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Has the thread cancellation problem evolved ?
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Date: | 2007-08-28 (15:12) |
From: | Brian Hurt <bhurt@j...> |
Subject: | Re: [Caml-list] Has the thread cancellation problem evolved ? |
Robert Fischer wrote: > Brian Hurt wrote: > >> So what happens if I throw an infinite loop into an exception handler? > > Now, my experience with .Net is somewhat dated, but I'm pretty sure it > re-hangs on your loop, and signaling another abort will break out of > your loop and continue up the chain of exception handlers. At least > once upon a time, there was a very large business which I worked for > that did a lot of concurrent .Net work, and the standard solution was > to keep signaling the abort until the thing finally died. > > ~~ Robert. > > Until you get someone "clever", who does something like (in Ocaml): let rec do_my_work () = try do_a_bunch_of_work () with | Thread_abort_exception -> (* Ack! Someone tried to kill me! I refuse to die! *) do_my_work () ;; I suppose eventually you'd blow stack. Then, there's the what-if: let rec example () = try do_a_bunch_of_work () with | Thread_abort_exception -> raise (Invalid_arg "Ack! They got me!") ;; i.e. what happens if my catch expression raises another (different) exception? Not to mention the fact that this solution requires a rather intrusive change to the run time, and a special exception which behaves differently from every other exception. Brian