is this correct usage for a smart_ptr

[clankill3r]

I was wondering if the following code is correct.

  void ofxDGlobalTangibleList::addTangible(ofxDTangibleBase *t) {
    
    shared_ptr<ofxDTangibleBase> sp(t);
    addTangible(sp);
    
}

I have another method called addTangible that accepts shared_ptr<ofxDTangibleBase>.
I wonder in the method above, does a copy of ofxDTangibleBase gets created or not?
And does the shared_ptr still exists when the method goes out of scope.
I know shared_ptr are a bit different, like your not suppose to reference them for example.