22 Oct
2012
22 Oct
'12
12:31 p.m.
Message: 13
Date: Sun, 21 Oct 2012 19:57:31 +0000
From: Fons Adriaensen <fons(a)linuxaudio.org>
To: David Robillard <d(a)drobilla.net>
Cc: linux-audio-dev(a)lists.linuxaudio.org
Subject: Re: [LAD] ANN: convoLV2 0.2
Message-ID: <20121021195731.GC6724(a)linuxaudio.org>
Content-Type: text/plain; charset=us-ascii
On Sun, Oct 21, 2012 at 03:49:30PM -0400, David Robillard wrote:
You can use semas on OSX, you'll need to use sem_open API instead of sem_init. Using
here: sem_open, sem_post/sem_wait, sem_unlink/sem_close with success (In Faust Work
Stealing Scheduler code). And semas are actually a slight wrapper over Mach semas. You can
check that in XNU source (here for instance
http://opensource.apple.com/release/mac-os-x-1068/)
Stéphane
The appropriate thing to use on OSX is mach
semaphores. This code is
terrible.
I'd be most happy to replace the current code with
some using Mach semas. Patches will be much appreciated.
> (A "blocking in a real-time thread is
acceptable" argument)
Yes, in some cases that is acceptable.
> (Hilarious appeal to irrelevant authority)
Much more relevant than you are.
Ciao,
--
FA
22 Oct
22 Oct
12:50 p.m.
New subject: ANN: convoLV2 0.2
On Mon, Oct 22, 2012 at 02:31:35PM +0200, Stéphane Letz wrote:
You can use semas on OSX, you'll need to use
sem_open API instead of sem_init.
Using here: sem_open, sem_post/sem_wait, sem_unlink/sem_close with success
(In Faust Work Stealing Scheduler code). And semas are actually a slight
wrapper over Mach semas. You can check that in XNU source (here for
instance http://opensource.apple.com/release/mac-os-x-1068/)
Except that the implementation is incomplete. And worse, some functions
such as sem_init() do exist but don't work. Earlier versions of zita-
convolver also required sem_getvalue() which doesn't exist or doesn't
work, I don't remember.
Having to do all of: destroy a sema, create a new one in the filesystem
(which requires unique names), open then unlink the new one, just to
reset its counter to zero is too much a hack for it to be acceptable.
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)
1:03 p.m.
New subject: ANN: convoLV2 0.2
Le 22 oct. 2012 à 14:50, Fons Adriaensen a écrit :
On Mon, Oct 22, 2012 at 02:31:35PM +0200, Stéphane
Letz wrote:
I know that, so use sem_open.
You can use semas on OSX, you'll need to use
sem_open API instead of sem_init.
Using here: sem_open, sem_post/sem_wait, sem_unlink/sem_close with success
(In Faust Work Stealing Scheduler code). And semas are actually a slight
wrapper over Mach semas. You can check that in XNU source (here for
instance http://opensource.apple.com/release/mac-os-x-1068/)
Except that the implementation is incomplete. And worse, some functions
such as sem_init() do exist but don't work. Earlier versions of zita-
convolver also required sem_getvalue() which doesn't exist or doesn't
work, I don't remember.
Having to do all of: destroy a sema, create a new one in the filesystem
(which requires unique names), open then unlink the new one, just to
reset its counter to zero is too much a hack for it to be acceptable.
Ciao,
Well... your choice.
Stéphane
1:09 p.m.
New subject: ANN: convoLV2 0.2
On Mon, Oct 22, 2012 at 9:03 AM, Stéphane Letz <letz(a)grame.fr> wrote:
Le 22 oct. 2012 à 14:50, Fons Adriaensen a écrit :
http://subversion.ardour.org/svn/ardour2/branches/3.0/libs/pbd/pbd/semaphor…
(work by david robillard)
On Mon, Oct 22, 2012 at 02:31:35PM +0200,
Stéphane Letz wrote:
> You can use semas on OSX, you'll need to use sem_open API instead of
sem_init.
> Using here: sem_open, sem_post/sem_wait,
sem_unlink/sem_close with
success
(In Faust
Work Stealing Scheduler code). And semas are actually a slight
wrapper over Mach semas. You can check that in XNU source (here for
instance http://opensource.apple.com/release/mac-os-x-1068/)
Except that the implementation is incomplete. And worse, some functions
such as sem_init() do exist but don't work.
1:38 p.m.
New subject: ANN: convoLV2 0.2
Le 22 oct. 2012 à 15:09, Paul Davis a écrit :
On Mon, Oct 22, 2012 at 9:03 AM, Stéphane Letz <letz(a)grame.fr> wrote:
Le 22 oct. 2012 à 14:50, Fons Adriaensen a écrit :
Even better....
Stéphane
On Mon, Oct 22, 2012 at 02:31:35PM +0200,
Stéphane Letz wrote:
http://subversion.ardour.org/svn/ardour2/branches/3.0/libs/pbd/pbd/semaphor…
(work by david robillard)
You can use semas on OSX, you'll need to use
sem_open API instead of sem_init.
Using here: sem_open, sem_post/sem_wait, sem_unlink/sem_close with success
(In Faust Work Stealing Scheduler code). And semas are actually a slight
wrapper over Mach semas. You can check that in XNU source (here for
instance http://opensource.apple.com/release/mac-os-x-1068/)
Except that the implementation is incomplete. And worse, some functions
such as sem_init() do exist but don't work.
1:56 p.m.
New subject: ANN: convoLV2 0.2
On Mon, Oct 22, 2012 at 09:09:56AM -0400, Paul Davis wrote:
http://subversion.ardour.org/svn/ardour2/branches/3.0/libs/pbd/pbd/semaphor…
(work by david robillard)
I know about this, and it will find its way into zita-convolver some day.
That does however require a major version increment, so it'll have to
wait a bit.
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)
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Stéphane Letz