[Xenomai] FreeRTOS skin #2

Matthias Schneider ma30002000 at yahoo.de
Mon Jun 2 20:46:20 CEST 2014

----- Original Message -----

> From: Matthias Schneider <ma30002000 at yahoo.de>
> To: "xenomai at xenomai.org" <xenomai at xenomai.org>
> Cc: 
> Sent: Thursday, May 22, 2014 9:46 PM
> Subject: [Xenomai] FreeRTOS skin #2
> Hi all,
> after having rework extensively the FreeRTOS skin patch I feel ready 
> for the second round of review comments. I hope no one will mind me 
> starting a new thread for discussing it. I have tried to address all 
> of the mentioned issues so far, plus many more.
> Among them:
> * reworked alignment macros
> * #define portLONG long
> * remapped error codes
> * reworked scheduler start and stop completely as suggested
> * reworked Scheduler.queued_task, .state and .num_tasks
> * added new (internal) scheduler state taskSCHEDULER_SUSPENDING
> * many other improvements and simplifications
> * only take tasklist_lock for short time
> Like suggested, I have gone for the simpler implementation of the task 
> scheduler functionality and I added warnings and checks in case unsupported
> use cases are triggered (e.g. holding the scheduler lock on mp systems, etc.)
> This still needs to be reflected in the docu.
> I have not yet addressed the issues of 
> * vPortEnterCritical()/vPortExitCritical()
>   since they are used extensively in the demo code (which is completely 
>   hardware independent), but this can still be easily adapted.
> * starting thread priority inheritance (need to start a new 
>   discussion thread)
> * there is still a workaround for the cobalt priorities in the patch...
> Regards,
> Matthias
> p.s. Thank you a lot for your responsiveness addressing issues reported 
> by me, including all the refactoring that is making my life easier!

Please find enclosed a new version of the FreeRTOS skin. It adapts to the 
latest changes in forge/next and also removes the previously included 
workarounds - thanks to the changes done based on the first review round
they were no longer necessary.

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