Hi, On Friday, August 02, 2013 19:39:33 Ulrich Hertlein wrote: > std::make_shared allocates object and ref-counter in one allocation :-) Hmm, this requires either a lefthand reference constructor to be called additionally to the original one that you just need. If you have everything inline that's relatively fine, especially if you have more or less simple classes, the compiler can relatively well optimize this away. If you either have implemented these in the implementation file you already rely on link time optimiziation to find this. Very often not switched on, and if so usually not that agressive to really find these opportunities. Or of you do not have the lefthand reference constructor implemented, you end up doing a copy constructor which is actually way worse than what we are talking about.
> C++11 also has std::enable_shared_from_this which solves some issues, but > still hasn't the same semantics as osg::ref_ptr. Also this one, just says that you can get a shared pointer from a plain one. As far as I can see this says nothing about the storage layout or the amount of allocations it uses. And actually there are implementations implementing this just by storing a weak_ptr to this in the base class and on calling shared_from_this you get the shared pointer from the weak pointer inside. Greetings Mathias _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
