/// <summary>
/// Initiates receive operation
/// </summary>
public IAsyncResult BeginReceive(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");
}
// read data from the pipe
GCHandle gcBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned);
PipeOverlappedAsyncResult asyncResult = new PipeOverlappedAsyncResult(gcBuffer, callback, state);
int error = asyncResult.CheckForCompletion(PipeNative.ReadFile(
_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 read data from the pipe: " + _instance.Name);
}
return(asyncResult);
}
/// <summary>
/// Receives data from the pipe
/// </summary>
public int Receive(byte[] buffer, int offset, int size)
{
// 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");
}
// read data from the pipe
GCHandle gcBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned);
int bytesRead;
bool error = PipeNative.ReadFile(
_instance.Handle,
Marshal.UnsafeAddrOfPinnedArrayElement(buffer, offset),
size,
out bytesRead,
IntPtr.Zero);
gcBuffer.Free();
if (!error)
{
// error occured
throw new PipeIOException(Marshal.GetLastWin32Error(), "Could not read data from the pipe: " + _instance.Name);
}
return(bytesRead);
}