Re: [boost] [smart_ptr] Some questions

From: Frank Mori Hess (frank.hess_at_[hidden])
Date: 2008-04-09 17:06:04

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Wednesday 09 April 2008 15:47 pm, Daniel Frey wrote:
> What do you (and others) think about branching enable_shared_from_this<T>
> into two classes:
>
>   low_overhead_enable_shared_from_this<T>
>
> and
>
>   feature_rich_enable_shared_from_this<T>

What I would like better is something like a simple base class that shared_ptr 
recognizes, which only has a single virtual member function like 

virtual void accept_owner(shared_ptr<T> &owner);

which shared_ptr would call when it takes ownership of an object derived from 
the aforementioned base class.  Then you could use it to implement your 
stripped down version of enable_shared_from_this, or whatever else you might 
think of.  Of course, you would still be inflicted with a vtable, but that 
doesn't add any per-object space overhead, which seems to be what you're most 
concerned about.

- -- 
Frank
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)

iD8DBQFH/S+/5vihyNWuA4URAl7OAKCRK7OTsHU2H4a0GKuLeMKyyvcDxgCffB7+
OqJHVtck2ucIbrqotEU7yd0=
=+6v3
-----END PGP SIGNATURE-----