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Date: Wed, 5 May 2004 20:30:16 -0400 (EDT)
From: Steve Thompson <smt AT vgersoft DOT com>
Reply-To: smt AT vgersoft DOT com
To: cygwin AT cygwin DOT com
Subject: Re: pthreads and sockets - Cannot register window class error
In-Reply-To: <Pine.CYG.4.58.0405051858560.3220@fordpc.vss.fsi.com>
Message-ID: <Pine.LNX.4.58.0405052025540.29120@honker.vgersoft.com>
References: <4098760F DOT CDB4F630 AT hot DOT pl> <4098E04B DOT 34D2866B AT dessent DOT net> <20040505210340 DOT GB321 AT coe DOT bosbc DOT com> <Pine DOT LNX DOT 4 DOT 58 DOT 0405051838240 DOT 6708 AT honker DOT vgersoft DOT com> <Pine DOT CYG DOT 4 DOT 58 DOT 0405051858560 DOT 3220 AT fordpc DOT vss DOT fsi DOT com>
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On Wed, 5 May 2004, Brian Ford wrote:

> On Wed, 5 May 2004, Steve Thompson wrote:
>
> > On Wed, 5 May 2004, Christopher Faylor wrote:
> >
> > > Unless HOST is a numeric IP address, gethostbyname should be properly
> > > reentrant.  The only time gethostbyname is not thread safe is when it is
> > > resolving a numeric IP.
> >
> > I believe that gethostbyname(), since it is returning a pointer to a
> > statically allocated structure, cannot be thread safe under any
> > circumstances. I always wrap it with a mutex until I'm done with the
> > hostent structure.
>
> That's a good portable practice.  But, if your going to essentially call
> cgf a lyer, please at least check the source.  He uses a thread specific
> buffer to return that data.  It's obvious if you look.

Heaven forbid that I should do that; it certainly wasn't my meaning.
Apologies to cgf if it was taken that way. In any event, relying on a
feature that is particular to one implementation will always bite you in
the end.

Steve

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