Re: [boost] [smart_ptr] new shared_from_this behavior with multiple owners

From: Felipe Magno de Almeida (felipe.m.almeida_at_[hidden])
Date: 2008-03-25 19:58:39

On Tue, Mar 25, 2008 at 8:55 PM, Frank Mori Hess <fmhess_at_[hidden]> wrote:
>
>  I just want to point out that even with the fix that went in today, the
>  behavior of enable_shared_from_this::shared_from_this when multiple
>  shared_ptrs take independent ownership is inconsistent with the old
>  behavior.  The old behavior was that shared_from_this would return a
>  shared_ptr that shared ownership with whichever shared_ptr took ownership
>  of the object last.  The new behavior is shared_from_this always returns a
>  shared_ptr that shares ownership with the first shared_ptr to take
>  ownership of the object.  The attached example illustrates the difference
>  when compiled against the old lib and svn trunk.
>
>  I don't want to make a big deal of this, as I actually think the new
>  behavior is more sane, but I thought I should point it out.  My preferred
>  solution would be to just point out the change in the next release notes
>  or something like that.

What happens if two different deleters are used to create different
shared_ptrs (on the same object) ?
Does this happens with only shared_from_this inherited classes or for all types?

>  --
>  Frank

-- 
Felipe Magno de Almeida