From: Logan Capaldo <logancapaldo@...>
Date: 2006-08-09T01:27:26+09:00
Subject: Re: Signaling Ruby from C/C++


On Aug 8, 2006, at 8:28 AM, Francis Cianfrocca wrote:

>
> What's ugly about this of course is that you can only run this process
> once at a time because of the hardcoded port. I *know* for sure that I
> have solved this problem in the past with Windows pipes, because an
> early version of EventMachine used exactly that technique. I'll  
> have to
> dig through the source-code archives and find it.
>
> -- 
> Posted via http://www.ruby-forum.com/.
>

It ain't perfect, but:

require 'timeout'
require 'socket'
port = 2200
server =  nil
Timeout::timeout(2.0) do
   begin
     begin
       server = TCPServer.new( port )
     rescue Errno::EADDRINUSE
       port += 1
       retry
     end
   rescue Timeout::Error
     puts "Gave up trying to get a port"
     exit 1
   end
end

client = TCPClient.new( 'localhost', port )