Common Operations
Reset: std::unique_ptr::reset() and std::shared_ptr::reset
unique_ptr::reset()is basically basicallydelete ptr; ptr = nullptrstd::shared_ptr::reset()can be a bit slower, because of deallocation & allocation of referecen count.
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std::unique_ptr<int> ptr;
ptr.reset(new int(1));
std::shared_ptr<int> s_ptr;
s_ptr = std::make_shared<int>(3);
s_ptr.reset(new int(3));
Ownership:
unique_ptris move-assigned.
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// ownership
// unique_ptr is move-assigned
std::unique_ptr<int> new_ptr = std::make_unique<int>(5);
// If the count reaches 0, it also deletes the object and the control block
std::shared_ptr<int> s_ptr2 = std::make_shared<int>(6);
s_ptr = s_ptr2; // now the element 3 is deleted since it's not referenced
