[c++-pthreads] pthread_cancel and EH: let's try this again

[Peter Dimov]

Ted Baker wrote:

> I don't think you can deliver a safe solution, with acceptable
> overhead and comprehensible to ordinary programmers.  So, wouldn't
> it be more responsible to declare this combination as unsafe,
> and let this discussion die?

That's even more surreal.

C, a language that has no exceptions and no concept of exception safety, 
enables programmers to use thread cancellation via a mechanism that is 
(admittedly) lifted from C++...

... but C++, a language with exceptions and almost a decade of experience in 
exception safety declares cancellation unsafe and actively prohibits its 
use?

Responsible?