Re: pthreads and Performer

New Message Reply Date view Thread view Subject view Author view

From: Simon C Mills (simon++at++wgs.estec.esa.nl)
Date: 10/09/2000 09:04:28

Hi,

I want to be able to use clip textures in an existing application that
uses pthreads. Now, I saw the below in the archives which explains why
I'm having problems but the referenced URL doesn't seem to exist any
more. Is this solution still available anywhere? I think it would solve
my problems.

On Tue, 27 Jun 2000 Ran Yakir wrote:
>
> Actually, I think Performer is forking and not sprocing. You will encounter
> problems only if you use a pfQueue, which uses sproc. Since pfQueue is used by
> cliptextures, then cliptextures and pthreads are your problem. I've safely used
> Performer with pthreads when cliptextures were not needed.
> However, if you do need to use cliptextures and pthreads, I've made a hack that
> enables it. You can download it from my web page
> http://rtset.co.il/rany/downloads.html
> This hack implements sprocsp (the function used by pfQueue) using pthreads, in
> a transparent manner.
>
> Good luck
> Ran
>
> ross::barna wrote:
>
> > rules of thumb for pthreads + performer that seem to work for me:
> >
> > 1) sproc before fork
> >
> > performer sproc's, pthreads fork. make sure to
> > spawn your performer proc's before your threads!
> >
> > 2) don't access performer data structure while pf is drawing
> >
> > use a read/write lock to make sure your threads don't
> > mess with pfObjects while pfSync(), pfFrame()
> > and pfDraw() are being called. the pthreads are readers
> > and the fn that calls pfSync, frame and draw is the
> > writer.
> >
> > -ross
> >
> > On Tue, 27 Jun 2000, Acosta, Mark W [Magic Earth LLC] wrote:
> >
> > > I recall that mixing pthreads and Performer was a bad thing. Is this still
> > > true?
> > >
> > > Mark Acosta
> > > Magic Earth LLC

Regards, Simon
_______________________________________________________________________

Simon Mills
Silicon Worlds S.A.
c/o Modelling & Simulation Section (TOS-EMM) Tel: +31 (0)71 565 3725
European Space Agency (ESA/ESTEC) Fax: +31 (0)71 565 5419
Postbus 299, 2200AG Noordwijk e-mail: simon++at++wgs.estec.esa.nl
The Netherlands http://www.estec.esa.nl/wmwww/EMM
_______________________________________________________________________

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Mon Oct 09 2000 - 09:01:34 PDT

This message has been cleansed for anti-spam protection. Replace '++at++' in any mail addresses with the '@' symbol.