```
5. Packet receive
- - Api call memif\_rx\_burst will set all required fields in memif buffers provided by user application and dequeue received buffers.
+ - Api call memif\_rx\_burst will set all required fields in memif buffers provided by user application, dequeue received buffers and consume interrupt event on receive queue. The event is not consumed, if memif_rx_burst fails.
```C
err = memif_rx_burst (c->conn, qid, c->bufs, MAX_MEMIF_BUFS, &rx);
```
@param count - number of memif buffers to receive
@param rx - returns number of received buffers
+ Consume interrupt event for receive queue.
+ The event is not consumed, if memif_rx_burst fails.
+
\return memif_err_t
*/
int memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
*rx = 0;
uint64_t b;
- ssize_t r = read (mq->int_fd, &b, sizeof (b));
- if (EXPECT_FALSE ((r == -1) && (errno != EAGAIN)))
- return memif_syscall_error_handler (errno);
+ ssize_t r;
cur_slot = (c->args.is_master) ? mq->last_head : mq->last_tail;
last_slot = (c->args.is_master) ? ring->head : ring->tail;
if (cur_slot == last_slot)
- return MEMIF_ERR_SUCCESS;
+ {
+ r = read (mq->int_fd, &b, sizeof (b));
+ if (EXPECT_FALSE ((r == -1) && (errno != EAGAIN)))
+ return memif_syscall_error_handler (errno);
+
+ return MEMIF_ERR_SUCCESS;
+ }
ns = last_slot - cur_slot;
return MEMIF_ERR_NOBUF;
}
+ r = read (mq->int_fd, &b, sizeof (b));
+ if (EXPECT_FALSE ((r == -1) && (errno != EAGAIN)))
+ return memif_syscall_error_handler (errno);
+
return MEMIF_ERR_SUCCESS; /* 0 */
}