gistfile1.rb

      def write(string)
        if @__write_buffer.nil?
          @__write_buffer = string
        else
          @__write_buffer << string
        end

        total_written = 0

        while @__write_buffer.length != 0
          begin
            written = write_nonblock(@__write_buffer)
          rescue ::IO::WaitWritable
            wait_writable
            retry
          rescue EOFError
            return total_written
          end

          total_written += written
          if written < @__write_buffer.length
            # Avoid mutating string itself, but we can mutate the remaining data
            if @__write_buffer.equal?(string)
              # Copy the remaining data so as to avoid mutating string
              # Note if we have a large amount of data remaining this could be slow
              @__write_buffer = string[written..-1]
            else
              @__write_buffer.slice!(0, written)
            end
          end
        end

        total_written
      end