OpenEuphoria

Re: Someone changed my Thread Manager writeup?

• Posted by Al Getz <Xaxo at aol.com> Aug 12, 2005
• 563 views

Hi again Pete,

Ok, that was the short reply :)
I guess it just pisses me off when some people give something about
three seconds of thought before they start rattling off bad points
about something.  It's ok though i guess, as a critical look is
worthwhile.

Rob said he was working on threads so he's not going to stop now :)

I said it used preemptive MT because once the time slice is up
another thread can break in.  preemptive MT doesnt imply an order.
If you dont like that, then call it pseudo preemptive MT'ing :)

>I guess i could add a scheduling mechanism if that would make more
> >people happy :)
> I'd be very surprised if you could.
What would be so surprising about that???

I kept saying in past posts that the operation is from a software
point of view it works like threads...from a hardware standpoint
(like I/O) the user still has to break up his task into pieces.

I also said the order or completion doesnt always matter:

OrderA:
  Thread 1, Part A
  Thread 2, Part A
  Thread 1, Part B
  Thread 2, Part A

OrderB:
  Thread 1, Part A
  Thread 2, Part A
  Thread 2, Part B
  Thread 1, Part A

Both take the same about of time (approx), and both complete
both tasks.  Many times the user doesnt care what order they
are done in.

As i had mentioned, i can change this so that we would get OrderA
all the time, but it makes the code more complicated.  Dont be
surprized because as you know this is all mostly software and you
can do almost anything with software :)
Also, as i mentioned time and time again in past posts, there are
going to be a ton of times when the user wont know the difference
anyway (OrderA or OrderB ?).

There's lots of things this doesnt do that 'real' threads can do,
such as wait for another thread to complete before continuing, but
that would add more code too.  This addresses the most basic problems
that come up from not having any threads at all (at least until Rob
completes his task of adding some sort of threads to Eu).

Im using this now all the time, and i certainly wouldnt use it
if it didnt work, or didnt provide a decent amount of functionality
over not having it.


Take care,
Al

And, good luck with your Euphoria programming!

My bumper sticker: "I brake for LED's"