Method decrement

uspace/lib/cpp/src/refcount_obj.cpp:43–58

    }

    bool refcount_obj::decrement()
    {
        if (__atomic_sub_fetch(&refcount_, 1, __ATOMIC_ACQ_REL) == 0)
        {
            /**
             * First call to destroy() will delete the held object,
             * so it doesn't matter what the weak_refcount_ is,
             * but we added one and we need to remove it now.
             */
            decrement_weak();

            return true;
        }
        else
            return false;
    }

    bool refcount_obj::decrement_weak()
    {