private void SendCallback(IAsyncResult ar)
{
SendState state = (SendState)ar.AsyncState;
try {
int len = state.SendSocket.EndSend(ar);
if (len != state.SendParameters.Length)
{
//I don't know how this can happen, but just in case..
Debug.Assert(false, "Critical error: Server did not send the expected number of bytes. Buffer length = " + state.SendParameters.Length.ToString() +
"; bytes sent = " + len.ToString() + "; remote endpoint = " + state.SendSocket.RemoteEndPoint.ToString());
}
}
catch (SocketException se) {
Trace.WriteLine("SendCallback SocketException errorcode: " + se.ErrorCode.ToString(), this.GetType().ToString());
this.DisableClient(state.SendParameters.Id);
}
catch (ObjectDisposedException ode) {
Trace.WriteLine("SendCallback: " + ode.Message, this.GetType().ToString());
this.DisableClient(state.SendParameters.Id);
}
catch (Exception e) {
Trace.WriteLine(e.ToString(), this.GetType().ToString());
this.DisableClient(state.SendParameters.Id);
}
finally {
using (Synchronizer.Cookie cookie = Synchronizer.Lock(this.m_SendQueue)) {
using (Synchronizer.Lock(m_SendingParticipants)) {
if (m_SendingParticipants.ContainsKey(state.SendParameters.Id))
{
((ReferenceCounter)m_SendingParticipants[state.SendParameters.Id]).Decrement();
}
else
{
Debug.Assert(false, "Server send callback found a missing reference counter.");
}
--m_PendingOutboundMessageCount;
Debug.Assert(m_PendingOutboundMessageCount >= 0, "Server send callback found a negative pending message count.");
//Notify threads closing the socket if this is the last item in the socket queue.
if (m_ClosingSockets.ContainsKey(state.SendSocket))
{
if (((ReferenceCounter)m_SendingParticipants[state.SendParameters.Id]).IsZero)
{
((ManualResetEvent)m_ClosingSockets[state.SendSocket]).Set();
}
}
// Notify the sender thread that the queue's status has changed.
cookie.PulseAll();
}
}
}
}
/// <summary>
/// If a client reconnects, update the socket map and enable the client's queue
/// </summary>
/// <param name="id"></param>
/// <param name="s"></param>
internal void Reconnect(ClientData client, ulong lastMessage, ulong lastChunk)
{
using (Synchronizer.Lock(this.m_SocketMap)) {
if (m_SocketMap.ContainsKey(client.Id))
{
m_SocketMap[client.Id] = client.Socket;
}
}
using (Synchronizer.Cookie cookie = Synchronizer.Lock(this.m_SendQueue)) {
m_SendQueue.EnableClient(client, lastMessage, lastChunk);
cookie.PulseAll();
}
}
protected virtual void Dispose(bool disposing)
{
this.m_Disposed = true;
if (disposing)
{
m_Instructor.Changed["CurrentDeckTraversal"].Remove(new PropertyEventHandler(OnCurrentDeckTraversalChanged));
if (m_DeckTraversal != null)
{
m_DeckTraversal.Changed["Current"].Remove(new PropertyEventHandler(OnTableOfContentsEntryChanged));
}
// Notify the sending thread that we're disposed.
using (Synchronizer.Cookie cookie = Synchronizer.Lock(this.m_SendQueue))
cookie.PulseAll();
}
}
/// <summary>
/// Enqueue the send to occur when network bandwidth is available.
/// </summary>
/// <param name="buffer"></param>
/// <param name="length"></param>
/// <param name="socket"></param>
/// <param name="participant"></param>
internal void Send(byte[] buffer, int length, ClientData client, MessageTags tags,
ulong messageSequence, ulong chunkSequence, bool isHeartbeat)
{
using (Synchronizer.Lock(m_SocketMap)) {
Debug.Assert(m_SocketMap.ContainsKey(client.Id), "TCPServerSender.Send found a missing Socket Map entry.");
}
//Trace.WriteLine("TCPServerSender.Send seq=" + messageSequence.ToString());
//Enqueue the message
using (Synchronizer.Cookie cookie = Synchronizer.Lock(m_SendQueue)) {
m_SendQueue.Enqueue(new SendParameters(buffer, length, client.Id, tags, messageSequence, chunkSequence, isHeartbeat),
client.Participant);
// Notify the sender thread that the queue's status has changed.
cookie.PulseAll();
}
}