bool Protocol::write(SizedWriter& writer)
{
// End any current write.
writer.stopWrite();
// Skip if this connection is not active (e.g. when there are several
// logical mcast connections but only one write is actually needed).
if (!getConnection().isActive())
return false;
this->writer = &writer;
bool replied = false;
yAssert(delegate != nullptr);
getStreams().beginPacket(); // Message begins.
bool ok = delegate->write(*this, writer);
getStreams().endPacket(); // Message ends.
PortReader* reply = writer.getReplyHandler();
if (reply != nullptr) {
if (!delegate->supportReply()) {
// We are expected to get a reply, but cannot.
YARP_INFO(log, std::string("connection ") + getRoute().toString() + " does not support replies (try \"tcp\" or \"text_ack\")");
}
if (ok) {
// Read reply.
reader.reset(is(), &getStreams(), getRoute(), messageLen, delegate->isTextMode(), delegate->isBareMode());
replied = reply->read(reader);
}
}
expectAck(); // Expect acknowledgement (carrier-specific).
this->writer = nullptr;
return replied;
}
void Protocol::reply(SizedWriter& writer)
{
writer.stopWrite();
delegate->reply(*this, writer);
pendingReply = false;
}
