[boost] threads: how to remotely kill a thread?

Subject: [boost] threads: how to remotely kill a thread?
From: David M. Cotter (me_at_[hidden])
Date: 2009-10-02 03:07:50

say i'm on the main thread, and i've got a thread::id of some other  
preemptive thread.  i do not have the actual boost::thread object any  
more.

and i want to unceremoniously kill that thread.  like right now.

how do i kill it?  i don't see a way to recover the actual  
boost::thread from the thread::id.  but even if i could, and then call  
thread.interrupt(), that's more of a polite request which is free to  
be ignored, rather than a you_must_die_now() thing.