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From: kgdykes@watmath.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: can polled/timed-out reads be done in microsoft C ??
Message-ID: <5164@watmath.UUCP>
Date: Tue, 17-Feb-87 04:05:06 EST
Article-I.D.: watmath.5164
Posted: Tue Feb 17 04:05:06 1987
Date-Received: Tue, 17-Feb-87 19:18:33 EST
Distribution: na
Organization: U of Waterloo, Ontario
Lines: 17

I need to be able to "poll" COM1 from a C program.
Since regular read() or getc() wait forever for data, is there
a method to either or all of
 1) set a signal or alarm which can "time-out" the normal i/o routines
 2) already exists a read or getc type routine which either times-out
     or immediately returns some status if no data is available.
 3) invoke (or write if i have to) a routine to tell me
     "are there any data to be read on this file handle" then i can go
      do the getc()
Thankyou!
   -Ken Dykes
    Software Development Group
    U.of.Waterloo, Ontario, Canada
    kgdykes@watmath

:q