StimBuff: make start/stop virtual;

We can now have the derived StimBuff class implement its own
start()/stop() preamble and epilogue.

include/user/stimulusBuffer.h

@@ -67,7 +67,7 @@ public:
 	StimulusBuffer& operator=(StimulusBuffer&&) = default;
 
 	// Control methods
-	void start()
+	virtual void start()
 	{
 		std::cout << __func__ << ": Starting stimulus buffer for device "
 			<< deviceAttachmentSpec.deviceSelector << std::endl;
@@ -76,7 +76,7 @@ public:
 		scheduleNextTimeout();
 	}
 
-	void stop();
+	virtual void stop();
 
 protected:
 	// Virtual functions for derived classes to override

stimBuffApis/livoxGen1/pcloudStimulusBuffer.cpp

@@ -32,6 +32,22 @@ ioUringAssemblyEngine(*this)
 {
 }
 
+void PcloudStimulusBuffer::start()
+{
+	// Call ioUringAssemblyEngine setup() as the final step
+	// ioUringAssemblyEngine.setup();
+	// Call base class start() as the final step
+	StimulusBuffer::start();
+}
+
+void PcloudStimulusBuffer::stop()
+{
+	// Call base class stop() as the first step
+	StimulusBuffer::stop();
+	// Call ioUringAssemblyEngine stop() as the final step
+	// ioUringAssemblyEngine.finalize();
+}
+
 void PcloudStimulusBuffer::stimFrameProductionTimesliceInd()
 {
 	// Release the spinlock for now

stimBuffApis/livoxGen1/pcloudStimulusBuffer.h

@@ -40,6 +40,10 @@ public:
 	PcloudStimulusBuffer(PcloudStimulusBuffer&&) = default;
 	PcloudStimulusBuffer& operator=(PcloudStimulusBuffer&&) = default;
 
+	// Control methods
+	void start() override;
+	void stop() override;
+
 protected:
 	void stimFrameProductionTimesliceInd() override;