protected override bool XRecv(SendReceiveOptions flags, out Msg msg)
{
// If there's already a message prepared by a previous call to zmq_poll,
// return it straight ahead.
if (m_hasMessage)
{
msg = new Msg(m_message);
m_hasMessage = false;
m_more = msg.HasMore;
return(true);
}
// TODO: This can result in infinite loop in the case of continuous
// stream of non-matching messages which breaks the non-blocking recv
// semantics.
while (true)
{
// Get a message using fair queueing algorithm.
bool isMessageAvailable = m_fq.Recv(out msg);
// If there's no message available, return immediately.
// The same when error occurs.
if (!isMessageAvailable)
{
return(false);
}
else if (msg == null)
{
return(true);
}
// Check whether the message matches at least one subscription.
// Non-initial parts of the message are passed
if (m_more || !m_options.Filter || Match(msg))
{
m_more = msg.HasMore;
return(true);
}
// Message doesn't match. Pop any remaining parts of the message
// from the pipe.
while (msg.HasMore)
{
m_fq.Recv(out msg);
Debug.Assert(msg != null);
}
}
}
private bool xxrecv(SendReceiveOptions flags, ref Msg msg)
{
// If there is a prefetched message, return it.
if (m_prefetched)
{
msg.Move(ref m_prefetchedMsg);
m_prefetched = false;
return(true);
}
// DEALER socket doesn't use identities. We can safely drop it and
while (true)
{
bool isMessageAvailable = m_fq.Recv(ref msg);
if (!isMessageAvailable)
{
return(false);
}
if ((msg.Flags & MsgFlags.Identity) == 0)
{
break;
}
}
return(true);
}
private bool xxrecv(SendReceiveOptions flags_, out Msg msg_)
{
msg_ = null;
// If there is a prefetched message, return it.
if (m_prefetched)
{
msg_ = m_prefetchedMsg;
m_prefetched = false;
m_prefetchedMsg = null;
return(true);
}
// DEALER socket doesn't use identities. We can safely drop it and
while (true)
{
bool isMessageAvailable = m_fq.Recv(out msg_);
if (!isMessageAvailable)
{
return(false);
}
else if (msg_ == null)
{
return(true);
}
if ((msg_.Flags & MsgFlags.Identity) == 0)
{
break;
}
}
return(true);
}
protected bool XRecv(SendReceiveOptions flags, out Msg msg)
{
return(m_fq.Recv(out msg));
}
override protected bool XRecv(SendReceiveOptions flags, ref Msg msg)
{
return(m_fq.Recv(ref msg));
}