Question

I verified that the package is installed with perldoc -l Thread::Semaphore, but i still get this error:
Can't locate object method "down_force" via package "Thread::Semaphore" at <filename line#>

my code:

: #use perl
   eval 'exec perl -S $0 ${1+"$@"}'
   if 0;

use threads;
use threads::shared;
use Thread::Semaphore;

my $s = Thread::Semaphore->new();

$s->down_force();    #it complains about this one

#some code here...

Answer 1

You probably have version 2.09 of Thread::Semaphore, which doesn’t have the down_force() method. Try upgrading to the most recent version, which is currently 2.12.