From: Tom Tromey <tromey@redhat.com>
To: emacs-devel@gnu.org
Subject: Re: Async DNS lookups
Date: Mon, 01 Nov 2010 10:09:16 -0600 [thread overview]
Message-ID: <m3aaltauvn.fsf@fleche.redhat.com> (raw)
In-Reply-To: <m3bp6bj3kt.fsf@quimbies.gnus.org> (Lars Magne Ingebrigtsen's message of "Sat, 30 Oct 2010 13:57:22 +0200")
>>>>> "Lars" == Lars Magne Ingebrigtsen <larsi@gnus.org> writes:
Lars> I don't really see any easy fixes for this with Emacs' feature set at
Lars> the moment. A process filter will block Emacs' "main thread", and it
Lars> needs to resolve the addresses, so...
Lars> 1) implement a C-level resolving functionality that has a callback that
Lars> will be called upon resolving the address. This seems hard.
There is a GNU library for this:
http://directory.fsf.org/project/c-ares/
Apparently glibc already includes getaddrinfo_a for this. It seems to
be undocumented, but this has some info & pointers:
http://bitsup.blogspot.com/2008/09/asynchronous-dns-lookups-on-linux-with.html
A couple other approaches come to mind as well.
You could run the synchronous resolver in a new thread, and have the
main thread run the event loop.
You could use a small helper program instead of calling the resolver
in-process. That is basically the same as the previous idea,
substituting a process for a thread.
Tom
next prev parent reply other threads:[~2010-11-01 16:09 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-30 11:57 Async DNS lookups Lars Magne Ingebrigtsen
2010-10-30 13:11 ` Julien Danjou
2010-10-30 13:34 ` Ted Zlatanov
2010-10-30 15:40 ` Helmut Eller
2010-10-31 4:01 ` Stefan Monnier
2010-10-31 17:16 ` Lars Magne Ingebrigtsen
2010-11-01 16:09 ` Tom Tromey [this message]
2010-11-02 16:15 ` Ken Raeburn
2010-11-02 16:29 ` Lars Magne Ingebrigtsen
2010-11-02 17:28 ` Stefan Monnier
2010-11-02 18:13 ` Lars Magne Ingebrigtsen
2010-11-02 18:30 ` Tom Tromey
2010-11-02 18:28 ` Lars Magne Ingebrigtsen
2010-11-02 18:47 ` Tom Tromey
2010-11-02 21:28 ` Stefan Monnier
2010-11-03 19:46 ` Lars Magne Ingebrigtsen
2010-11-03 21:29 ` Davis Herring
2010-11-03 21:46 ` Lars Magne Ingebrigtsen
2010-11-04 2:24 ` Stefan Monnier
2010-11-04 8:27 ` Andreas Schwab
2010-11-04 14:15 ` Stefan Monnier
2010-11-04 16:09 ` Ken Raeburn
2010-11-04 19:49 ` Lars Magne Ingebrigtsen
2010-11-04 20:40 ` Davis Herring
2010-11-04 21:32 ` Stefan Monnier
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