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Date: Mon, 01 Oct 2012 18:05:19 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai] Qeustion about rtdm_event_timedwait
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To: Andrey Nechypurenko <andreynech@googlemail.com>
Cc: xenomai@xenomai.org

On 10/01/2012 06:01 PM, Andrey Nechypurenko wrote:
>> On 10/01/2012 05:51 PM, Andrey Nechypurenko wrote:
>>> driver's read() function is registered as *read_nrt*
>>
>> That is the problem.
> 
> Thank you Gilles!
> 

If you want to wake up a regular thread, you should signal an
rtdm_nrtsig in the interrupt handler, and the nrtsig handler wakes up
the linux thread using regular linux services such as wake_up(). But in
that case, of course, do not expect low latencies for this thread.

Also note that rtdm_event_wait works like a semaphore, not like a
condition variable: it has a counter, rtdm_event_wait will return
immediately as many times as rtdm_event_signal was called.

-- 
					    Gilles.