Method AtReturn

srtcore/api.cpp:1190–1194

        int         eid;
        CUDTUnited* that;
        AtReturn(CUDTUnited* t, int e)
            : eid(e)
            , that(t)
        {
        }
        ~AtReturn() { that->m_EPoll.release(eid); }
    } l_ar(this, eid);