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Postings from January 2001
On Fri, Jan 26, 2001 at 11:33:56PM +0000, Alan Burlison wrote:
> Nicholas Clark wrote:
>
> > Hmm. Maybe I'm missing something here. (I don't know much about threads)
> > perl rapidly copies the data returned by gethostbyname into SVs
> > If threaded perl had a gethostbyname mutex so that only one thread at
> > a time could get into the area referencing the call to gethostbyname()
> > and the returned (possibly static) structure, would this solve the
> > problem (at least within perl, provided extengethostbynamesions don't call gethostbyname)
>
> Rapidly? What happens if gethostbyname needs a NIS lookup? Or an LDAP
I said rapidly copies. That was all :-)
I was aware that DNS lookup can be several seconds (or tens of)
> lookup? Or a DNS lookup? What happens if I call a third party library
> that does name lookup as well?
Stuffed at that point.
> Simple answer - No.
On the basis that it only cures some of the symptoms (perl would no longer
clash with perl using gethostbyname) but not the disease
("perl5's threading is irrevocably broken" I think that the term was
Are you going to put that in an X mail header?)
Nicholas Clark
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