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Date: Sat, 04 Oct 2003 06:03:55 +0200
From: Hans-Georg Thien <1682-600@onlinehome.de>
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To: linux-kernel@vger.kernel.org
Subject: Re: getting timestamp of last interrupt?
References: <fa.fj0euih.s2sbop@ifi.uio.no> <fa.fvjdidn.13ni70f@ifi.uio.no>
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Richard B. Johnson wrote:
> On Thu, 2 Oct 2003, Hans-Georg Thien wrote:
> 
> 
>>I am looking for a possibility to read out the last timestamp when an
>>interrupt has occured.
>>
>>e.g.: the user presses a key on the keyboard. Where can I read out the
>>timestamp of this event?
> 
> 
> You can get A SIGIO signal for every keyboard, (or other input) event.
> What you do with it is entirely up to you. Linux/Unix doesn't have
> "callbacks", instead it has signals. It also has select() and poll(),
> all useful for handling such events. If you want a time-stamp, you
> call gettimeofday() in your signal handler.
> 
Thanks a lot Richard,

... but ... can I use signals in kernel mode?