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Calling vTaskStartScheduler and vTaskEndScheduler

Posted by csanikita92 on June 13, 2018

Hi,

Is it possible to have something like:

int main() { vTaskStartScheduler(); . . // some task calls vTaskEndScheduler();

             .
  vTaskStartScheduler();
                  ..
                  ..
  // some task calls  vTaskEndScheduler();

}

in an application?

That is, after an application calls vTaskStartScheduler and then a task calls vTaskEndScheduler, can the application call vTaskStartScheduler again?

We are performing a static data race detection and data flow analysis on FreeRTOSv10.0.0 which assumes that such a situation will never arise. Is our assumption correct or not?

Thanks, Nikita


Calling vTaskStartScheduler and vTaskEndScheduler

Posted by rtel on June 13, 2018

Very few ports implement vTaskEndScheduler(), perhaps only the Windows and DOS ports. I think in the Windows case ending the scheduler terminates the process, so code after vTaskStartScheduler() will never run. I can't recall what happens in the DOS case as the port is about 15 years old but I think FreeRTOS replaces DOS in memory and then uses a setjmp/lngjmp pair to exit the scheduler - not sure where it goes from there though.


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