Re: how to interrupt waiting for a semaphore after a timeout

["Tomaz Beltram" <tomazb@hotmail.com>]

So, what do I have to call from my timer function in order that the waiting 
process becomes signaled? I have tried wake_up_process() but it didn't work.
Tomaz


>From: Jan Hudec <bulb@ucw.cz>
>To: Tomaz Beltram <tomazb@hotmail.com>
>CC: ruxyz@yahoo.com, kernelnewbies@nl.linux.org
>Subject: Re: how to interrupt waiting for a semaphore after a timeout
>Date: Thu, 2 Oct 2003 10:12:08 +0200
>
>On Mon, Sep 29, 2003 at 12:02:40 +0000, Tomaz Beltram wrote:
> > I was looking for a more lightweight solution. I need timed semaphore 
>down
> > from within a kernel module. The idea was to substitute down() with
> > down_interruptible() and check for the return value. I would then 
>wake_up
> > the waiting process from another thread after some time. Dynamic timers
> > seem just perfect for this job. Obviously, I am not doing it the right 
>way,
> > as the process remains locked.
>
>down_interruptible means it's interruptible with SIGNAL, so it returns
>only if signal_pending().
>
>-------------------------------------------------------------------------------
>						 Jan 'Bulb' Hudec <bulb@ucw.cz>

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