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Re: Turn $$ into a magical readonly variable that always fetchesgetpid()

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From:
Simon Wistow
Date:
January 3, 2011 13:32
Subject:
Re: Turn $$ into a magical readonly variable that always fetchesgetpid()
Message ID:
20110103213222.GC91026@thegestalt.org
On Wed, Dec 29, 2010 at 04:35:24PM +0100, Max Maischein said:
> This is a bug opportunity, because if XS calls fork(3) or an embedding 
> application calls fork(3), Perls notion of $$ and the value of getpid() can 
> go out of sync, unless the C code takes special care to update $$.

For what it's worth Whatif.pm (which fakes reversible computing using 
fork() and more than a touch of crack) explicitly modifies $$ as part of 
its smoke and mirrors and, IIRC, it stole the code to do that from 
PPerl.

http://cpansearch.perl.org/src/SIMONW/Whatif-1.3/Whatif.xs
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