OClCollMeshEngn,PcloudStimProd: port to sscl::co coros

We've now ported the OpenClCollMeshEngn and PcloudStimProd::produceFrameReq
portions of the Livox pipeline to coros.

stimBuffApis/livoxGen1/pcloudStimulusProducer.h

@@ -3,11 +3,12 @@
 
 #include <functional>
 #include <atomic>
+#include <optional>
+#include <exception>
 #include <user/stimulusProducer.h>
 #include <user/stimulusFrame.h>
 #include <livoxProto1/device.h>
-#include <spinscale/cps/asynchronousContinuation.h>
-#include <spinscale/cps/callback.h>
+#include <spinscale/co/invokers.h>
 #include <user/stagingBuffer.h>
 #include "ioUringAssemblyEngine.h"
 #include "livoxPcloudFrameDumper.h"
@@ -83,12 +84,13 @@ public:
 protected:
 	void stimFrameProductionTimesliceInd() override;
 
-	// Callback function type for produceFrameReq
-	typedef std::function<void()> produceFrameReqCbFn;
+	void holdProduceFrameCReq();
+
+	sscl::co::NonViralNonPostingInvoker produceFrameCReq(
+		std::exception_ptr& exceptionPtr,
+		std::function<void()> completion);
 
 public:
-	void produceFrameReq(sscl::cps::Callback<produceFrameReqCbFn> callback);
-
 	size_t nDgramsPerStagingBufferFrame;
 	std::shared_ptr<livoxProto1::Device> device;
 	PcloudFormatDesc formatDesc;
@@ -111,8 +113,8 @@ public:
 	std::atomic<std::shared_ptr<PcloudDarkAmbienceStimulusBuffer>>
 		darkAmbienceStimulusBuffer;
 
-private:
-	class ProduceFrameReq;
+	std::optional<sscl::co::NonViralNonPostingInvoker> activeProduceFrameInvoker;
+	std::exception_ptr produceFrameExceptionPtr;
 };
 
 } // namespace stim_buff