You need to wrap the while loop in a for loop that iterates once for each client you start:

use strict;
use threads;
use threads::shared; ### I omitted this from my example above initiall
+y.
use Thread::Queue;
use ClarRPC;

my $queue = new Thread::Queue;

rpc('10.15.51.208', '1300', 'ping -n 50 10.15.51.208');
rpc('10.15.51.208', '1301', 'ping -n 10 10.15.51.208');
rpc('10.15.51.208', '1302', 'ping -n 50 10.15.51.208');

for( 1 .. 3 ) { ## Must iterate once for each thread started ###
    while (my $ref = $queue->dequeue) {
        my ($port, @results) = @$ref;
        print "$port : @results\n";
    }
}

sub rpc
{
    my ($ip, $port, $command) = @_;
    async{
        my $connection = ClarRPC->connect($ip, $port);
        my @resp :shared = $connection->rpc(
              'ClarRPCService::system_call', $command
        );
        $connection->disconnect();
        unshift(@resp, $port);
        $queue->enqueue(\@resp, undef);
    }->detach
}
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Yes, sorry for overlooking that. I have a few general questions more about understanding and extending this concept.

This is a rather simple proof of concept, the final implementation would involve the rpc function being called from multiple different places, possibly simultaneously, in this case I want the caller to wait until its response is ready, when it is it should grab it and go on, while the other callers continue to wait.

In Pseudo code it would be some thing like this:

function rpc
    do thread and queueing stuff in here
end rpc


function blah
  rpc(IP, port2, command)
  look at queue see if your result is there
  if it is not
     wait
  else
     do other stuff with the info
end blah

function blee
  rpc(IP, port1, command)
  look at queue see if your result is there
  if it is not
     wait
  else
     do other stuff with the info
end blah
[download]

These function may very well call rpc at the same time, they will always use different port numbers. How would I go about using the queue to determine if my information is back, since in each instance of the call I won't know how many ports I have open, it only knows about the port it was told to use. Should I dequeue check the port/result and if it doesn't match enqueue it again?

I really appreciate all your help.

it only knows about the port it was told to use. Should I dequeue check the port/result and if it doesn't match enqueue it again?

No. What you are describing probably requires a completely different architecture to your OP code. But you first need to ask yourself a few questions.

The first problem is how are you ever going to get to call blee() once you've called blah()?

Ie. In the code that calls blah() and blee(), as you've described it in this post, once you call the first of these, it is going to block until it gets it's results, so you won't be able to call the second until the first has finished.

So how can "These function may very well call rpc at the same time," be so?

Once you decide how the top level of your code is going to operate, then you can decide how best to structure it?

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