From: Paul Davis <paul@linuxaudiosystems.com>
To: Jaroslav Kysela <perex@suse.cz>
Cc: James Courtier-Dutton <James@superbug.demon.co.uk>,
Florian Bomers <Florian.Bomers@sun.com>,
"alsa-devel@lists.sourceforge.net"
<alsa-devel@lists.sourceforge.net>
Subject: Re: smix plugin available?
Date: Wed, 27 Nov 2002 08:45:52 -0500 [thread overview]
Message-ID: <E18H2SF-0005Yo-00@sc8-sf-list1.sourceforge.net> (raw)
In-Reply-To: Your message of "Wed, 27 Nov 2002 10:29:28 +0100." <Pine.LNX.4.33.0211270949140.532-100000@pnote.perex-int.cz>
>Sorry, it's not as easy as you've described. It's not possible to invoke
>any user code from the kernel code directly. There is a scheduler which is
>informed that a task has been woken up. It depends on scheduler when the
>task is really invoked. It's quite same as for the r/w model where the
>application is notified over poll that something occured.
i think we can consider the behaviour of the kernel scheduler when it
schedules a SCHED_FIFO task after an audio interface interrupt has
woken it to be very, very close to the kind of callback system james
is describing. ditto for any kind of wakeup of a SCHED_FIFO task
(e.g. when its woken by a write to pipe, or a signal).
its not perfect, as i am very disappointed to discover, but its also
very close.
--p
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next prev parent reply other threads:[~2002-11-27 13:45 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-26 1:16 smix plugin available? Mark Swanson
2002-11-26 3:19 ` Paul Davis
2002-11-26 3:54 ` Mark Swanson
2002-11-26 4:13 ` Paul Davis
2002-11-26 8:13 ` Frans Ketelaars
2002-11-26 12:33 ` Mark Swanson
2002-11-26 19:32 ` Florian Bomers
2002-11-26 23:11 ` Paul Davis
2002-11-27 0:54 ` Florian Bomers
2002-11-27 1:06 ` James Courtier-Dutton
2002-11-27 9:29 ` Jaroslav Kysela
2002-11-27 11:36 ` tomasz motylewski
2002-11-27 13:21 ` James Courtier-Dutton
2002-11-27 13:53 ` Paul Davis
2002-11-27 14:24 ` Jaroslav Kysela
2002-11-27 13:07 ` Avoiding xruns... was " James Courtier-Dutton
2002-11-27 13:55 ` Paul Davis
2002-11-27 13:42 ` Paul Davis
2002-11-27 15:21 ` Kai Vehmanen
2002-11-27 16:26 ` Jaroslav Kysela
2002-11-27 13:45 ` Paul Davis [this message]
2002-11-27 14:39 ` Jaroslav Kysela
[not found] <20021127135012.7B5A559D353@kerberos.suse.cz>
2002-11-27 14:43 ` Jaroslav Kysela
2002-11-27 15:04 ` Paul Davis
[not found] <200211271350.OAA22613@mail.bodensee.com>
2002-11-27 15:47 ` tomasz motylewski
2002-11-28 13:50 ` Paul Davis
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