no pointers, just bytes buffers of fixed size

src/asynStreamGeneratorDriver.h

@@ -2,7 +2,7 @@
 #define asynStreamGeneratorDriver_H
 
 #include "asynPortDriver.h"
-#include <epicsRingPointer.h>
+#include <epicsRingBytes.h>
 #include <librdkafka/rdkafka.h>
 
 /*******************************************************************************
@@ -62,8 +62,9 @@ struct __attribute__((__packed__)) NormalisedEvent {
     uint8_t source;
     uint32_t pixelId;
 
-    inline NormalisedEvent(uint64_t timestamp, uint8_t source, uint32_t pixelId)
-        : timestamp(timestamp), source(source), pixelId(pixelId){};
+    // inline NormalisedEvent(uint64_t timestamp, uint8_t source, uint32_t
+    // pixelId)
+    //     : timestamp(timestamp), source(source), pixelId(pixelId){};
 };
 
 /*******************************************************************************
@@ -140,13 +141,13 @@ class asynStreamGeneratorDriver : public asynPortDriver {
     const bool kafkaEnabled;
     const int kafkaMaxPacketSize;
 
-    epicsRingPointer<NormalisedEvent> udpQueue;
+    epicsRingBytesId udpQueue;
 
-    epicsRingPointer<NormalisedEvent> monitorQueue;
+    epicsRingBytesId monitorQueue;
     rd_kafka_t *monitorProducer;
     const char *monitorTopic;
 
-    epicsRingPointer<NormalisedEvent> detectorQueue;
+    epicsRingBytesId detectorQueue;
     rd_kafka_t *detectorProducer;
     const char *detectorTopic;
 
@@ -155,7 +156,10 @@ class asynStreamGeneratorDriver : public asynPortDriver {
     asynStatus createInt32Param(asynStatus status, char *name, int *variable,
                                 epicsInt32 initialValue = 0);
 
-    inline void queueForKafka(NormalisedEvent *ne);
+    inline void queueForKafka(NormalisedEvent &&ne);
+
+    void produce(epicsRingBytesId eventQueue, rd_kafka_t *kafkaProducer,
+                 const char *topic, const char *source);
 };
 
 #endif