virtual bool connectionAdded( base::ChannelElementBase::shared_ptr channel_input, ConnPolicy const& policy ) {
// Initialize the new channel with last written data if requested
// (and available)
// This this the input channel element of the whole connection
typename base::ChannelElement<T>::shared_ptr channel_el_input =
static_cast< base::ChannelElement<T>* >(channel_input.get());
if (written)
{
typename internal::AssignableDataSource<T>::shared_ptr last_written_value = this->last_written_value;
if (last_written_value)
{
T sample = last_written_value->get();
if ( channel_el_input->data_sample(sample) ) {
if ( policy.init )
return channel_el_input->write(sample);
return true;
} else {
Logger::In in("OutputPort");
log(Error) << "Failed to pass data sample to data channel. Aborting connection."<<endlog();
return false;
}
}
}
// even if we're not written, test the connection with a default sample.
return channel_el_input->data_sample( T() );
}
virtual bool inputReady() {
if ( mqReady(read_sample, this) ) {
typename base::ChannelElement<T>::shared_ptr output =
this->getOutput();
assert(output);
output->data_sample(read_sample->rvalue());
return true;
}
return false;
}
bool do_init(typename base::ChannelElement<T>::param_t sample, const internal::ConnectionManager::ChannelDescriptor& descriptor)
{
typename base::ChannelElement<T>::shared_ptr output
= boost::static_pointer_cast< base::ChannelElement<T> >(descriptor.get<1>());
if (output->data_sample(sample))
return false;
else
{
log(Error) << "A channel of port " << getName() << " has been invalidated during setDataSample(), it will be removed" << endlog();
return true;
}
}