RTI Connext C API Version 7.3.0

<<extension>> Specifies how RTI Connext sends application data on the network. This QoS policy can be used to tell RTI Connext to use its own thread to send data, instead of the user thread. More...

Data Structures

struct  DDS_PublishModeQosPolicy
 Specifies how RTI Connext sends application data on the network. This QoS policy can be used to tell RTI Connext to use its own thread to send data, instead of the user thread. More...
 

Macros

#define DDS_PUBLICATION_PRIORITY_UNDEFINED
 Initializer value for DDS_PublishModeQosPolicy::priority and/or DDS_ChannelSettings_t::priority. More...
 
#define DDS_PUBLICATION_PRIORITY_AUTOMATIC
 Constant value for DDS_PublishModeQosPolicy::priority and/or DDS_ChannelSettings_t::priority. More...
 

Enumerations

enum  DDS_PublishModeQosPolicyKind {
  DDS_SYNCHRONOUS_PUBLISH_MODE_QOS ,
  DDS_ASYNCHRONOUS_PUBLISH_MODE_QOS
}
 Kinds of publishing mode. More...
 

Variables

const char *const DDS_PUBLISHMODE_QOS_POLICY_NAME
 Stringified human-readable name for DDS_PublishModeQosPolicy. More...
 

Detailed Description

<<extension>> Specifies how RTI Connext sends application data on the network. This QoS policy can be used to tell RTI Connext to use its own thread to send data, instead of the user thread.

Macro Definition Documentation

◆ DDS_PUBLICATION_PRIORITY_UNDEFINED

#define DDS_PUBLICATION_PRIORITY_UNDEFINED

Initializer value for DDS_PublishModeQosPolicy::priority and/or DDS_ChannelSettings_t::priority.

When assigned this value, the publication priority of the data writer, or channel of a multi-channel data writer, will be set to the lowest possible value. For muilti-channel data writers, if either the data writer or channel priority is NOT set to this value, then the publication priority of the entity will be set to the defined value.

◆ DDS_PUBLICATION_PRIORITY_AUTOMATIC

#define DDS_PUBLICATION_PRIORITY_AUTOMATIC

Constant value for DDS_PublishModeQosPolicy::priority and/or DDS_ChannelSettings_t::priority.

When assigned this value, the publication priority of the data writer, or channel of a multi-channel data writer, will be set to the largest priority value of any sample currently queued for publication by the data writer or data writer channel.

Enumeration Type Documentation

◆ DDS_PublishModeQosPolicyKind

Kinds of publishing mode.

QoS:
DDS_PublishModeQosPolicy
Enumerator
DDS_SYNCHRONOUS_PUBLISH_MODE_QOS 

Indicates to send data synchronously.

If DDS_DataWriterProtocolQosPolicy::push_on_write is DDS_BOOLEAN_TRUE, data is sent immediately in the context of FooDataWriter_write.

As data is sent immediately in the context of the user thread, no flow control is applied.

See also
DDS_DataWriterProtocolQosPolicy::push_on_write

[default] for DDS_DataWriter

DDS_ASYNCHRONOUS_PUBLISH_MODE_QOS 

Indicates to send data asynchronously.

Configures the DDS_DataWriter to delegate the task of data transmission to a separate publishing thread. The FooDataWriter_write call does not send the data, but instead schedules the data to be sent later by its associated DDS_Publisher.

Each DDS_Publisher uses its dedicated publishing thread (DDS_PublisherQos::asynchronous_publisher) to send data for all its asynchronous DataWriters. For each asynchronous DataWriter, the associated DDS_FlowController determines when the publishing thread is allowed to send the data.

DDS_DataWriter_wait_for_asynchronous_publishing and DDS_Publisher_wait_for_asynchronous_publishing enable you to determine when the data has actually been sent.

See also
DDS_FlowController
DDS_HistoryQosPolicy
DDS_DataWriter_wait_for_asynchronous_publishing
DDS_Publisher_wait_for_asynchronous_publishing
NDDS_Transport_Property_t::gather_send_buffer_count_max

Variable Documentation

◆ DDS_PUBLISHMODE_QOS_POLICY_NAME

const char* const DDS_PUBLISHMODE_QOS_POLICY_NAME
extern

Stringified human-readable name for DDS_PublishModeQosPolicy.