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Re: 5.8.2 coredump: tied hashes implemented as XSUB methods

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Tim Bunce
November 17, 2003 15:05
Re: 5.8.2 coredump: tied hashes implemented as XSUB methods
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On Mon, Nov 17, 2003 at 05:13:14PM +0000, Alan Burlison wrote:
> Yitzchak Scott-Thoennes wrote:
> >My memory is that they used the READONLY flag on the hashes to
> >indicate a restricted hash only after checking that it had no current
> >meaning.  If that memory is correct, setting it on the HVs in 5.6.1
> >was a noop.  Did you find that it had any effect?
> I think it had an effect if you applied it to the hash elements, but I 
> don't think it ever did anything to the hash itself.  From looking through 
> the Hash::Utils documentation, I think I probably *do* want to use 
> restricted hashes, as I'm representing a tree of read-only C structs as a 
> tree of hashes, which is why I was fiddling around with SvREADONLY_on in 
> the first place.  However, I'm not aware of any documentation on how this 
> should be done from XSUB code.  I can always look at how Hash::Utils does 
> it, but that's implemented (mainly) in perl rather than XSUB - I was hoping 
> for some existing XSUB code I could plagarise ;-)

And the rest of us are looking forward to plagarising yours ;-)


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