module EventMachine

def self.synchrony(blk=nil, tail=nil, &block)

paused and resumed based on IO scheduling.
a Ruby Fiber such that async operations can be transparently
A convenience method for wrapping EM.run body within 
def self.synchrony(blk=nil, tail=nil, &block)
  blk ||= block
  context = Proc.new { Fiber.new { blk.call }.resume }
  self.run(context, tail)
end