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INtime SDK v7.1 > About INtime > Networking and I/O > High-Performance Ethernet > hpeSetTransmitQueueAttributes

Sets the type of a given transmit queue.

HPESTATUS hpeSetTransmitQueueAttributes(
    HPEHANDLE devhandle, 
    DWORD queue_index, 
    DWORD tx_attribs


A handle value for the device.
The index of the designated queue.
The valid attributes are:
HPE_TX_TIMESTAMP_1STEP Place a 1588 timestamp within the packet.
HPE_TX_TIMESTAMP_2STEP Make a timestamp available post transmission.
HPE_TX_STREAM Launch packets at specific time offsets.
HPE_TX_STICKY The queue has persistent buffers.
HPE_TX_NONOTIFY Do not signal when a TX interrupt occurs. Use this option when polling mode is desired but interrupts must be enabled for hpeSetTargetTimerhpeGetTransmitQueueState must be used to detect transmit completion (as would be done when NO_INTERRUPTS is specified).


HPE_TX_TIMESTAMP_1STEP and HPE_TX_TIMESTAMP_2STEP are mutually exclusive. Enabling 2STEP time stamping on more than one queue may yield erroneous results.

HPE_TX_STICKY queue may be used only in conjunction with HPE_TX_STREAM queues. Once attached, the buffers are not detached. Launch time may be adjusted by setting the launch_time field in the HPETXSTREAMBUFFERSET structure (possibly to 0) and calling hpeSetTransmitOffset.

Return Values

A status value indicating the success or failure of the operation:

E_OK The operation completed successfully.
E_EXIST The handle given is not a handle for an open HPE interface.
E_PARAM The rx_queue_type parameter is invalid.
E_LIMIT The queue_index parameter is out of range for the current hardware interface.
E_SUPPORT The device does not support multi-queue or filter operations.


Versions Defined in Include Link to
INtime 6.0 (HPE3) intime/rt/include/hpeif2.h hpeif2.h hpeif2.lib
See Also