Fiber Ruby

output

$ ruby poc_fiber.rb
 "hello"
 "world"

poc_fiber.rb

require 'thread'

q = Queue.new
thr = Thread.new do

  f1 = Fiber.new do
    Fiber.yield "hello"
  end

  f2 = Fiber.new do
    Fiber.yield "world"
  end

  q.push(f1)
  q.push(f2)
  q.push(q)

  while (f = q.pop) != q
    p f.resume
  end
end

thr.join