static XSub()
{
s_sendSubscription = (data, size, arg) => {
Pipe pipe = (Pipe) arg;
// Create the subsctription message.
Msg msg = new Msg(size + 1);
msg.Put((byte)1);
msg.Put(data,1, size);
// Send it to the pipe.
bool sent = pipe.Write (msg);
// If we reached the SNDHWM, and thus cannot send the subscription, drop
// the subscription message instead. This matches the behaviour of
// zmq_setsockopt(ZMQ_SUBSCRIBE, ...), which also drops subscriptions
// when the SNDHWM is reached.
if (!sent)
msg.Close ();
};
}
public bool Send(Msg msg, SendRecieveOptions flags)
{
// Drop the message if required. If we are at the end of the message
// switch back to non-dropping mode.
if (m_dropping) {
m_more = msg.HasMore;
m_dropping = m_more;
msg.Close ();
return true;
}
while (m_active > 0) {
if (m_pipes[m_current].Write (msg))
break;
Debug.Assert(!m_more);
m_active--;
if (m_current < m_active)
Utils.Swap (m_pipes, m_current, m_active);
else
m_current = 0;
}
// If there are no pipes we cannot send the message.
if (m_active == 0) {
ZError.ErrorNumber = ErrorNumber.EAGAIN;
return false;
}
// If it's part of the message we can fluch it downstream and
// continue round-robinning (load balance).
m_more = msg.HasMore;
if (!m_more) {
m_pipes[m_current].Flush();
if (m_active > 1)
m_current = (m_current + 1) % m_active;
}
return true;
}