Method assign

src/common/classes/RefCounted.h:225–244

	protected:
		T* assign(T* const p)
		{
			if (ptr != p)
			{
				if (p)
				{
					p->addRef();
				}

				T* tmp = ptr;
				ptr = p;

				if (tmp)
				{
					tmp->release();
				}
			}

			return p;
		}

	private:
		T* ptr;