I guess it wasn't clear in my initial example code that I'm creating a new closure for each attribute not just aliasing the same sub.

$subclass->new_meth will set $AUTOLOAD to "SUBCLASS::new_meth" so will install the closure there. If later I call $other_subclass->new_meth then I'll get another sub in OTHERSUBCLASS::new_meth. 

package A;
sub AUTOLOAD {
    my ($fn) = $AUTOLOAD =~ /^.*::(.+)$/;
    return if $fn eq 'DESTROY';
    *{$AUTOLOAD} = sub { print "$AUTOLOAD $fn"; };
    goto &$AUTOLOAD;  
}

package B;
@ISA = "A";

package C;
@ISA = "A";

package main;

$a = bless {}, 'A';
$b = bless {}, 'B';
$c = bless {}, 'C';

$a->shared; # call via baseclass first
$b->shared;
$c->shared;
 
$b->not_shared; # call via one subclas
$c->not_shared; # then another
$a->not_shared; # then base class

print "\nshared CODE refs:";
print $a->can('shared'); 
print $b->can('shared');
print $c->can('shared');

print "\nnot_shared CODE refs:";
print $a->can('not_shared');
print $b->can('not_shared');
print $c->can('not_shared');

[download]

Produces output: 

 perl -wl eg
A::shared shared
A::shared shared
A::shared shared
B::not_shared not_shared
C::not_shared not_shared
A::not_shared not_shared

shared CODE refs:
CODE(0x8105cb8)
CODE(0x8105cb8)
CODE(0x8105cb8)

not_shared CODE refs:
CODE(0x8105eb0)
CODE(0x8105db4)
CODE(0x8105e50)

So in the second case (which correspond to my usage) you get same closure created and installed in 3 places.

In reply to Re: Re: AUTOLOAD & mod_perl memory by bsb
in thread AUTOLOAD & mod_perl memory by bsb

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