C++ (Cpp) PDQ_DO_TYPE2_PRODUCERの例

コード例 #1

ファイル: pdq_ifsubr.c プロジェクト: repos-holder/openbsd-patches

ifnet_ret_t
pdq_ifstart(
    struct ifnet *ifp)
{
    pdq_softc_t *sc = (pdq_softc_t *) ((caddr_t) ifp - offsetof(pdq_softc_t, sc_arpcom.ac_if));
    struct mbuf *m;
    int tx = 0;

    if ((ifp->if_flags & IFF_RUNNING) == 0)
        return;

    if (sc->sc_if.if_timer == 0)
        sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;

    if ((sc->sc_pdq->pdq_flags & PDQ_TXOK) == 0) {
        sc->sc_if.if_flags |= IFF_OACTIVE;
        return;
    }
    for (;; tx = 1) {
        IFQ_POLL(&ifp->if_snd, m);
        if (m == NULL)
            break;

        if (pdq_queue_transmit_data(sc->sc_pdq, m) == PDQ_FALSE) {
            ifp->if_flags |= IFF_OACTIVE;
            break;
        }

        IFQ_DEQUEUE(&ifp->if_snd, m);
    }
    if (tx)
        PDQ_DO_TYPE2_PRODUCER(sc->sc_pdq);
}

コード例 #2

ファイル: pdq_ifsubr.c プロジェクト: coyizumi/cs111

static void
pdq_ifstart_locked(struct ifnet *ifp)
{
    pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
    struct mbuf *m;
    int tx = 0;

    PDQ_LOCK_ASSERT(sc);
    if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
	return;

    if (sc->timer == 0)
	sc->timer = PDQ_OS_TX_TIMEOUT;

    if ((sc->sc_pdq->pdq_flags & PDQ_TXOK) == 0) {
	PDQ_IFNET(sc)->if_drv_flags |= IFF_DRV_OACTIVE;
	return;
    }
    sc->sc_flags |= PDQIF_DOWNCALL;
    for (;; tx = 1) {
	IF_DEQUEUE(&ifp->if_snd, m);
	if (m == NULL)
	    break;
#if defined(PDQ_BUS_DMA) && !defined(PDQ_BUS_DMA_NOTX)
	if ((m->m_flags & M_HASTXDMAMAP) == 0) {
	    bus_dmamap_t map;
	    if (PDQ_OS_HDR_OFFSET != PDQ_RX_FC_OFFSET) {
		m->m_data[0] = PDQ_FDDI_PH0;
		m->m_data[1] = PDQ_FDDI_PH1;
		m->m_data[2] = PDQ_FDDI_PH2;
	    }
	    if (!bus_dmamap_create(sc->sc_dmatag, m->m_pkthdr.len, 255,
				   m->m_pkthdr.len, 0, BUS_DMA_NOWAIT, &map)) {
		if (!bus_dmamap_load_mbuf(sc->sc_dmatag, map, m,
					  BUS_DMA_WRITE|BUS_DMA_NOWAIT)) {
		    bus_dmamap_sync(sc->sc_dmatag, map, 0, m->m_pkthdr.len,
				    BUS_DMASYNC_PREWRITE);
		    M_SETCTX(m, map);
		    m->m_flags |= M_HASTXDMAMAP;
		}
	    }
	    if ((m->m_flags & M_HASTXDMAMAP) == 0)
		break;
	}
#else
	if (PDQ_OS_HDR_OFFSET != PDQ_RX_FC_OFFSET) {
	    m->m_data[0] = PDQ_FDDI_PH0;
	    m->m_data[1] = PDQ_FDDI_PH1;
	    m->m_data[2] = PDQ_FDDI_PH2;
	}
#endif

	if (pdq_queue_transmit_data(sc->sc_pdq, m) == PDQ_FALSE)
	    break;
    }
    if (m != NULL) {
	ifp->if_drv_flags |= IFF_DRV_OACTIVE;
	IF_PREPEND(&ifp->if_snd, m);
    }
    if (tx)
	PDQ_DO_TYPE2_PRODUCER(sc->sc_pdq);
    sc->sc_flags &= ~PDQIF_DOWNCALL;
}