Re: ADTPro Issue Transferring IIgs-->WinXP

["Michael J. Mahon" <mjmahon@aol.com>]

schmidtd wrote:
> On Mar 5, 7:17 pm, "Polymorph" <polymorp...@hotmail.com> wrote:
>
> > David,
> >
> > I sent you an email to your my-deja email address, but haven't heard
> > back from you yet. I'll copy the email that I sent you here:
>
> Sorry, that address has been gone since Google bought Dejanews.  You
> can get a hold of me from the adtpro.sourceforge.net project page -
> Sourceforge will handle the email translation.
>
>
> > I have found the area of code that is causing my transfers to fail -
> > it is in SerialTransport.java in the readByte() method. It seems that
> > you set the ports timeout dependent upon the argument given, however,
> > is this necessary for every byte?
>
> There are situations that need a timeout, and situations that don't.
> As I hacked the timeout code into the base, not thinking it through
> particularly carefully, that was the solution I came up with in the
> shortest amount of time.  It would make more sense to have different
> read methods that either did or did not care about timeouts.

A very low-overhead way to handle non-critical timing timeouts is to
use a suitably low-frequency periodic interrupt routine to poll the
in-process task(s) to see if there has been any progress since the last,
or last N, polls.  This allows escaping a stuck task without the severe
overhead of setting and resetting timeouts on every task, particularly
high-frequency ones.

-michael

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