[ldns-users] function call backs in ldns_resolver_send*?

W.C.A. Wijngaards wouter at NLnetLabs.nl
Wed Dec 15 13:02:48 CET 2010


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Hoi Miek,

On 12/15/2010 12:53 PM, Miek Gieben wrote:
> [ Quoting Wouter Wijngaards in "Re: [ldns-users] function call back"... ]
> True, but with callbacks you can fire off multiple requests and then
> wait for a reply from one of them.
> Currently this is hard to do because ldns_resolver_send* hides all this.
> 
> I'm not proposing to make ldns into a threaded library, we have
> libunbound for that, I'm asking for a way to seperate the send and
> receive in ldns.
> 
>> It is not viable (for ldns itself).  libunbound gives you a callback
>> that gives the packet wiredata from unbound, it handles the threads,
> 
> Do callbacks imply threads? (I thought not, but I may be wrong).

Well asynchronous implies threads.  You want something that resolves an
array of 5 queries at the same time, and it finishes when they are all done?

That is still a fair amount of work.

Best regards,
   Wouter
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