[dpdk-dev] Bulk dequeue of packets and the returned values, question

Wiles, Roger Keith keith.wiles at windriver.com
Sun Sep 28 20:04:42 CEST 2014


I am also looking at the bulk dequeue routines, which the ring can be fixed or variable. On fixed  < 0 on error is returned and 0 if successful. On a variable ring < 0 on error or n on success, but I think n can be zero in the variable case, correct?

If these are true then why not have the routines return  < 0 on error and >= 0 on success. Which means a dequeue from a fixed ring would return only ’requested size n’ or < 0 if you error off the 0 case. The 0 case could be OK, if you allow zero to be return on a empty ring for the fixed ring case.

Does this make sense to anyone?

Thanks
++Keith

Keith Wiles, Principal Technologist with CTO office, Wind River mobile 972-213-5533



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