David Teller wrote:
>  I would have figured that the best way to properly kill a thread would
> be to have some form of channel (i.e. Events.t)-based communication
> between threads -- and then killing the channel.
> 
>  Trouble is that, as I've just realized, there is no such facility as
> killing/sending an exception through a channel. Does anyone know why ?

Event.channel is a type constructor which takes an argument identifying 
the type of objects that are sent over the channel. You can send thunk 
computations ((unit -> 'a) Event.channel), which may very well raise an 
exception. Or you can simply send an exception (exn Event.channel). 
Finally, you can send "()" on a channel (unit Event.channel), whose sole 
  purpose is to communicate soft-kill requests.

Alex