C++ (Cpp) RTE_MBUF_METADATA_UINT32 примеры использования

Пример #1

Файл: rte_table_array.c Проект: DrenfongWong/dpdk

static int
rte_table_array_lookup(
	void *table,
	struct rte_mbuf **pkts,
	uint64_t pkts_mask,
	uint64_t *lookup_hit_mask,
	void **entries)
{
	struct rte_table_array *t = (struct rte_table_array *) table;
	__rte_unused uint32_t n_pkts_in = __builtin_popcountll(pkts_mask);
	RTE_TABLE_ARRAY_STATS_PKTS_IN_ADD(t, n_pkts_in);
	*lookup_hit_mask = pkts_mask;

	if ((pkts_mask & (pkts_mask + 1)) == 0) {
		uint64_t n_pkts = __builtin_popcountll(pkts_mask);
		uint32_t i;

		for (i = 0; i < n_pkts; i++) {
			struct rte_mbuf *pkt = pkts[i];
			uint32_t entry_pos = RTE_MBUF_METADATA_UINT32(pkt,
				t->offset) & t->entry_pos_mask;

			entries[i] = (void *) &t->array[entry_pos *
				t->entry_size];
		}
	} else {
		for ( ; pkts_mask; ) {
			uint32_t pkt_index = __builtin_ctzll(pkts_mask);
			uint64_t pkt_mask = 1LLU << pkt_index;
			struct rte_mbuf *pkt = pkts[pkt_index];
			uint32_t entry_pos = RTE_MBUF_METADATA_UINT32(pkt,
				t->offset) & t->entry_pos_mask;

			entries[pkt_index] = (void *) &t->array[entry_pos *
				t->entry_size];
			pkts_mask &= ~pkt_mask;
		}
	}

	return 0;
}

Пример #2

Файл: rte_table_lpm.c Проект: P4-vSwitch/dpdk

static int
rte_table_lpm_lookup(
	void *table,
	struct rte_mbuf **pkts,
	uint64_t pkts_mask,
	uint64_t *lookup_hit_mask,
	void **entries)
{
	struct rte_table_lpm *lpm = (struct rte_table_lpm *) table;
	uint64_t pkts_out_mask = 0;
	uint32_t i;

	__rte_unused uint32_t n_pkts_in = __builtin_popcountll(pkts_mask);
	RTE_TABLE_LPM_STATS_PKTS_IN_ADD(lpm, n_pkts_in);

	pkts_out_mask = 0;
	for (i = 0; i < (uint32_t)(RTE_PORT_IN_BURST_SIZE_MAX -
		__builtin_clzll(pkts_mask)); i++) {
		uint64_t pkt_mask = 1LLU << i;

		if (pkt_mask & pkts_mask) {
			struct rte_mbuf *pkt = pkts[i];
			uint32_t ip = rte_bswap32(
				RTE_MBUF_METADATA_UINT32(pkt, lpm->offset));
			int status;
			uint8_t nht_pos;

			status = rte_lpm_lookup(lpm->lpm, ip, &nht_pos);
			if (status == 0) {
				pkts_out_mask |= pkt_mask;
				entries[i] = (void *) &lpm->nht[nht_pos *
					lpm->entry_size];
			}
		}
	}

	*lookup_hit_mask = pkts_out_mask;
	RTE_TABLE_LPM_STATS_PKTS_LOOKUP_MISS(lpm, n_pkts_in - __builtin_popcountll(pkts_out_mask));
	return 0;
}