linux-kernel - Re: [take24 0/6] kevent: Generic event handling mechanism.

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Date:	Tue, 21 Nov 2006 21:46:05 +0300
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Ulrich Drepper <drepper@...hat.com>
Cc:	David Miller <davem@...emloft.net>, Andrew Morton <akpm@...l.org>,
	netdev <netdev@...r.kernel.org>,
	Zach Brown <zach.brown@...cle.com>,
	Christoph Hellwig <hch@...radead.org>,
	Chase Venters <chase.venters@...entec.com>,
	Johann Borck <johann.borck@...sedata.com>,
	linux-kernel@...r.kernel.org, Jeff Garzik <jeff@...zik.org>,
	Alexander Viro <aviro@...hat.com>
Subject: Re: [take24 0/6] kevent: Generic event handling mechanism.

On Tue, Nov 21, 2006 at 08:43:34PM +0300, Evgeniy Polyakov (johnpol@....mipt.ru) wrote:
> > I've explained this multiple times.  The struct sigevent structure needs 
> > to be extended to get a new part in the union.  Something like
> > 
> >   struct {
> >     int kevent_fd;
> >     void *data;
> >   } _sigev_kevent;
> > 
> > Then define SIGEV_KEVENT as a value distinct from the other SIGEV_ 
> > values.  In the code which handles setup of timers (the timer_create 
> > syscall), recognize SIGEV_KEVENT and handle it appropriately.  I.e., 
> > call into the code to register the event source, just like you'd do with 
> > the current interface.  Then add the code to post an event to the event 
> > queue where currently signals would be sent et voilà.
> 
> Ok, I see.
> It is doable and simple.
> I will try to implement it tomorrow.

I've checked the code.
Since it will be a union, it is impossible to use _sigev_thread and it
becomes just SIGEV_SIGNAL case with different delivery mechanism.
Is it what you want?

-- 
	Evgeniy Polyakov
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