Hello Peter!


 PF> This may actually be counter productive;  by servicing the device
 PF> driver too often,  you will call DosRead() more often (then if your
 PF> thread was running at a lower priority).  The DosRead() calls will
 PF> transfer fewer bytes with each call (perhaps as low as 1 to 10
 PF> bytes).  Since the overhead of calling DosRead() is _huge_,  you want
 PF> to call it as few times as possible,  and get as many bytes back with
 PF> each call (this is why "Wait for something" read timeout processing
 PF> is so cool).

The Timeout=0 seems to be dangerous in OS/2, because when the Application
want's to terminate it can lock the serial Port (or a Socket, the same
applies). So I prefer polling the character count in the buffer that I'am
able to react on a terminate flag. Or is it possible to close the serial
device (or Socket) with an external Program (I wasn't successful when it
tried this) ?

  Bye/2, Johannes!


Internet eMail Adresse: jstratmann{at}cww.de

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