private static void AsyncBeginReceive()
{
// this method actually kicks off the async read on the socket.
// we aquire a reader lock here to ensure that no other thread
// is trying to set shutdownFlag and close the socket.
rwLock.AcquireReaderLock(-1);
if (!shutdownFlag)
{
// increment the count of pending operations
Interlocked.Increment(ref rwOperationCount);
// allocate a packet buffer
UDPPacketBuffer buf = new UDPPacketBuffer();
try
{
// kick off an async read
udpSocket.BeginReceiveFrom(
buf.Data,
0,
UDPPacketBuffer.BUFFER_SIZE,
SocketFlags.None,
ref buf.RemoteEndPoint,
new AsyncCallback(AsyncEndReceive),
buf);
}
catch (SocketException se)
{
// Diagnostic.NetworkingDiagnostics.Logging.Error("AsyncBeginReceive", se);
// an error occurred, therefore the operation is void. Decrement the reference count.
Interlocked.Decrement(ref rwOperationCount);
}
catch (Exception ex)
{
// Diagnostic.NetworkingDiagnostics.Logging.Fatal("AsyncBeginReceive", ex);
// an error occurred, therefore the operation is void. Decrement the reference count.
Interlocked.Decrement(ref rwOperationCount);
}
}
// we're done with the socket for now, release the reader lock.
rwLock.ReleaseReaderLock();
}
private static void PacketWasReceived(UDPPacketBuffer buffer)
{
string msg = Encoding.UTF8.GetString(buffer.Data, 0, buffer.DataLength);
if (msg.ToLower() == "q")
{
Close();
Console.WriteLine("Press [ENTER] to quit");
}
Write(msg);
}
