# File lib/poll.rb, line 328
        def events( eventMask=nil )
                if eventMask
                        eventMask = eventMask.to_i
                        @events.find_all {|io,evmask| (evmask & eventMask).nonzero? }.collect {|io,evmask| io}
                else
                        @events.keys
                end
        end