FreeRTOS - Task Priorities
What is wrong with this code snippet?
TaskHandle_t xTask2 = NULL; vTaskPrioritySet(xTask2, 4);
What is wrong with this code snippet?
medium📝 Debug Q14 of 15
Step-by-Step Solution
Solution:
Step 1: Check the task handle value
The variablexTask2is set to NULL, meaning it does not point to a valid task.Step 2: Understand effect of NULL handle
CallingvTaskPrioritySet()with a NULL handle leads to undefined behavior or runtime error because no valid task exists to change priority.Final Answer:
xTask2 is NULL, so setting priority causes undefined behavior. -> Option DQuick Check:
NULL task handle causes error [OK]
Quick Trick: Never pass NULL as task handle to vTaskPrioritySet [OK]
Common Mistakes:
- Ignoring NULL task handle
- Assuming priority range is only 0 or 1
- Confusing handle with pointer to handle
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