about kde4's smart pointer

Frank Osterfeld frank.osterfeld at gmx.de
Tue Oct 3 21:16:28 BST 2006

On Tuesday 03 October 2006 17:10, Thiago Macieira wrote:
> Cyrille Berger wrote:
> >On Tuesday 03 October 2006 16:08, Thiago Macieira wrote:
> >> Doesn't QSharedData/QSharedDataPointer do what you want? They have
> >> copy-on-write semantics, though.
> >
> >yes and that's the problem :) They are designed to reduce the number of
> > copy, not to replace pointers and be used as smart pointers.
> There's QPointer, but your object has to be a QObject.

QPointer only guards the pointer (i.e. resets it to 0 if deleted), but it 
doesn't do refcounting and auto-deletion. In my own code, I use Frerich's 
KSharedPtr replacement he proposed here a year ago [1]. One of it's 
advantages is that it's not necessary for the the shared type to inherit 
KShared, so one can use the type as normal non-pointer object (IIRC 
operator=() etc. is private for KShared).

[1] http://lists.kde.org/?l=kde-core-devel&m=112631226219177&w=2


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