#!/usr/bin/perl

use strict;
use warnings;

use MCE::Step;

sub task_a {
   for (1 .. 1e5) {
      MCE->await('B', 200) if $_ % 200 == 0;
      MCE->enq('B', 1e3 + int(rand 1000));

      MCE->await('C', 200) if $_ % 200 == 0;
      MCE->enq('C', 2e3 + int(rand 1000));
   }
}

sub task_b {
    my ($mce, $arg1, $arg2, $argN) = @_;
    MCE->enq('C', $arg1 * 10);
}

sub task_c {
    my ($mce, $arg1, $arg2, $argN) = @_;
    print "$arg1\n";
}

MCE::Step->init(
   task_name   => [ 'A', 'B', 'C' ],
   max_workers => [  1,   2,   3  ],
);

mce_step \&task_a, \&task_b, \&task_c;

print "Done\n";