On Jul 5 13:41, David Stacey wrote: > 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.
LOL. Nah, it's an interesting little problem, I'm pretty sure I'll have a look later this month. > 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, No worries. And thanks for the testcase, I'm sure I'll use it to test the SO_RCVTIMEO implementation when I get to it. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
