#define DDS_DomainParticipantFactoryQos_INITIALIZER |
Initializer for new QoS instances.
New DDS_DomainParticipantFactoryQos instances stored on the stack should be initialized with this value before they are passed to any function. This step ensures that those contained QoS policies that use dynamic memory are properly initialized. This does not allocate memory.
The simplest way to create a new QoS structure is to initialize it on the stack at the time of its creation:
Note that the above assignment is not a substitute for calling DDS_DomainParticipantFactory_get_qos; that function should be called subsequently to setting the QoS. DDS_DomainParticipantFactoryQos_finalize should be called to free the contained QoS policies that use dynamic memory:
struct DDS_DomainParticipantFactoryQos myQos = DDS_DomainParticipantFactoryQos_INITIALIZER; DDS_DomainParticipantFactory_get_qos(myFactory, &myQos); DDS_DomainParticipantFactory_set_qos(myFactory, &myQos); DDS_DomainParticpiantFactoryQos_finalize(myFactory, &myQos);
typedef struct DDS_DomainParticipantFactoryImpl DDS_DomainParticipantFactory |
<<singleton>> <<interface>> Allows creation and destruction of DDS_DomainParticipant objects.
The sole purpose of this class is to allow the creation and destruction of DDS_DomainParticipant objects. This class itself is a <<singleton>>, and accessed via the get_instance() function, and destroyed with finalize_instance() function.
A single application can participate in multiple domains by instantiating multiple DDS_DomainParticipant objects.
An application may even instantiate multiple participants in the same domain. Participants in the same domain exchange data in the same way regardless of whether they are in the same application or different applications or on the same node or different nodes; their location is transparent.
There are two important caveats:
DDS_ReturnCode_t DDS_DomainParticipantFactoryQos_initialize | ( | struct DDS_DomainParticipantFactoryQos * | self | ) |
Initializer for new QoS instances.
New DDS_DomainParticipantFactoryQos instances on heap should be initialized with this function before they are passed to any function. This step ensures that those contained QoS policies that use dynamic memory are properly initialized. This function does not allocate memory.
Calling this function is not a substitute for calling DDS_DomainParticipantFactory_get_qos; that function should be called subsequently to setting the QoS of an existing factory. DDS_DomainParticipantFactoryQos_finalize should be called to free the contained QoS policies that use dynamic memory:
DDS_DomainParticipantFactoryQos *myQos = malloc(sizeof(struct DDS_DomainParticipantFactoryQos)); DDS_DomainParticipantQos_initialize(myQos); DDS_DomainParticipantFactory_get_qos(myFactory, myQos); DDS_DomainParticipantFactory_set_qos(myFactory, myQos); DDS_DomainParticipantFactoryQos_finalize(myQos); free(myQos);
self | <<in>> Cannot be NULL. |
DDS_ReturnCode_t DDS_DomainParticipantFactoryQos_copy | ( | struct DDS_DomainParticipantFactoryQos * | self, | |
const struct DDS_DomainParticipantFactoryQos * | source | |||
) |
Copy the contents of the given QoS into this QoS.
DDS_DomainParticipantFactoryQos instances can use dynamic memory because of the sequences contained in some QoS policies. A shallow copy by assignment is therefore unsafe. This function performs a deep-copy, allocating memory if necessary.
DDS_ReturnCode_t DDS_DomainParticipantFactoryQos_finalize | ( | struct DDS_DomainParticipantFactoryQos * | self | ) |
Free any dynamic memory allocated by the policies in this DDS_DomainParticipantFactoryQos.
Some QoS policies may use dynamic memory (regardless of whether the QoS itself is in dynamic memory). This function frees that memory but otherwise leaves this QoS unchanged. It should be called on all instances before they are freed (or, in the case of stack-based instances, before they go out of scope).
This function does not leave this object in an invalid state. It is permissable to clear a QoS and then subsequently allocate new dynamic memory in one or more of its QoS policies.
Note that if this QoS instance is stored in heap memory, calling this function will not call free() on it; the user is responsible for explicitly freeing any heap-based QoS instance after calling this function.
DDS_DomainParticipantFactory* DDS_DomainParticipantFactory_get_instance | ( | ) |
Gets the singleton instance of this class.
DDS_ReturnCode_t DDS_DomainParticipantFactory_finalize_instance | ( | ) |
<<eXtension>> Destroys the singleton instance of this class.
Only necessary to explicitly reclaim resources used by the participant factory singleton. Note that on many OSs, these resources are automatically reclaimed by the OS when the program terminates. However, some memory-check tools still flag these as unreclaimed. So this function provides a way to clean up memory used by the participant factory.
DDS_ReturnCode_t DDS_DomainParticipantFactory_set_default_participant_qos | ( | DDS_DomainParticipantFactory * | self, | |
const struct DDS_DomainParticipantQos * | qos | |||
) |
Sets the default DDS_DomainParticipantQos values for this domain participant factory.
This function may potentially allocate memory depending on the sequences contained in some QoS policies.
self | <<in>> Cannot be NULL. | |
qos | <<inout>> Qos to be filled up. The special value DDS_PARTICIPANT_QOS_DEFAULT may be passed as qos to indicate that the default QoS should be reset back to the initial values the factory would used if DDS_DomainParticipantFactory_set_default_participant_qos had never been called. Cannot be NULL. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_set_default_participant_qos_with_profile | ( | DDS_DomainParticipantFactory * | self, | |
const char * | library_name, | |||
const char * | profile_name | |||
) |
<<eXtension>> Sets the default DDS_DomainParticipantQos values for this domain participant factory based on the input XML QoS profile.
This function may potentially allocate memory depending on the sequences contained in some QoS policies.
This default value will be used for newly created DDS_DomainParticipant if DDS_PARTICIPANT_QOS_DEFAULT is specified as the qos
parameter when DDS_DomainParticipantFactory_create_participant is called.
self | <<in>> Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_default_participant_qos | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_DomainParticipantQos * | qos | |||
) |
Initializes the DDS_DomainParticipantQos instance with default values.
The retrieved qos
will match the set of values specified on the last successful call to DDS_DomainParticipantFactory_set_default_participant_qos, or DDS_DomainParticipantFactory_set_default_participant_qos_with_profile, or else, if the call was never made, the default values listed in DDS_DomainParticipantQos.
This function may potentially allocate memory depending on the sequences contained in some QoS policies.
DDS_DomainParticipant* DDS_DomainParticipantFactory_create_participant | ( | DDS_DomainParticipantFactory * | self, | |
DDS_DomainId_t | domainId, | |||
const struct DDS_DomainParticipantQos * | qos, | |||
const struct DDS_DomainParticipantListener * | listener, | |||
DDS_StatusMask | mask | |||
) |
Creates a new DDS_DomainParticipant object.
Note that if there is a single participant per host in a given domain, the participant index can be left at the default value (-1).
listener
is specified, none of the listener callback functions can be NULL. self | <<in>> Cannot be NULL. | |
domainId | <<in>> ID of the domain that the application intends to join. [range] [>=0], and does not violate guidelines stated in DDS_RtpsWellKnownPorts_t. | |
qos | <<in>> the DomainParticipant's QoS. The special value DDS_PARTICIPANT_QOS_DEFAULT can be used to indicate that the DDS_DomainParticipant should be created with the default DDS_DomainParticipantQos set in the DDS_DomainParticipantFactory. Cannot be NULL. | |
listener | <<in>> the domain participant's listener. | |
mask | <<in>>. Changes of communication status to be invoked on the listener. |
DDS_DomainParticipantQos for rules on consistency among QoS
DDS_DomainParticipantFactory_create_participant_with_profile()
DDS_DomainParticipant* DDS_DomainParticipantFactory_create_participant_with_profile | ( | DDS_DomainParticipantFactory * | self, | |
DDS_DomainId_t | domainId, | |||
const char * | library_name, | |||
const char * | profile_name, | |||
const struct DDS_DomainParticipantListener * | listener, | |||
DDS_StatusMask | mask | |||
) |
<<eXtension>> Creates a new DDS_DomainParticipant object using the DDS_DomainParticipantQos associated with the input XML QoS profile.
Note that if there is a single participant per host in a given domain, the participant index can be left at the default value (-1).
listener
is specified, none of the listener callback functions can be NULL. self | <<in>> Cannot be NULL. | |
domainId | <<in>> ID of the domain that the application intends to join. [range] [>=0], and does not violate guidelines stated in DDS_RtpsWellKnownPorts_t. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). | |
listener | <<in>> the DomainParticipant's listener. | |
mask | <<in>>. Changes of communication status to be invoked on the listener. |
DDS_DomainParticipantQos for rules on consistency among QoS
DDS_DomainParticipantFactory_create_participant()
DDS_ReturnCode_t DDS_DomainParticipantFactory_delete_participant | ( | DDS_DomainParticipantFactory * | self, | |
DDS_DomainParticipant * | a_participant | |||
) |
Deletes an existing DDS_DomainParticipant.
self | <<in>> Cannot be NULL. | |
a_participant | <<in>> DDS_DomainParticipant to be deleted. |
DDS_DomainParticipant* DDS_DomainParticipantFactory_lookup_participant | ( | DDS_DomainParticipantFactory * | self, | |
DDS_DomainId_t | domainId | |||
) |
Locates an existing DDS_DomainParticipant.
If no such DDS_DomainParticipant exists, the operation will return NULL value.
If multiple DDS_DomainParticipant entities belonging to that domainId exist, then the operation will return one of them. It is not specified which one.
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_qos | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_DomainParticipantFactoryQos * | qos | |||
) |
DDS_ReturnCode_t DDS_DomainParticipantFactory_set_qos | ( | DDS_DomainParticipantFactory * | self, | |
const struct DDS_DomainParticipantFactoryQos * | qos | |||
) |
Sets the value for a participant factory QoS.
The DDS_DomainParticipantFactoryQos::entity_factory can be changed. The other policies are immutable.
Note that despite having QoS, the DDS_DomainParticipantFactory is not an DDS_Entity.
self | <<in>> Cannot be NULL. | |
qos | <<in>> Set of policies to be applied to DDS_DomainParticipantFactory. Policies must be consistent. Immutable policies can only be changed before calling any other RTI Data Distribution Service functions except for DDS_DomainParticipantFactory_get_qos Cannot be NULL. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_load_profiles | ( | DDS_DomainParticipantFactory * | self | ) |
<<eXtension>> Loads the XML QoS profiles.
The XML QoS profiles are loaded implicitly after the first DDS_DomainParticipant is created or explicitly, after a call to this function.
This has the same effect as DDS_DomainParticipantFactory_reload_profiles().
self | <<in>> Cannot be NULL. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_reload_profiles | ( | DDS_DomainParticipantFactory * | self | ) |
<<eXtension>> Reloads the XML QoS profiles.
The XML QoS profiles are loaded implicitly after the first DDS_DomainParticipant is created or explicitly, after a call to this function.
This has the same effect as DDS_DomainParticipantFactory_load_profiles().
self | <<in>> Cannot be NULL. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_unload_profiles | ( | DDS_DomainParticipantFactory * | self | ) |
<<eXtension>> Unloads the XML QoS profiles.
The resources associated with the XML QoS profiles are freed. Any reference to the profiles after calling this function will fail with an error.
self | <<in>> Cannot be NULL. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_set_default_library | ( | DDS_DomainParticipantFactory * | self, | |
const char * | library_name | |||
) |
<<eXtension>> Sets the default XML library for a DDS_DomainParticipantFactory.
Any API requiring a library_name as a parameter can use null to refer to the default library.
self | <<in>> Cannot be NULL. | |
library_name | <<in>> Library name. If library_name is null any previous default is unset. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_set_default_profile | ( | DDS_DomainParticipantFactory * | self, | |
const char * | library_name, | |||
const char * | profile_name | |||
) |
<<eXtension>> Sets the default XML profile for a DDS_DomainParticipantFactory.
This function specifies the profile that will be used as the default the next time a default DomainParticipantFactory profile is needed during a call to a DomainParticipantFactory function. When calling a DDS_DomainParticipantFactory function that requires a profile_name
parameter, you can use NULL to refer to the default profile. (This same information applies to setting a default library.)
This function does not set the default QoS for newly created DomainParticipants; for this functionality, use DDS_DomainParticipantFactory_set_default_participant_qos_with_profile (you may pass in NULL after having called set_default_profile()).
self | <<in>> Cannot be NULL. | |
library_name | <<in>> The library name containing the profile. | |
profile_name | <<in>> The profile name. If profile_name is null any previous default is unset. |
const char* DDS_DomainParticipantFactory_get_default_library | ( | DDS_DomainParticipantFactory * | self | ) |
<<eXtension>> Gets the default XML library associated with a DDS_DomainParticipantFactory.
self | <<in>> Cannot be NULL. |
const char* DDS_DomainParticipantFactory_get_default_profile | ( | DDS_DomainParticipantFactory * | self | ) |
<<eXtension>> Gets the default XML profile associated with a DDS_DomainParticipantFactory.
self | <<in>> Cannot be NULL. |
const char* DDS_DomainParticipantFactory_get_default_profile_library | ( | DDS_DomainParticipantFactory * | self | ) |
<<eXtension>> Gets the library where the default XML profile is contained for a DDS_DomainParticipantFactory.
The default profile library is automatically set when DDS_DomainParticipantFactory_set_default_profile is called.
This library can be different than the DDS_DomainParticipantFactory default library (see DDS_DomainParticipantFactory_get_default_library).
self | <<in>> Cannot be NULL. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_participant_qos_from_profile | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_DomainParticipantQos * | qos, | |||
const char * | library_name, | |||
const char * | profile_name | |||
) |
<<eXtension>> Gets the DDS_DomainParticipantQos values associated with the input XML QoS profile.
self | <<in>> Cannot be NULL. | |
qos | <<out>> Qos to be filled up. Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_publisher_qos_from_profile | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_PublisherQos * | qos, | |||
const char * | library_name, | |||
const char * | profile_name | |||
) |
<<eXtension>> Gets the DDS_PublisherQos values associated with the input XML QoS profile.
self | <<in>> Cannot be NULL. | |
qos | <<out>> Qos to be filled up. Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_subscriber_qos_from_profile | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_SubscriberQos * | qos, | |||
const char * | library_name, | |||
const char * | profile_name | |||
) |
<<eXtension>> Gets the DDS_SubscriberQos values associated with the input XML QoS profile.
self | <<in>> Cannot be NULL. | |
qos | <<out>> Qos to be filled up. Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_datareader_qos_from_profile | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_DataReaderQos * | qos, | |||
const char * | library_name, | |||
const char * | profile_name | |||
) |
<<eXtension>> Gets the DDS_DataReaderQos values associated with the input XML QoS profile.
self | <<in>> Cannot be NULL. | |
qos | <<out>> Qos to be filled up. Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_datareader_qos_from_profile_w_topic_name | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_DataReaderQos * | qos, | |||
const char * | library_name, | |||
const char * | profile_name, | |||
const char * | topic_name | |||
) |
<<eXtension>> Gets the DDS_DataReaderQos values associated with the input XML QoS profile while applying topic filters to the input topic name.
self | <<in>> Cannot be NULL. | |
qos | <<out>> Qos to be filled up. Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). | |
topic_name | <<in>> Topic name that will be evaluated against the topic_filter attribute in the XML QoS profile. If topic_name is null, RTI Data Distribution Service will match only QoSs without explicit topic_filter expressions. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_datawriter_qos_from_profile | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_DataWriterQos * | qos, | |||
const char * | library_name, | |||
const char * | profile_name | |||
) |
<<eXtension>> Gets the DDS_DataWriterQos values associated with the input XML QoS profile.
self | <<in>> Cannot be NULL. | |
qos | <<out>> Qos to be filled up. Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_datawriter_qos_from_profile_w_topic_name | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_DataWriterQos * | qos, | |||
const char * | library_name, | |||
const char * | profile_name, | |||
const char * | topic_name | |||
) |
<<eXtension>> Gets the DDS_DataWriterQos values associated with the input XML QoS profile while applying topic filters to the input topic name.
self | <<in>> Cannot be NULL. | |
qos | <<out>> Qos to be filled up. Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). | |
topic_name | <<in>> Topic name that will be evaluated against the topic_filter attribute in the XML QoS profile. If topic_name is null, RTI Data Distribution Service will match only QoSs without explicit topic_filter expressions. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_topic_qos_from_profile | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_TopicQos * | qos, | |||
const char * | library_name, | |||
const char * | profile_name | |||
) |
<<eXtension>> Gets the DDS_TopicQos values associated with the input XML QoS profile.
self | <<in>> Cannot be NULL. | |
qos | <<out>> Qos to be filled up. Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_topic_qos_from_profile_w_topic_name | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_TopicQos * | qos, | |||
const char * | library_name, | |||
const char * | profile_name, | |||
const char * | topic_name | |||
) |
<<eXtension>> Gets the DDS_TopicQos values associated with the input XML QoS profile while applying topic filters to the input topic name.
self | <<in>> Cannot be NULL. | |
qos | <<out>> Qos to be filled up. Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). | |
profile_name | <<in>> XML QoS Profile name. If profile_name is null RTI Data Distribution Service will use the default profile (see DDS_DomainParticipantFactory_set_default_profile). | |
topic_name | <<in>> Topic name that will be evaluated against the topic_filter attribute in the XML QoS profile. If topic_name is null, RTI Data Distribution Service will match only QoSs without explicit topic_filter expressions. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_qos_profile_libraries | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_StringSeq * | library_names | |||
) |
<<eXtension>> Gets the names of all XML QoS profile libraries associated with the DDS_DomainParticipantFactory
self | <<in>> Cannot be NULL. | |
library_names | <<out>> DDS_StringSeq to be filled with names of XML QoS profile libraries. Cannot be NULL. |
DDS_ReturnCode_t DDS_DomainParticipantFactory_get_qos_profiles | ( | DDS_DomainParticipantFactory * | self, | |
struct DDS_StringSeq * | profile_names, | |||
const char * | library_name | |||
) |
<<eXtension>> Gets the names of all XML QoS profiles associated with the input XML QoS profile library.
self | <<in>> Cannot be NULL. | |
profile_names | <<out>> DDS_StringSeq to be filled with names of XML QoS profiles. Cannot be NULL. | |
library_name | <<in>> Library name containing the XML QoS profile. If library_name is null RTI Data Distribution Service will use the default library (see DDS_DomainParticipantFactory_set_default_library). |
DDS_ReturnCode_t DDS_DomainParticipantFactory_unregister_thread | ( | DDS_DomainParticipantFactory * | self | ) |
<<eXtension>> Allows the user to release thread specific resources kept by the middleware.
This function should be called by the user right before exiting a thread where DDS API were used. In this way the middleware will be able to free all the resources related to this specific thread. The best approach is to call the function during the thread deletion after all the DDS related API have have been called.
self | <<in>> Cannot be NULL. |
Special value for creating a DomainParticipant with default QoS.
When used in DDS_DomainParticipantFactory_create_participant, this special value is used to indicate that the DDS_DomainParticipant should be created with the default DDS_DomainParticipant QoS by means of the operation DDS_DomainParticipantFactory_get_default_participant_qos() and using the resulting QoS to create the DDS_DomainParticipant.
When used in DDS_DomainParticipantFactory_set_default_participant_qos, this special value is used to indicate that the default QoS should be reset back to the initial value that would be used if the DDS_DomainParticipantFactory_set_default_participant_qos operation had never been called.
When used in DDS_DomainParticipant_set_qos, this special value is used to indicate that the QoS of the DDS_DomainParticipant should be changed to match the current default QoS set in the DDS_DomainParticipantFactory that the DDS_DomainParticipant belongs to.
RTI Data Distribution Service treats this special value as a constant.
Note: You cannot use this value to get the default QoS values from the DomainParticipant factory; for this purpose, use DDS_DomainParticipantFactory_get_default_participant_qos.
DDS_DomainParticipantFactory_create_participant()