Creating shared_ptr from raw pointer

Question

I have a pointer to an object. I would like to store it in two containers which both have the ownership. So I think I would be good to make it a shared_ptr of C++0x. How cou

Answer 1

You can use a variety of ways, but reset() would be good:

map1[ID].reset(obj);

And to address the issue of having two maps refer to the same shared_ptr, we can have:

map2[ID] = map1[ID];

Note that the trick in general to avoid a double delete is to try to avoid raw pointers at all. Hence avoid:

classA* obj = new classA();
map1[ID].reset(obj);

but instead put the new heap object straight into a shared_ptr.