🚀 go-pugleaf

Hi.  Ive got an os2 program communicating via a named pipe with a 
DOS program written in Borland Pascal (I know, I cant help it) 
running in a VDM.

Heres the problem:

The Pascal function I am using in the DOS program to read data from the pipe 
is BlockRead.  This function returns either the number of bytes read
into a buffer, or 0 if there is no data available.  This works fine
in a normal DOS environment, reading from a normal file, but when
I tried it in the VDM talking to the pipe, instead of returning 0 when
there is no data to be read, it just hangs until there is data to be
read, just like a blocking function.  I cant have this - I need the
program doing other stuff while there is no data to be processed in the
pipe.

So:  Why is this happening, and how can I get around it?

Thanks everybody!

Steve Mathers
s.mathers@trl.oz.au