Make processing queues timed-push, to be able to escape deadlocks. Rollback 'restart device when blocked' that is ineffective in practice.

src/process/ScopeVisualProcessor.cpp

@@ -5,6 +5,10 @@
 #include <cstring>
 #include <string>
 
+//2s
+#define MAX_BLOCKING_DURATION_MICROS (2000 * 1000)
+
+
 ScopeVisualProcessor::ScopeVisualProcessor(): outputBuffers("ScopeVisualProcessorBuffers") {
     scopeEnabled.store(true);
     spectrumEnabled.store(true);
@@ -116,7 +120,7 @@ void ScopeVisualProcessor::process() {
             }
 
             renderData->spectrum = false;
-            distribute(renderData);
+            distribute(renderData, MAX_BLOCKING_DURATION_MICROS, "renderData");
         }
         
         if (spectrumEnabled) {
@@ -212,7 +216,7 @@ void ScopeVisualProcessor::process() {
             renderData->fft_size = fftSize/2;
             renderData->spectrum = true;
 
-            distribute(renderData);
+            distribute(renderData, MAX_BLOCKING_DURATION_MICROS, "renderData");
         } 
     } //end if try_pop()
 }

src/process/SpectrumVisualProcessor.cpp

@@ -7,6 +7,10 @@
 //50 ms
 #define HEARTBEAT_CHECK_PERIOD_MICROS (50 * 1000) 
 
+//2s
+#define MAX_BLOCKING_DURATION_MICROS (2000 * 1000)
+
+
 SpectrumVisualProcessor::SpectrumVisualProcessor() : outputBuffers("SpectrumVisualProcessorBuffers") {
     lastInputBandwidth = 0;
     lastBandwidth = 0;
@@ -592,7 +596,7 @@ void SpectrumVisualProcessor::process() {
             output->centerFreq = centerFreq;
             output->bandwidth = bandwidth;
 
-            distribute(output);
+            distribute(output, MAX_BLOCKING_DURATION_MICROS, "output");
         }
     }