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holoscan::dds_qos::apply_writer_qos

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void holoscan::dds_qos::apply_writer_qos(
    eprosima::fastdds::dds::DataWriterQos &dds_qos,
    const nvidia::gxf::QoSProfile &qos
)

Map a GXF QoSProfile struct to FastDDS DataWriterQos.

Maps all QoSProfile fields to their DDS equivalents:

  • reliability, durability, history, depth: core QoS policies
  • priority: DDS TransportPriorityQosPolicy
  • max_blocking_time_ns: DDS ReliabilityQosPolicy.max_blocking_time
  • deadline_ns: DDS DeadlineQosPolicy.period
  • lifespan_ns: DDS LifespanQosPolicy.duration

DDS-specific resource_limits tuning is derived from history policy/depth (no GXF-level equivalent).

Parameters

dds_qos
eprosima::fastdds::dds::DataWriterQos &

The DataWriterQos to configure (modified in-place). Must be freshly default-initialized (e.g. DATAWRITER_QOS_DEFAULT). Reusing a previously configured object may leave stale values for fields that this mapping does not set (deadline, lifespan, resource_limits).

qos
const nvidia::gxf::QoSProfile &

The GXF QoSProfile to map from.

See also: docs/PUBSUB_DESIGN/DDS_BACKEND_ADOPT_NEW_GXF_APIS.md §3