Re: [boost] Re: first sight

From: David Abrahams (david.abrahams_at_[hidden])
Date: 2002-01-17 08:00:33

----- Original Message -----
From: "terekhov" <terekhov_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Thursday, January 17, 2002 5:10 AM
Subject: [boost] Re: first sight

> --- In boost_at_y..., Tom Becker <voidampersand_at_f...> wrote:
> > >4) Allow the user to "eat" the exception.
> > >5) Make the cancellation "flag" a sticky flag, so if the
>
> I would much appreciate if someone would explain me
> the usefulness of N4 and N5 (other than ability
> to play tennis, I mean N4 handler and cancel.point/
> thread::exit(...)).

If a thread has a considerable amount to do in order to shut down cleanly,
this allows it to yield control of the processor several times in a
controlled manner before finally exiting.

> Why not just say that it is *undefined* behavior?

Because we can do better and saying "undefined behavior" doesn't buy any
useful implementor flexibility in this case.

-Dave