private static void OnSyncCompletion(object state)
{
PipeOverlappedAsyncResult asyncResult = (PipeOverlappedAsyncResult)state;
// invoke client callback
asyncResult.AsyncCallback(asyncResult);
}
/// <summary>
/// Completes send operation
/// </summary>
public void EndSend(IAsyncResult result)
{
// parameters validation
if (result == null)
{
throw new ArgumentNullException("result");
}
// get async result
PipeOverlappedAsyncResult asyncResult = (result as PipeOverlappedAsyncResult);
if (asyncResult == null)
{
throw new ArgumentException("result");
}
// wait for completion
int error = asyncResult.WaitForCompletion();
if (error != Win32.ERROR_SUCCESS)
{
// error occured
throw new PipeIOException(error, "Could not write data to the pipe: " + _instance.Name);
}
}
/// <summary>
/// Completes receive operation
/// </summary>
public int EndReceive(IAsyncResult result)
{
// parameters validation
if (result == null)
{
throw new ArgumentNullException("result");
}
// get async result
PipeOverlappedAsyncResult asyncResult = (result as PipeOverlappedAsyncResult);
if (asyncResult == null)
{
throw new ArgumentException("result");
}
// wait for completion
int error = asyncResult.WaitForCompletion();
if (error != Win32.ERROR_SUCCESS)
{
// error occured
throw new PipeIOException(error, "Could not read data from the pipe: " + _instance.Name);
}
return(asyncResult.TotalBytes);
}
/// <summary>
/// Initiates send operation
/// </summary>
public IAsyncResult BeginSend(byte[] buffer, int offset, int size, AsyncCallback callback, object state)
{
// check object state
if (_disposed)
{
throw new ObjectDisposedException(GetType().FullName);
}
if (_instance == null)
{
throw new InvalidOperationException("Pipe is not connected");
}
// parameters validation
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (offset < 0 || offset > buffer.Length)
{
throw new ArgumentOutOfRangeException("offset");
}
if (size < 0 || size > buffer.Length - offset)
{
throw new ArgumentOutOfRangeException("size");
}
// write data to the pipe
GCHandle gcBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned);
PipeOverlappedAsyncResult asyncResult = new PipeOverlappedAsyncResult(gcBuffer, callback, state);
int error = asyncResult.CheckForCompletion(PipeNative.WriteFile(
_instance.Handle,
Marshal.UnsafeAddrOfPinnedArrayElement(buffer, offset),
size,
IntPtr.Zero,
asyncResult.OverlappedHandle));
switch (error)
{
case Win32.ERROR_SUCCESS:
// operation completed synchronously
break;
case PipeNative.ERROR_IO_PENDING:
// async operation was pended
break;
default:
// error occured
asyncResult.Dispose();
throw new PipeIOException(error, "Could not write data to the pipe: " + _instance.Name);
}
return(asyncResult);
}
private static void OnAsyncCompletion(object state, bool signaled)
{
PipeOverlappedAsyncResult asyncResult = (PipeOverlappedAsyncResult)state;
asyncResult.SetCompleted(false);
if (asyncResult.AsyncCallback != null)
{
// invoke client callback
asyncResult.AsyncCallback(asyncResult);
}
}
public void WaitForClientConnection()
{
// check object state
if (_isConnected)
{
throw new InvalidOperationException("Pipe is already connected");
}
// connect to the client
PipeOverlappedAsyncResult asyncResult = new PipeOverlappedAsyncResult();
int error = asyncResult.CheckForCompletion(PipeNative.ConnectNamedPipe(
_handle,
asyncResult.OverlappedHandle));
switch (error)
{
case Win32.ERROR_SUCCESS:
// operation completed synchronously
break;
case PipeNative.ERROR_PIPE_CONNECTED:
// client already connected
break;
case PipeNative.ERROR_IO_PENDING:
// async operation was pended
asyncResult.WaitForCompletion();
break;
default:
// error occured
throw new PipeIOException(error, "Unable to connect client to the pipe: " + _pipeName);
}
_isConnected = true;
}
/// <summary>
/// Initiates send operation
/// </summary>
public IAsyncResult BeginSend(byte[] buffer, int offset, int size, AsyncCallback callback, object state)
{
// check object state
if (_disposed)
throw new ObjectDisposedException(GetType().FullName);
if (_instance == null)
throw new InvalidOperationException("Pipe is not connected");
// parameters validation
if (buffer == null)
throw new ArgumentNullException("buffer");
if (offset < 0 || offset > buffer.Length)
throw new ArgumentOutOfRangeException("offset");
if (size < 0 || size > buffer.Length - offset)
throw new ArgumentOutOfRangeException("size");
// write data to the pipe
GCHandle gcBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned);
PipeOverlappedAsyncResult asyncResult = new PipeOverlappedAsyncResult(gcBuffer, callback, state);
int error = asyncResult.CheckForCompletion(PipeNative.WriteFile(
_instance.Handle,
Marshal.UnsafeAddrOfPinnedArrayElement(buffer, offset),
size,
IntPtr.Zero,
asyncResult.OverlappedHandle));
switch (error)
{
case Win32.ERROR_SUCCESS:
// operation completed synchronously
break;
case PipeNative.ERROR_IO_PENDING:
// async operation was pended
break;
default:
// error occured
asyncResult.Dispose();
throw new PipeIOException(error, "Could not write data to the pipe: " + _instance.Name);
}
return asyncResult;
}
public void WaitForClientConnection()
{
// check object state
if (_isConnected)
throw new InvalidOperationException("Pipe is already connected");
// connect to the client
PipeOverlappedAsyncResult asyncResult = new PipeOverlappedAsyncResult();
int error = asyncResult.CheckForCompletion(PipeNative.ConnectNamedPipe(
_handle,
asyncResult.OverlappedHandle));
switch (error)
{
case Win32.ERROR_SUCCESS:
// operation completed synchronously
break;
case PipeNative.ERROR_PIPE_CONNECTED:
// client already connected
break;
case PipeNative.ERROR_IO_PENDING:
// async operation was pended
asyncResult.WaitForCompletion();
break;
default:
// error occured
throw new PipeIOException(error, "Unable to connect client to the pipe: " + _pipeName);
}
_isConnected = true;
}
