[Xenomai-help] rt_alarm_create

[Xenomai-help] rt_alarm_create

[Wayne Call]

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There are two rt_alarm_create functions.  One is for the kernel space and
the other is for user space.  

 

I have a linux driver that has an interrupt service routine.  When the
driver is loaded using insmod, it executes the rt_alarm_create.  When the
interrupt is triggered, the interrupt service routine executes the
rt_alarm_start function.  When the rt_alarm_start function expires, it
executes the alarm handler code.  All this code is executed in kernel space.


 

What I would like to do is create a user application that executes the alarm
handler code rather than the linux driver in kernel space.  If the
rt_alarm_create is executed in kernel space, is there a way to pass the
alarm descriptor to user space?

 

Wayne

 


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Re: [Xenomai-help] rt_alarm_create

[Philippe Gerum]

On Fri, 2009-04-24 at 15:37 -0600, Wayne Call wrote:
> There are two rt_alarm_create functions.  One is for the kernel space
> and the other is for user space.  
> 
>  
> 
> I have a linux driver that has an interrupt service routine.  When the
> driver is loaded using insmod, it executes the rt_alarm_create.  When
> the interrupt is triggered, the interrupt service routine executes the
> rt_alarm_start function.  When the rt_alarm_start function expires, it
> executes the alarm handler code.  All this code is executed in kernel
> space. 
> 
>  
> 
> What I would like to do is create a user application that executes the
> alarm handler code rather than the linux driver in kernel space.  If
> the rt_alarm_create is executed in kernel space, is there a way to
> pass the alarm descriptor to user space?

You should use rt_alarm_create() from user-space. There is no binding
possible between alarms created in kernel space to userland.

> 
>  
> 
> Wayne
> 
>  
> 
> 
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> Xenomai-help@domain.hid
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-- 
Philippe.