[Fwd: Re: pthreads and Performer]

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Phil Keslin (philk++at++cthulhu.engr.sgi.com)
Fri, 29 Oct 1999 10:54:44 -0700

Anthony Bavuso wrote:
>
> Phil Keslin wrote:
>
> There are instances where Performer will use sproc, most notable being
> pfQueue.
> Objects of this type are used primarily for ASD (I believe) and clipmap
> paging.
>
> I understand that if I use pfQueues and pthreads I will have problems. But
> the question is can I get away without using pfQueues. I am new to
> performer so I don't really know what a pfQueue is for. I read the man page
> and understand that it is pretty much a general purpose queue.

It is used internally for asynchronous paging operations. If you don't use ASD
or clipmapping, then you might be safe. :)

> Right now I am designing a prototype system that uses Performer, and I need
> to make a decision whether I should use pthreads? So my question is will
> the use of pthreads limit my ability to use performer by limiting me to not
> using pfQueues? Are pfQueues essential to Performer? What impacts will I
> feel by not being able to use them? How important is ASD (I don't know what
> that means) and clipmap paging?

ASD stands for Active Surface Definition. ASD is primarily used for dynamic
terrain by Performer applications. For both ASD and clipmapping, you must
explicitly create the appropriate nodes to access the feature (i.e., if you
don't know about them you aren't using them).

- Phil

-- 
Phil Keslin <philk++at++engr.sgi.com>

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