[Xenomai-help] RTDM and possible bug

[Xenomai-help] RTDM and possible bug

[Rodrigo Rosenfeld Rosas]

Hi Jan,

I'm getting the following message from kernel:
Xenomai: RTDM: no non-RT close handler
Error registering RTDM device

But I am using only a RT open handler and a RT close handler. The 
documentation states:
"rtdm_close_handler_t 	close_nrt	
 	Close handler for non-real-time contexts, optional if close_rt is non-NULL."
which is my case.

Am I missing something?

I'll take a closer look at RTDM source-code, but maybe you can enlight me 
until there.

Thanks,

Rodrigo.

	

	
		
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Re: [Xenomai-help] RTDM and possible bug

[Jan Kiszka]

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Rodrigo Rosenfeld Rosas wrote:
> Hi Jan,
> 
> I'm getting the following message from kernel:
> Xenomai: RTDM: no non-RT close handler
> Error registering RTDM device
> 
> But I am using only a RT open handler and a RT close handler. The 
> documentation states:
> "rtdm_close_handler_t 	close_nrt	
>  	Close handler for non-real-time contexts, optional if close_rt is non-NULL."
> which is my case.
> 
> Am I missing something?

Nope, it's bug in the documentation. Do you actually depend on RT
context for cleanup?

I recently decided to enforce a non-RT closure handler on registration.
This is required to be able to do the

    echo file_descriptor > /proc/xenomai/rtdm/open_fildes

dance on forgotten file descriptors and to implement on day an automatic
closure on process termination.

The doc is now fixed, thanks for reporting.

> 
> I'll take a closer look at RTDM source-code, but maybe you can enlight me 
> until there.
> 
> Thanks,
> 
> Rodrigo.
> 
> 

Jan


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Re: [Xenomai-help] RTDM and possible bug

[Rodrigo Rosenfeld Rosas]

>Rodrigo Rosenfeld Rosas wrote:
>> Hi Jan,
>>
>> I'm getting the following message from kernel:
>> Xenomai: RTDM: no non-RT close handler
>> Error registering RTDM device
>>
>> But I am using only a RT open handler and a RT close handler. The
>> documentation states:
>> "rtdm_close_handler_t 	close_nrt
>>  	Close handler for non-real-time contexts, optional if close_rt is
>> non-NULL." which is my case.
>>
>> Am I missing something?
>
>Nope, it's bug in the documentation. Do you actually depend on RT
>context for cleanup?
For now, I can't think a reason I would need RT context for cleaning up. 
Actually, I do nothing for now on cleanup.

>I recently decided to enforce a non-RT closure handler on registration.
>This is required to be able to do the
>
>    echo file_descriptor > /proc/xenomai/rtdm/open_fildes
>
>dance on forgotten file descriptors and to implement on day an automatic
>closure on process termination.
>
>The doc is now fixed, thanks for reporting.

Ok, I'll add a non-RT close handler to my driver.

Thanks,

Rodrigo.

	

	
		
_______________________________________________________ 
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