Having passed through the Novice gates of threads, PerlTk, and shared hashes, I find myself in the past in failure.

Having completed my threaded Perl, I now attempted to move it to the destination system. That is, from Knoppix (Perl 5.8.8) to RHEL4 WS (Perl 5.8.5). BOOM! 

...
use threads ();
use threads::shared ();
use Thread::Semaphore;
...
my $line_semi :shared = new Thread::Semaphore(0); #works in 5.8.8
...
...
 sub sendout_sub ($ $)
{
    ...
       {
            $line_semi->down(1);    # line 309
            lock @xlines;
            $line = shift @xlines;
        }  #implicit unlock;
....

[download]

The error in 5.8.5 is:

"Thread failed to start: Can't call method "down" on unblessed reference at line 309."

Did ::Semaphore do the creation of the returned reference incorrectly?

Can I do my own blessing into Semaphore?

Upgrading Thread::Semaphore looks like a complete upgrading to 5.8.8. That would be a politically hard task to get done.

In reply to I lost my "bless"ing. by Wiggins

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