Re: Class with task destructor

["Randy Brukardt" <randy@rrsoftware.com>]

"Robert A Duff" <bobduff@shell01.TheWorld.com> wrote in message 
news:wcc39d5in9z.fsf@shell01.TheWorld.com...
> Adam Beneschan <adam@irvine.com> writes:
...
>> Is it just me, or are there others who think that resorting to code
>> like this is ... well, icky?
>
> It's not just you.  ;-)
>
> Ada should provide a way to wait for an arbitrary task, or a group of 
> tasks,
> to terminate.  Without polling.  It's quite tricky to implement, though.

Of course, when we tried to do that for subpools, AdaCore complained loudly, 
and we ended up taking that feature out of the subpool proposal.

The problem is that waiting on multiple events is not something that is 
easily done, and it is especially hard to insert into existing task 
supervisors (designed without needing to do that).

I thought (and still think) that some sort of sub-master would do the trick 
without too much disruption, but the feedback we got on that idea was not 
too positive.

Anyway, it would make sense to have a much more general feature rather than 
worrying about this problem only in the context of Unchecked_Deallocation 
and Unchecked_Deallocate_Subpool. But that will be even a harder sell, I 
fear.

                          Randy.