private unsafe IAsyncResult BeginWaitForConnection(AsyncCallback callback, Object state)
{
CheckConnectOperationsServerWithHandle();
if (!IsAsync)
{
throw new InvalidOperationException(SR.InvalidOperation_PipeNotAsync);
}
// Create and store async stream class library specific data in the
// async result
PipeAsyncResult asyncResult = new PipeAsyncResult();
asyncResult._threadPoolBinding = _threadPoolBinding;
asyncResult._userCallback = callback;
asyncResult._userStateObject = state;
IOCancellationHelper cancellationHelper = state as IOCancellationHelper;
// Create wait handle and store in async result
ManualResetEvent waitHandle = new ManualResetEvent(false);
asyncResult._waitHandle = waitHandle;
NativeOverlapped *intOverlapped = _threadPoolBinding.AllocateNativeOverlapped((errorCode, numBytes, pOverlapped) =>
{
// Unpack overlapped, free the pinned overlapped, and complete the operation
PipeAsyncResult ar = (PipeAsyncResult)ThreadPoolBoundHandle.GetNativeOverlappedState(pOverlapped);
Debug.Assert(ar._overlapped == pOverlapped);
ar._threadPoolBinding.FreeNativeOverlapped(pOverlapped);
ar._overlapped = null;
AsyncWaitForConnectionCallback(errorCode, numBytes, ar);
}, asyncResult, null);
asyncResult._overlapped = intOverlapped;
if (!Interop.mincore.ConnectNamedPipe(InternalHandle, intOverlapped))
{
int errorCode = Marshal.GetLastWin32Error();
if (errorCode == Interop.mincore.Errors.ERROR_IO_PENDING)
{
if (cancellationHelper != null)
{
cancellationHelper.AllowCancellation(InternalHandle, intOverlapped);
}
return(asyncResult);
}
// WaitForConnectionCallback will not be called because we completed synchronously.
// Either the pipe is already connected, or there was an error. Unpin and free the overlapped again.
_threadPoolBinding.FreeNativeOverlapped(intOverlapped);
asyncResult._overlapped = null;
// Did the client already connect to us?
if (errorCode == Interop.mincore.Errors.ERROR_PIPE_CONNECTED)
{
if (State == PipeState.Connected)
{
throw new InvalidOperationException(SR.InvalidOperation_PipeAlreadyConnected);
}
asyncResult.CallUserCallback();
return(asyncResult);
}
throw Win32Marshal.GetExceptionForWin32Error(errorCode);
}
// will set state to Connected when EndWait is called
if (cancellationHelper != null)
{
cancellationHelper.AllowCancellation(InternalHandle, intOverlapped);
}
return(asyncResult);
}
private unsafe IAsyncResult BeginWaitForConnection(AsyncCallback callback, Object state)
{
CheckConnectOperationsServerWithHandle();
if (!IsAsync)
{
throw new InvalidOperationException(SR.InvalidOperation_PipeNotAsync);
}
// Create and store async stream class library specific data in the
// async result
PipeAsyncResult asyncResult = new PipeAsyncResult();
asyncResult._handle = InternalHandle;
asyncResult._userCallback = callback;
asyncResult._userStateObject = state;
IOCancellationHelper cancellationHelper = state as IOCancellationHelper;
// Create wait handle and store in async result
ManualResetEvent waitHandle = new ManualResetEvent(false);
asyncResult._waitHandle = waitHandle;
// Create a managed overlapped class
// We will set the file offsets later
Overlapped overlapped = new Overlapped();
overlapped.OffsetLow = 0;
overlapped.OffsetHigh = 0;
overlapped.AsyncResult = asyncResult;
// Pack the Overlapped class, and store it in the async result
NativeOverlapped *intOverlapped = overlapped.Pack(s_WaitForConnectionCallback, null);
asyncResult._overlapped = intOverlapped;
if (!Interop.mincore.ConnectNamedPipe(InternalHandle, intOverlapped))
{
int errorCode = Marshal.GetLastWin32Error();
if (errorCode == Interop.ERROR_IO_PENDING)
{
if (cancellationHelper != null)
{
cancellationHelper.AllowCancellation(InternalHandle, intOverlapped);
}
return(asyncResult);
}
// WaitForConnectionCallback will not be called because we completed synchronously.
// Either the pipe is already connected, or there was an error. Unpin and free the overlapped again.
Overlapped.Free(intOverlapped);
asyncResult._overlapped = null;
// Did the client already connect to us?
if (errorCode == Interop.ERROR_PIPE_CONNECTED)
{
if (State == PipeState.Connected)
{
throw new InvalidOperationException(SR.InvalidOperation_PipeAlreadyConnected);
}
asyncResult.CallUserCallback();
return(asyncResult);
}
throw Win32Marshal.GetExceptionForWin32Error(errorCode);
}
// will set state to Connected when EndWait is called
if (cancellationHelper != null)
{
cancellationHelper.AllowCancellation(InternalHandle, intOverlapped);
}
return(asyncResult);
}