Date: Thu, 20 Feb 2003 09:16:55 +0200
From: Zaretskii Eli <ezaretski AT elta DOT co DOT il>
Subject: RE: COM1: always non-blocking?
To: Keith Doyle <kdd21 AT hotmail DOT com>, djgpp AT delorie DOT com
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> From: Keith Doyle [mailto:kdd21 AT hotmail DOT com] 
> Sent: Wednesday, February 19, 2003 7:39 PM
> 
> A call to read() returns immediately whether or not there is a
> character, if there is none it returns 0, so I can just loop until
> read() > 0 and I can get the chars.

You could also use `select' for this.

> It would appear to be a polling
> loop that way however, and according to a previous poster, could
> "miss" characters if not called quickly enough

Yes, that's true.  However, with modern CPUs, perhaps such polling is
not a big problem.


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