#!/usr/bin/perl

use strict;
use warnings;

use threads;
use threads::shared;
use Thread::Queue;
my $q = Thread::Queue->new;

my $done : shared;
$done = 0;

my $wget_thread = threads->create( \&wget_sub );

my $cpu_monitor_thread = threads->create( \&monitor_cpu );
my $mem_monitor_thread = threads->create( \&monitor_mem );

$q->enqueue(1);
$wget_thread->join();
$q->dequeue;

my $cpu = $cpu_monitor_thread->join();
my $mem = $mem_monitor_thread->join();

print "cpu usage: $cpu\n";
print "mem usage: $mem\n";

sub wget_sub {
    my $wget = `wget http://10.3.13.4/testfile.dat`;
    $done = 1;
    lock($done);

    print "wget:\n$wget\n";

    return 1;

}

sub monitor_cpu {

    my $cap;
    while ( my $val = $q->peek(0) ) { #this does not get evaluated to true, ever
       $cap .= `bash cpu.sh; sleep 2`;
    }
    return $cap;
}

sub monitor_mem {

    my $cap;
    while ( my $val = $q->peek(0) ) {
       $cap .= `perl mem.pl; sleep 2`;
    }
    return $cap;
}