Hi,

I'm trying to split a large chunk of code that uses shared variables and I can't get past the error "lock can only be used on shared values". Here's the reduced version of that code, in two files:

***mybase.pm: 
package mybase;
use threads;
use threads::shared;

my $mode : shared;
1;

[download]
***derived.pm: 
#!/usr/bin/perl
package derived;
use strict;
use Exporter;
use threads;
use threads::shared;
use mybase;
use vars qw(@ISA);
@ISA = ('mybase');

sub foo {
lock($mybase::mode);
$mybase::mode = 1;
}

foo();
1;

[download]
*** 
[root@nf-power2 perltest]# ./derived.pm
lock can only be used on shared values at ./derived.pm line 12.

[download]

Any ideas on why a variable declared as shared is not appearing as a one?

Thanks,
b

In reply to can't lock an object from a base class in a derived class by Anonymous Monk

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