class EventMachine::Synchrony::TCPSocket

def read_data
  data = try_read_data
  unless data == :block
    @read_bytes = 0
    # read(n,buffer) returns the buffer when it does not return nil or raise an exception
    data = @read_dest.replace(data) if @read_dest and not data.nil?
    @read_dest = nil
  end
  data
end