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Date:      Mon, 12 Aug 2002 15:34:05 +0300
From:      Maxim Sobolev <sobomax@FreeBSD.org>
To:        Daniel Eischen <eischen@pcnet1.pcnet.com>
Cc:        hackers@FreeBSD.ORG, audit@FreeBSD.ORG, Alexander Litvin <archer@whichever.org>, Andriy Gapon <agapon@excite.com>
Subject:   Re: Thread-safe resolver [patches for review]
Message-ID:  <3D57AB3D.17737AD7@FreeBSD.org>
References:  <Pine.GSO.4.10.10208120819110.20559-100000@pcnet1.pcnet.com>

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Daniel Eischen wrote:
> 
> On Mon, 12 Aug 2002, Maxim Sobolev wrote:
> > Folks,
> >
> > Attched please find two patches based on bin/29581 PR to make FreeBSD
> > resolver thread-safe. They represent two approaches to reach this goal
> > - the first is to introduce reentrant versions of the standard
> > gethostbyXXX(3) APIs, similar to ones existing in other unices, and
> > the second one is to make gethostbyXXX(3) returning data placed into
> > per-thread storage when linked with libc_r. I like the latter approach
> > more, since it doesn't introduce new non-standard APIs.
> >
> > I would like to hear any comments and suggestions on the proposed
> > patches, as well as to opinions about which path to chose.
> 
> Why do you need uthread_resolv.c?  You should be able to thread
> calls by checking __isthreaded.  Just keep everything in libc.
> If there are missing stubs for some pthread_* routines (I think
> everything you need is in -current's libc), then add them.

Why do we have uthread_error.c then? Also it will add penalty to every
access to _res_data structure even in non-threaded case. 

-Maxim

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