There's no way I know of that will support dynamic-wind. In the case of with-handlers, the problem is that with-handlers compiles to a use of with-continuation-mark that the transformation supports, but uses a mark key that is not serializable. In principle, dynamic-wind could have been implemented like that, but it actually embedded in the whole continuation-handling infrastructure of the virtual machine. Making *that* serializable is a much bigger deal and the only other way would be to implement your own dynamic-wind/callcc in the web-server language... which would not be fun.
Jay ____________________ Racket Users list: http://lists.racket-lang.org/users
