[pcwalton]

You can use the `Rc` or `RcMut` types in the standard library. They're just smart pointers, like C++ `shared_ptr`.

[hershel]

Is it possible to use them in zero ? because ksr2's comments tells otherwise.

[pcwalton]

Nowadays you can just use libstd in no-runtime apps; you can choose whether to start the runtime and if you're running on bare metal, just don't start it.