Method AddRefManually

src/butil/shared_object.h:44–45

Add ref and returns the ref_count seen before added. The effect is basically same as butil::intrusive_ptr (obj).detach() except that the latter one does not return the seen ref_count which is useful in some scenarios.

    // except that the latter one does not return the seen ref_count which is
    // useful in some scenarios.
    int AddRefManually()
    { return _nref.fetch_add(1, butil::memory_order_relaxed); }

    // Remove one ref, if the ref_count hit zero, delete this object.
    // Same as butil::intrusive_ptr<T>(obj, false).reset(NULL)