Re: suspicious pointer/integer coersion

This seems to have gone AWOL in the email ether, so I am resending.

-------- Original Message --------

Tom Lane wrote:

>Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
>
>
>>I have just noticed this code in plperl.c:
>>
>>
>> hv_store(plperl_proc_hash, internal_proname, proname_len,
>> newSViv((IV) prodesc), 0);
>>
>>
>>basically, here prodesc is a pointer to a struct, and we are storing it
>>as an integer in a perl hash for easy lookup by stringified oid.
>>
>>How safe is this conversion on 64 bit platforms?
>>
>>
>
>Not at all. I'd vote for converting the whole thing to a dynahash
>hashtable ...
>
>
>

Further investigation yields this from the perlguts man page:

What is an "IV"?

Perl uses a special typedef IV which is a simple signed integer type
that is guaranteed to be large enough to hold a pointer (as well as
an integer).

So it looks like my original concern was unfounded. Sorry for the noise.
We now return you to your previous program ...

cheers

andrew