private void asyncReadAllReadCallback(IAsyncResult ar)
{
AsyncResult myar = (AsyncResult)ar.AsyncState;
try {
int len = baseStream.EndRead(ar);
if (len <= 0)
{
throw new EndOfStreamException();
}
myar.Offset += len;
myar.Left -= len;
myar.Count += len;
if (myar.Left > 0)
{
baseStream.BeginRead(myar.Buffer, myar.Offset, myar.Left, asyncReadAllReadCallback, ar);
}
else
{
myar.SetCompleted(false, myar.Count, null);
}
} catch (Exception ex) {
myar.SetCompleted(false, ex);
}
}
private void asyncPrebufferReadCallback(IAsyncResult ar)
{
AsyncResult myar = (AsyncResult)ar.AsyncState;
try {
int len = baseStream.EndRead(ar);
if (len <= 0)
{
myar.SetCompleted(false, prebuffercount, null);
}
else
{
myar.Left -= len;
prebuffercount += len;
if (myar.Left > 0)
{
int off = prebufferoffset + prebuffercount;
baseStream.BeginRead(prebuffer, off, prebuffer.Length - off, asyncPrebufferReadCallback, myar);
}
else
{
myar.SetCompleted(false, prebuffercount, null);
}
}
} catch (Exception ex) {
myar.SetCompleted(false, prebuffercount, ex);
}
}
private IAsyncResult BeginAsyncReadOperation(AsyncResult ar)
{
Boolean synccompleted = false;
lock (ReceiveQueue) {
if (AsyncReceiveOperation != null)
{
throw new InvalidOperationException("Another asynchronous operation is in progress");
}
if (ReceiveBuffer != null || ReceiveQueue.Count > 0)
{
synccompleted = true;
}
else
{
if (Closed)
{
throw new ObjectDisposedException("QueuedPacketStream", "The connection has been closed");
}
AsyncReceiveOperation = ar;
}
}
if (synccompleted)
{
ar.SetCompleted(true);
}
return(ar);
}
public IAsyncResult BeginReadAll(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
{
AsyncResult ar = new AsyncResult(callback, state);
ar.Buffer = buffer;
ar.Offset = 0;
ar.Left = count;
ar.Count = 0;
if (prebuffercount > 0)
{
int read = Math.Min(ar.Left, prebuffercount);
Buffer.BlockCopy(prebuffer, prebufferoffset, ar.Buffer, ar.Offset, read);
prebufferoffset += read;
prebuffercount -= read;
ar.Offset += read;
ar.Left -= read;
ar.Count += read;
}
if (ar.Left > 0)
{
baseStream.BeginRead(ar.Buffer, ar.Offset, ar.Left, asyncReadAllReadCallback, ar);
}
else
{
ar.SetCompleted(true, count, null);
}
return(ar);
}
public static AsyncResult CreateCompleted(Exception ex)
{
AsyncResult ar = new AsyncResult();
ar.SetCompleted(true, ex);
return(ar);
}
public static AsyncResult CreateCompleted()
{
AsyncResult ar = new AsyncResult();
ar.SetCompleted(true, null);
return(ar);
}
protected void AddReadBufferNoCopy(Byte[] store)
{
if (Closed)
{
return;
}
lock (ReceiveQueue) {
ReceiveQueue.Enqueue(store);
Interlocked.Add(ref ReceiveWaiting, store.Length);
if (AsyncReceiveOperation != null && (store.Length > 0 || AsyncReceiveOperation.IsReadPacket))
{
AsyncReceiveOperation.SetCompleted(false);
AsyncReceiveOperation = null;
}
else
{
Monitor.Pulse(ReceiveQueue);
}
}
}
public IAsyncResult BeginPrebuffering(int count, AsyncCallback callback, Object state)
{
AsyncResult ar = new AsyncResult(callback, state);
if (prebuffercount >= count)
{
ar.SetCompleted(true, prebuffercount, null);
}
else
{
PrepareBuffer(count);
ar.Left = count - prebuffercount;
int off = prebufferoffset + prebuffercount;
baseStream.BeginRead(prebuffer, off, prebuffer.Length - off, asyncPrebufferReadCallback, ar);
}
return(ar);
}
public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
{
if (prebuffercount > 0)
{
if (count > prebuffercount)
{
count = prebuffercount;
}
Buffer.BlockCopy(prebuffer, prebufferoffset, buffer, offset, count);
prebufferoffset += count;
prebuffercount -= count;
AsyncResult ar = new AsyncResult(callback, state);
ar.SetCompleted(true, count, null);
return(ar);
}
else
{
return(baseStream.BeginRead(buffer, offset, count, callback, state));
}
}
