[Vala] Porting libpurple library to Vala.

[Krzysztof Klinikowski <kkszysiu gmail com>]

Hello.
I'm currently working at porting libgadu library written mostly in
pure C to Vala. I made some work now and I stuck on that:

        int (*resolver_start)(int *fd, void **private_data, const char
*hostname);
        void (*resolver_cleanup)(void **private_data, int force);

It's part of libgadu.h:
http://toxygen.net/websvn/filedetails.php?repname=libgadu&path=%2Ftrunk%2Finclude%2Flibgadu.h.in
and I dont really know how to made something like that in vapi file.
Could anyone help me?