#!/usr/bin/ruby
#
# Allow the user to query the status of several running totals via multiple
# background threads

code = lambda do
    Thread.current[:x] = 0
    loop do
        Thread.current[:x] += 1
        Thread.pass
    end
end

a, b, c = (1..3).map{Thread.new(&code)}

loop do
    begin
        print "a, b, c = #{[a, b, c].map{|x| x[:x]}.join(", ")}\r"
        Thread.pass
    rescue Interrupt
        puts
        exit
    end
end