On 05/07/13 10:00, Corinna Vinschen wrote:
On Jul 4 19:34, David Stacey wrote:
>Please find attached a short programme that demonstrates a problem
>I'm having with recv() timeouts. Under Fedora 19 x64, the test
>programme times out after three seconds (which is the desired
>behaviour). However, when run from Cygwin, the call to recv() never
>exits.
>
>I am using the latest snapshot (2013-07-03) in 32-bit Cygwin. OS is
>Windows 7 Ultimate x64 SP1.
>
>Many thanks in advance for your help,
Unfortunately that won't work at the moment.
The underlying implementation of recv is nonblocking. A blocking
Windows recv call is noninterruptible, unfortunately (at least up to
Windows 2003), so this was necessary to handle signals or
thread-cancellation.
Due to its nonblocking nature under the hood, this doesn't support
SO_RCVTIMEO and SO_SNDTIMEO and, surprisingly, we never had a complaint
about that, despite its age.
I can't promise a quick solution, but I put implementing handling of
SO_RCVTIMEO and SO_SNDTIMEO in recv/send on my TODO list. Of course,
patches are welcome, too.
For the time being, I suggest to use select or poll with timeout
instead.
Thank you for your e-mail, and for replying so quickly. Regarding the
recv() timeouts: no problem, it's easy enough to work around. On your
TODO list, file this one under things to do when you've finally got that
cat.
I think that's the last of my Poco problems out of the way. I'll give it
a clean build and test, and send an ITP either this evening or tomorrow.
Thanks once again for your help,
Dave.
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