For folks using Perl not built to support threads and wanting to try BrowserUk's example, here is the same thing using MCE::Hobo and MCE::Shared.
#! perl -slw
use strict;
use MCE::Hobo;
use MCE::Shared;
sub nap { select '','','', $_[0] }
tie my $done, 'MCE::Shared', 0;
my $hobo = mce_async( sub {
$|++;
until( $done ) {
nap( 0.1 ), printf "\r%s\t\t", '.' x $_ for 1 .. 10, reverse
+1 .. 10;
nap( 0.01 ), printf "\r%s\t\t", '.' x $_ for 1 .. 10, reverse
+1 .. 10;
nap( 0.8 );
}
}, $done );
sleep 10;
$done = 1;
$hobo->join;
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