[boost] Re: operator new (size_t, ...)

From: David B. Held (dheld_at_[hidden])
Date: 2003-01-14 22:31:18

"Philippe A. Bouchard" <philippeb_at_[hidden]> wrote in message
news:b02f0c$o1d$1_at_main.gmane.org...
>
>     It seems placement operator new (size_t, ...) would extend a lot
> garbage collection possibilities.  Why don't we define a set of rules for
> each tag this overloaded placed operator would use:

More logically, why don't you implement these yourself, and use
your implementation to justify the interface you design?

> shared_ptr<int>(new int());
>
> GC type defined at run-time:
> shared_ptr<int>(new (gc) int());  // Add pointer to a list
> shared_ptr<int>(new (rc) int());  // Add counter + pointer to a list
> shared_ptr<int>(new (os) int());  // Add owner to a list
>
> GC type defined at compile-time:
> placed_ptr<int>(new (po) int());  // Reserve an extra integer to the
> allocated block
>
>     shared_ptr<> would be more portable while placed_ptr<> would
> require a placed object with operator new (size_t, po).

Probably, "gc_ptr<>" might be a better name.

Dave