Re: [Boost-users] shared_ptr and global reset

Subject: Re: [Boost-users] shared_ptr and global reset
From: Jeff Flinn (TriumphSprint2000_at_[hidden])
Date: 2009-02-26 07:06:52

Igor R wrote:
>     Let's say that I have many shared_ptr<A> sharing ownership to the
>     same A object. At some point, I would like all those shared_ptr to
>     point to a  new  Object A. Is there an easy (and safe) way to
>     accomplish that?
>     I know how to do that for one shared_ptr using either "reset",
>     either operator =  but in order to do this for all shared_ptr
>     sharing ownership, the only way I could think of is through a
>     registration mechanism (like the Observer pattern) but this sounds
>     an overkilling process to me.
> 
>  
> You can wrap ObjectA by a proxy object, so that all the shared_ptr's 
> point to that proxy that holds actual object. Then you can "reset" the 
> object in the proxy.

Wouldn't shared_ptr itself serve as the proxy:

        shared_ptr< shared_ptr<A> > aPtrPtr;

Jeff