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Re: Serial blocking read
I think this is coming from fhandler_serial.cc but I don't know for
sure. Can you provide a unified diff? A complete unified diff will
show the filename and give a little more context.
The contributing link on http://cygwin.com should give you some pointers on how
to do this and how to provide a patch.
cgf
On Fri, Dec 15, 2000 at 05:38:09PM -0800, Dan Morris wrote:
>Has anyone else had problems with serial port reads blocking even when
>O_NONBLOCK is passed to _read in the 1.1.6-1 DLL?
>
>I noticed that my reads were appropriately non-blocking most of the time, but
>blocked whenever "overlapped_armed" was set, because in this case raw_read
>never finds out how many bytes are in the serial port's buffer. This patch
>seems to fix the problem for me :
>
>121a122,128
>> if (overlapped_armed) {
>> if (!ClearCommError (get_handle (), &ev, &st))
>> goto err;
>> else if (st.cbInQue)
>> inq = st.cbInQue;
>> }
>>
>
>If anyone else has found a better solution to this problem, let me know...
>otherwise perhaps this patch will fix things.
>
>-Dan
>
>Dan Morris
>http://techhouse.brown.edu/dmorris
>
>Tiqit Computers
>http://www.tiqit.com
>
--
cgf@cygnus.com Red Hat, Inc.
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