DIGITAL_LAB
+        if (activeOutput) {
+            closeOutput();
+        }
+#endif
+    }
+
+    if (preDemodTerminated) {
+
+        if (t_PreDemod) {
+
+#ifdef __APPLE__
+            pthread_join(t_PreDemod, NULL);
+#else
+            t_PreDemod->join();
+            delete t_PreDemod;
+#endif
+            t_PreDemod = nullptr;
+        }
+    }
+
+   
     bool terminated = audioTerminated && demodTerminated && preDemodTerminated;
 
     return terminated;

src/demod/DemodulatorInstance.h

@@ -47,8 +47,6 @@ public:
 
     void setVisualOutputQueue(DemodulatorThreadOutputQueue *tQueue);
 
-    DemodulatorThreadCommandQueue *getCommandQueue();
-
     void run();
     void terminate();
     std::string getLabel();
@@ -131,7 +129,6 @@ protected:
     DemodulatorThreadInputQueue* pipeIQInputData;
     DemodulatorThreadPostInputQueue* pipeIQDemodData;
     AudioThreadInputQueue *pipeAudioData;
-    DemodulatorThreadCommandQueue* pipeDemodNotify;
     DemodulatorPreThread *demodulatorPreThread;
     DemodulatorThread *demodulatorThread;
     DemodulatorThreadControlCommandQueue *threadQueueControl;

src/demod/DemodulatorMgr.cpp

@@ -148,14 +148,18 @@ void DemodulatorMgr::deleteThread(DemodulatorInstance *demod) {
     if (i != demods.end()) {
         demods.erase(i);
     }
+
+    //Ask for termination
     demod->terminate();
 
+    //Do not cleanup immediatly
     demods_deleted.push_back(demod);
 }
 
-std::vector<DemodulatorInstance *> *DemodulatorMgr::getDemodulatorsAt(long long freq, int bandwidth) {
+std::vector<DemodulatorInstance *> DemodulatorMgr::getDemodulatorsAt(long long freq, int bandwidth) {
     std::lock_guard < std::recursive_mutex > lock(demods_busy);
-    std::vector<DemodulatorInstance *> *foundDemods = new std::vector<DemodulatorInstance *>();
+    
+    std::vector<DemodulatorInstance *> foundDemods;
 
     for (int i = 0, iMax = demods.size(); i < iMax; i++) {
         DemodulatorInstance *testDemod = demods[i];
@@ -167,7 +171,7 @@ std::vector<DemodulatorInstance *> *DemodulatorMgr::getDemodulatorsAt(long long
         long long halfBuffer = bandwidth / 2;
 
         if ((freq <= (freqTest + ((testDemod->getDemodulatorType() != "LSB")?halfBandwidthTest:0) + halfBuffer)) && (freq >= (freqTest - ((testDemod->getDemodulatorType() != "USB")?halfBandwidthTest:0) - halfBuffer))) {
-            foundDemods->push_back(testDemod);
+            foundDemods.push_back(testDemod);
         }
     }
 

src/demod/DemodulatorMgr.h

@@ -14,7 +14,7 @@ public:
     DemodulatorInstance *newThread();
     std::vector<DemodulatorInstance *> &getDemodulators();
     std::vector<DemodulatorInstance *> getOrderedDemodulators(bool actives = true);
-    std::vector<DemodulatorInstance *> *getDemodulatorsAt(long long freq, int bandwidth);
+    std::vector<DemodulatorInstance *> getDemodulatorsAt(long long freq, int bandwidth);
     DemodulatorInstance *getPreviousDemodulator(DemodulatorInstance *demod, bool actives = true);
     DemodulatorInstance *getNextDemodulator(DemodulatorInstance *demod, bool actives = true);
     DemodulatorInstance *getLastDemodulator();

src/demod/DemodulatorPreThread.cpp

@@ -9,7 +9,7 @@
 #include "CubicSDR.h"
 #include "DemodulatorInstance.h"
 
-DemodulatorPreThread::DemodulatorPreThread(DemodulatorInstance *parent) : IOThread(), iqResampler(NULL), iqResampleRatio(1), cModem(nullptr), cModemKit(nullptr), iqInputQueue(NULL), iqOutputQueue(NULL), threadQueueNotify(NULL)
+DemodulatorPreThread::DemodulatorPreThread(DemodulatorInstance *parent) : IOThread(), iqResampler(NULL), iqResampleRatio(1), cModem(nullptr), cModemKit(nullptr), iqInputQueue(NULL), iqOutputQueue(NULL)
  {
 	initialized.store(false);
     this->parent = parent;
@@ -58,7 +58,6 @@ void DemodulatorPreThread::run() {
 
     iqInputQueue = static_cast<DemodulatorThreadInputQueue*>(getInputQueue("IQDataInput"));
     iqOutputQueue = static_cast<DemodulatorThreadPostInputQueue*>(getOutputQueue("IQDataOutput"));
-    threadQueueNotify = static_cast<DemodulatorThreadCommandQueue*>(getOutputQueue("NotifyQueue"));
     
     std::vector<liquid_float_complex> in_buf_data;
     std::vector<liquid_float_complex> out_buf_data;
@@ -276,11 +275,6 @@ void DemodulatorPreThread::run() {
         tmp->decRefCount();
     }
     buffers.purge();
-
-    DemodulatorThreadCommand tCmd(DemodulatorThreadCommand::DEMOD_THREAD_CMD_DEMOD_PREPROCESS_TERMINATED);
-    tCmd.context = this;
-    threadQueueNotify->push(tCmd);
-//    std::cout << "Demodulator preprocessor thread done." << std::endl;
 }
 
 void DemodulatorPreThread::setDemodType(std::string demodType) {
@@ -346,12 +340,22 @@ void DemodulatorPreThread::terminate() {
     iqInputQueue->push(inp);
     DemodulatorWorkerThreadCommand command(DemodulatorWorkerThreadCommand::DEMOD_WORKER_THREAD_CMD_NULL);
     workerQueue->push(command);
+    
     workerThread->terminate();
+    workerThread->isTerminated(1000);
+
     t_Worker->join();
     delete t_Worker;
+    t_Worker = nullptr;
+
     delete workerThread;
+    workerThread = nullptr;
+
     delete workerResults;
+    workerResults = nullptr;
+
     delete workerQueue;
+    workerQueue = nullptr;
 }
 
 Modem *DemodulatorPreThread::getModem() {

src/demod/DemodulatorPreThread.h

@@ -79,5 +79,4 @@ protected:
 
     DemodulatorThreadInputQueue* iqInputQueue;
     DemodulatorThreadPostInputQueue* iqOutputQueue;
-    DemodulatorThreadCommandQueue* threadQueueNotify;
 };

src/demod/DemodulatorThread.cpp

@@ -69,8 +69,7 @@ void DemodulatorThread::run() {
     iqInputQueue = static_cast<DemodulatorThreadPostInputQueue*>(getInputQueue("IQDataInput"));
     audioOutputQueue = static_cast<AudioThreadInputQueue*>(getOutputQueue("AudioDataOutput"));
     threadQueueControl = static_cast<DemodulatorThreadControlCommandQueue *>(getInputQueue("ControlQueue"));
-    threadQueueNotify = static_cast<DemodulatorThreadCommandQueue*>(getOutputQueue("NotifyQueue"));
-    
+     
     ModemIQData modemData;
     
     while (!stopping) {
@@ -290,13 +289,6 @@ void DemodulatorThread::run() {
     }
     outputBuffers.purge();
     
-    //Guard the cleanup of audioVisOutputQueue properly.
-    std::lock_guard < std::mutex > lock(m_mutexAudioVisOutputQueue);
-    
-    DemodulatorThreadCommand tCmd(DemodulatorThreadCommand::DEMOD_THREAD_CMD_DEMOD_TERMINATED);
-    tCmd.context = this;
-    threadQueueNotify->push(tCmd);
-    
 //    std::cout << "Demodulator thread done." << std::endl;
 }
 

src/demod/DemodulatorThread.h

@@ -56,7 +56,6 @@ protected:
     AudioThreadInputQueue *audioOutputQueue = nullptr;
     DemodulatorThreadOutputQueue* audioVisOutputQueue = nullptr;
     DemodulatorThreadControlCommandQueue *threadQueueControl = nullptr;
-    DemodulatorThreadCommandQueue* threadQueueNotify = nullptr;
 
     //protects the audioVisOutputQueue dynamic binding change at runtime (in DemodulatorMgr)
     mutable std::mutex m_mutexAudioVisOutputQueue;

src/util/GLFont.cpp

@@ -400,7 +400,6 @@ void GLFont::loadFontOnce() {
         }
 
         //2) then load from memory
-        lodepng::State state;
         unsigned error = lodepng::decode(image, imgWidth, imgHeight, raw_image, png_size);
 
         delete[] raw_image;

src/visual/WaterfallCanvas.cpp

@@ -492,7 +492,7 @@ void WaterfallCanvas::OnIdle(wxIdleEvent &event) {
 void WaterfallCanvas::updateHoverState() {
     long long freqPos = getFrequencyAt(mouseTracker.getMouseX());
     
-    std::vector<DemodulatorInstance *> *demodsHover = wxGetApp().getDemodMgr().getDemodulatorsAt(freqPos, 15000);
+    std::vector<DemodulatorInstance *> demodsHover = wxGetApp().getDemodMgr().getDemodulatorsAt(freqPos, 15000);
     
     wxGetApp().getDemodMgr().setActiveDemodulator(NULL);
     
@@ -505,13 +505,13 @@ void WaterfallCanvas::updateHoverState() {
         } else {
             setStatusText("Click and drag to set the current demodulator range.");
         }
-    } else if (demodsHover->size() && !shiftDown) {
+    } else if (demodsHover.size() && !shiftDown) {
         long near_dist = getBandwidth();
         
         DemodulatorInstance *activeDemodulator = NULL;
         
-        for (int i = 0, iMax = demodsHover->size(); i < iMax; i++) {
-            DemodulatorInstance *demod = (*demodsHover)[i];
+        for (int i = 0, iMax = demodsHover.size(); i < iMax; i++) {
+            DemodulatorInstance *demod = demodsHover[i];
             long long freqDiff = demod->getFrequency() - freqPos;
             long halfBw = (demod->getBandwidth() / 2);
             long long currentBw = getBandwidth();
@@ -574,18 +574,18 @@ void WaterfallCanvas::updateHoverState() {
             mouseTracker.setHorizDragLock(false);
             setStatusText("Click and drag to change demodulator frequency; SPACE or numeric key for direct input. [, ] to nudge, M for mute, D to delete, C to center, E to edit label.");
         }
-    } else {
+    }
+    else {
         SetCursor(wxCURSOR_CROSS);
         nextDragState = WF_DRAG_NONE;
         if (shiftDown) {
             setStatusText("Click to create a new demodulator or hold ALT to drag range, SPACE or numeric key for direct center frequency input.");
-        } else {
+        }
+        else {
             setStatusText(
-                          "Click to set active demodulator frequency or hold ALT to drag range; hold SHIFT to create new.  Right drag or wheel to Zoom.  Arrow keys to navigate/zoom, C to center.");
+                "Click to set active demodulator frequency or hold ALT to drag range; hold SHIFT to create new.  Right drag or wheel to Zoom.  Arrow keys to navigate/zoom, C to center.");
         }
     }
-    
-    delete demodsHover;
 }
 
 void WaterfallCanvas::OnMouseMoved(wxMouseEvent& event) {