Re: [Boost-users] [Asio] Need help making a custom service

Subject: Re: [Boost-users] [Asio] Need help making a custom service
From: Eric Prud'hommeaux (eric_at_[hidden])
Date: 2015-03-11 07:25:37

* svante karlsson <saka_at_[hidden]> [2015-03-10 20:35+0100]
> If you got it working by wrapping the file descriptor - post it and I'll
> give it a shot on tidying it up.

I *think* I have a vested interest in this as well. An age or two ago,
I started an inotify interface on a query engine (when some data file
changes on disk, it re-reads). I didn't know what I was doing and
ended up with something that tightloops.
  https://github.com/ericprud/SWObjects/blob/sparql11/lib/SimpleServer.hpp#L1157

Since inotify works on fds, what you're doing might teach me my next
steps. (I'd of course love to see inotify/fsevent/FileSystemWatcher
widgets in Asio and am happy to donate whatever I have of value).

> 2015-03-10 20:05 GMT+01:00 Kyle Edwards <kedwards_at_[hidden]>:
> 
> > On Tue, 2015-03-10 at 14:53 +0100, Bjorn Reese wrote:
> > > On 03/09/2015 09:34 PM, Kyle Edwards wrote:
> > >
> > > > Notice the use of reactor::read_op. I've done a little more digging
> > > > through the Boost.Asio code, and it looks like, for this application, I
> > > > need to use reactor::except_op instead. Is there a simple
> > class/function
> > > > that does this? Or will I have to implement it myself?
> > >
> > > A possibility could be to wrap the file descriptor in a udp::socket
> > > (or possibly your own derived from basic_datagram_socket) and use
> > > async_receive(null_buffers) with the message_out_of_band flag set.
> > > Never tried it myself though.
> >
> > Alright, I've written a custom service that just wraps the relevant UDP
> > classes (service, implementation) and does async_receive() with
> > message_out_of_band. It's hairy, but it seems to work. Thank you!
> > _______________________________________________
> > Boost-users mailing list
> > Boost-users_at_[hidden]
> > http://lists.boost.org/mailman/listinfo.cgi/boost-users
> >

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