fixed slot sequence safety check added

devicehandlers/FixedSlotSequence.cpp

@@ -1,5 +1,6 @@
 #include <framework/devicehandlers/FixedSlotSequence.h>
 #include <framework/serviceinterface/ServiceInterfaceStream.h>
+#include <cstdlib>
 
 FixedSlotSequence::FixedSlotSequence(uint32_t setLengthMs) :
 		slotLengthMs(setLengthMs) {
@@ -87,6 +88,14 @@ uint32_t FixedSlotSequence::getLengthMs() const {
 }
 
 ReturnValue_t FixedSlotSequence::checkSequence() const {
+	if(slotList.empty()) {
+	    error << "Fixed Slot Sequence: Slot list is empty!" << std::endl;
+	    // does check sequence have to be const?
+	    // if I want to check a class, I need the ability to set
+	    // internal class states.
+	    //isEmpty = true;
+	    std::exit(0);
+	}
     // Iterate through slotList and check successful creation.
 	// Checks if timing is ok (must be ascending) and if all handlers were found.
 	auto slotIt = slotList.begin();

devicehandlers/FixedSlotSequence.h

@@ -3,6 +3,7 @@
 
 #include <framework/devicehandlers/FixedSequenceSlot.h>
 #include <framework/objectmanager/SystemObject.h>
+#include <framework/returnvalues/HasReturnvaluesIF.h>
 #include <list>
 #include <set>
 
@@ -23,7 +24,6 @@ using SlotListIter = std::multiset<FixedSequenceSlot>::iterator;
 class FixedSlotSequence {
 public:
 
-
 	/**
 	 * @brief	The constructor of the FixedSlotSequence object.
 	 *
@@ -127,6 +127,8 @@ protected:
 	SlotList slotList;
 
 	uint32_t slotLengthMs;
+
+	bool isEmpty = false;
 };
 
 #endif /* FIXEDSLOTSEQUENCE_H_ */

osal/FreeRTOS/FixedTimeslotTask.cpp

@@ -112,7 +112,6 @@ void FixedTimeslotTask::taskFunctionality() {
 			vTaskDelayUntil(&xLastWakeTime, interval);
 			//TODO deadline missed check
 		}
-
 	}
 }