C++ std::shared_ptr usage and information

std::tr1::shared_ptr is part of the TR1 additions to the C++ STL.
With GCC, it is available either through #include <tr1/memory> (GCC 4.1) or #include <memory> (GCC 4.3)

You were also asking for references or literature...

I found 3 articles that may help:

• An article on Smart Pointers, which is an overview good for a general understanding.
• An actual reference for std::shared_ptr.
• A great tutorial discussing every method of TR1 shared_ptr along with sample code.

Also a comment on your code example:

std::shared_ptr<A*> ptr_A = shared_ptr( new A() ); 

The template argument should be A instead of A* :

std::shared_ptr<A> ptr_A = shared_ptr( new A() ); 

If you don't have shared_ptr in std you can use it from boost.

#include <boost/shared_ptr.hpp>

boost::shared_ptr<A> ptr_A( new A() );