I have been looking into your thread lib, and all seem fine and nice, but is it true that there where no RW mutex or is it just called something I did not know ?
IIUC, the read-write mutex in the current thread lib is broken. The reason it hasn't been fixed is probably because the thread developers have been working on a rewrite of the code base. When that's done, I believe there will be a read-write mutex (here's an old but relevant post:
http://permalink.gmane.org/gmane.comp.lib.boost.threads.devel/58)
Also, ... are there some kind of URL / socket lib in boost ?
Check out Boost.Asio. That's what you're looking for. (It won't be in boost 1.34, but it has been accepted)
http://asio.sf.net