-=> Quoting James R. Cook to All <=-

 JRC> Isn't DosRead supposed to block if no bytes are available to be read?
 JRC> I'm playing with serial I/O threads and if DosRead doesn't ever block
 JRC> on a read from the comm port, there's no reason for the overhead of a
 JRC> thread, mutex semaphore and all that other garbage.  Thanks!

Yes, DosRead will block, but you have to tell the com port which mode to
use.

from bsedev.h...

/* fbTimeout */
#define MODE_NO_WRITE_TIMEOUT              0x01
#define MODE_READ_TIMEOUT                  0x02
#define MODE_WAIT_READ_TIMEOUT             0x04
#define MODE_NOWAIT_READ_TIMEOUT           0x06

Check out pmtermsr.{lzh|zip} by Peter Fitzsimmons.  It is a good example
of this, as well as fast scrolling in a PM window.

You can find it by doing a search from http://filez.com

And its probably freq'able from Peter's BBS, too.

Phil Crown
pcrown{at}airmail.net
http://web2.airmail.net/pcrown/

--- Blue Wave/OS2 v2.30