[m-users.] Two more predicates for dealing wih threads

[Volker Wysk]

Hi!

I'm playing with threads, and in order to better see what's going on,
I'd like to have two more predicates:

- One for thread.channel, which returns the current length of the channel.
- One for thread.semaphore, which returns the current value of the 
  semaphore.

It would be nice, if those could be added.  :)


Cheers,
Volker