class MonoLogger::LocklessLogDevice

def initialize(log = nil)
  @dev = @filename = @shift_age = @shift_size = nil
  if log.respond_to?(:write) and log.respond_to?(:close)
    @dev = log
  else
    @dev = open_logfile(log)
    @dev.sync = true
    @filename = log
  end
end