static Endpoint_t *create_builtin_reader (Domain_t *dp,
Builtin_Type_t type,
const char *topic_name,
const char *type_name)
{
TopicType_t *typep;
Topic_t *tp;
Reader_t *rp;
DDS_TopicQos qos_data;
typep = type_create (dp, type_name, NULL);
if (!typep)
return (NULL);
typep->flags = EF_LOCAL | EF_BUILTIN;
typep->index = type;
tp = topic_create (&dp->participant, NULL, topic_name, type_name, NULL);
if (!tp)
return (NULL);
tp->entity.flags |= EF_ENABLED | EF_BUILTIN | EF_NOT_IGNORED;
qos_data = qos_def_topic_qos;
qos_data.durability.kind = DDS_TRANSIENT_LOCAL_DURABILITY_QOS;
qos_data.reliability.kind = DDS_RELIABLE_RELIABILITY_QOS;
tp->qos = qos_topic_new (&qos_data);
if (!tp->qos) {
topic_delete (&dp->participant, tp, NULL, NULL);
return (NULL);
}
rp = DDS_Subscriber_create_datareader (dp->builtin_subscriber,
(DDS_TopicDescription) tp,
DDS_DATAREADER_QOS_USE_TOPIC_QOS,
NULL, 0);
if (!rp) {
topic_delete (&dp->participant, tp, NULL, NULL);
return (NULL);
}
dp->builtin_readers [type] = rp;
#ifdef RTPS_USED
if (rtps_used)
disc_populate_builtin (dp, type);
#endif
return (&rp->r_ep);
}
static void delete_builtin_reader (Domain_t *dp,
Builtin_Type_t type,
Topic_t *tp)
{
/* Remove the cache reference. */
dp->builtin_readers [type] = NULL;
/* Delete the builtin datareader. */
DDS_Subscriber_delete_datareader ((DDS_Subscriber) dp->builtin_subscriber,
(DDS_DataReader) tp->readers);
/* Delete builtin topic. */
lock_take (tp->lock);
topic_delete (&dp->participant, tp, NULL, NULL);
}
DDS_ReturnCode_t DDS_DomainParticipant_delete_topic (DDS_DomainParticipant dp,
DDS_Topic tp)
{
DDS_ReturnCode_t ret;
Condition_t *cp;
ctrc_begind (DCPS_ID, DCPS_DP_D_TOP, &dp, sizeof (dp));
ctrc_contd (&tp, sizeof (tp));
ctrc_endd ();
prof_start (dcps_delete_topic_p);
/* Get Domain Participant. */
if (!domain_ptr (dp, 1, &ret)) {
log_printf (DCPS_ID, 0, "dcps_delete_topic(): domain participant not found!\r\n");
return (ret);
}
/* Get Topic descriptor. */
if (!topic_ptr (tp, 0, &ret)) {
lock_release (dp->lock);
return (ret);
}
if ((tp->entity.flags & EF_FILTERED) != 0) {
lock_release (dp->lock);
return (DDS_RETCODE_PRECONDITION_NOT_MET);
}
if (tp->domain != dp || (!tp->nlrefs && !tp->nrrefs)) {
log_printf (DCPS_ID, 0, "dcps_delete_topic(): invalid topic!\r\n");
lock_release (dp->lock);
return (DDS_RETCODE_ALREADY_DELETED);
}
lock_take (tp->lock);
/* If not the last topic reference, just update the reference count. */
if (tp->nlrefs > 1 || !tp->nlrefs) {
if (tp->nlrefs)
tp->nlrefs--;
lock_release (tp->lock);
lock_release (dp->lock);
return (DDS_RETCODE_OK);
}
/* Check if there are still references, i.e. local readers/writers, of
this topic. */
if (local_endpoints (tp->readers) || local_endpoints (tp->writers)) {
log_printf (DCPS_ID, 0, "dcps_delete_topic(%s): still endpoints using topic!\r\n", str_ptr (tp->name));
lock_release (tp->lock);
lock_release (dp->lock);
return (DDS_RETCODE_PRECONDITION_NOT_MET);
}
/* Last local reference. Disable event propagation to topic. */
if (!dds_purge_notifications ((Entity_t *) tp, DDS_ALL_STATUS, 1)) {
lock_release (tp->lock);
lock_release (dp->lock);
return (DDS_RETCODE_PRECONDITION_NOT_MET);
}
tp->entity.flags &= ~EF_ENABLED;
/* Delete topic notification data. */
memset (&tp->listener, 0, sizeof (tp->listener));
tp->mask = 0;
/* Delete StatusCondition if it exists. */
if (tp->condition) {
cp = (Condition_t *) tp->condition;
if (cp->deferred)
dds_defer_waitset_undo (tp, tp->condition);
dcps_delete_status_condition (tp->condition);
tp->condition = NULL;
}
/* Delete topic data. */
topic_delete (&dp->participant, tp, NULL, NULL);
lock_release (dp->lock);
prof_stop (dcps_delete_topic_p, 1);
return (DDS_RETCODE_OK);
}
