module EventMachine::Synchrony

Deferrable object, simply pass it to EM::Synchrony.sync
either succeeds or fails. You do not need to patch or modify the
yield and automatically resume your code (via Fibers) when the call
has a "callback" and an "errback", the sync methond will automatically
As long as the asynchronous function returns a Deferrable object, which

p result.response
result = EM::Synchrony.sync EventMachine::HttpRequest.new(URL).get

or callback-based methods under the hood. Example:
Synchrony.sync allows you to write sequential code while using asynchronous

sync is a close relative to inclineCallbacks from Twisted (Python)

def self.sync(df)
  f = Fiber.current
  df.callback { |r| f.resume(r) }
  df.errback { |r| f.resume(r) }
  Fiber.yield
end