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Re: straight-C DNS lookup with timeout?
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Re: straight-C DNS lookup with timeout?


  • Subject: Re: straight-C DNS lookup with timeout?
  • From: Chris Ridd <email@hidden>
  • Date: Thu, 02 Jan 2003 15:03:04 +0000

On 2/1/03 2:25 pm, Philip George <email@hidden> wrote:
> Okay, I think the answer to my dns timeout problem is to go back to the
> pthread killer solution. I got the timeout to work nicely using
> pthread_cancel() and contrary to popular speculation, it doesn't
> unleash any havoc on my memory footprint.
>
> Here's the hitch though... gethostbyaddr() isn't threadsafe and it
> really shows. I get all kinds of whacky garbledygook from it when
> executed in separate pthreads. The answer is gethostbyaddr_r(), but no
> such animal yet exists in OS X. So, I'll need to implement my own
> gethostbyaddr_r(). Has anyone done this already or seen it somewhere
> online?

BIND 9 (www.isc.org) contains this function in the lwres (lightweight
resolver?) lib.

FreeBSD might also have something that could be easily ported, but I didn't
look very hard :-(

Cheers,

Chris
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