# File lib/cgikit.rb, line 527
                def save( session )
                        unless FileTest.directory? @tmpdir
                                require 'ftools'
                                File.makedirs @tmpdir
                        end

                        CKFileLock.exclusive_lock( _tmpfile(session.session_id) ) do | file |
                                Marshal.dump( session, file )
                        end
                end