public AsyncCompletionResult BeginRead(int offset, int size, TimeSpan timeout, Action <object> callback, object state) { ConnectionUtilities.ValidateBufferBounds(AsyncReadBufferSize, offset, size); readCallback = callback; try { SetReadTimeout(timeout); Task <int> localTask = stream.ReadAsync(AsyncReadBuffer, offset, size); if (!localTask.IsCompleted) { localTask.ContinueWith(onRead, state); return(AsyncCompletionResult.Queued); } bytesRead = localTask.GetAwaiter().GetResult(); } catch (IOException ioException) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(ConvertIOException(ioException)); } return(AsyncCompletionResult.Completed); }
public override int Read(byte[] buffer, int offset, int size, TimeSpan timeout) { ConnectionUtilities.ValidateBufferBounds(buffer, offset, size); if (preReadCount > 0) { int bytesToCopy = Math.Min(size, preReadCount); Buffer.BlockCopy(base.Connection.AsyncReadBuffer, preReadOffset, buffer, offset, bytesToCopy); preReadOffset += bytesToCopy; preReadCount -= bytesToCopy; return(bytesToCopy); } return(base.Read(buffer, offset, size, timeout)); }
public override AsyncCompletionResult BeginRead(int offset, int size, TimeSpan timeout, Action <object> callback, object state) { ConnectionUtilities.ValidateBufferBounds(AsyncReadBufferSize, offset, size); if (preReadCount > 0) { int bytesToCopy = Math.Min(size, preReadCount); if (preReadData == null) { if (offset != preReadOffset) { preReadData = Fx.AllocateByteArray(preReadCount); Buffer.BlockCopy(base.Connection.AsyncReadBuffer, preReadOffset, preReadData, 0, preReadCount); preReadOffset = 0; Buffer.BlockCopy(preReadData, 0, base.Connection.AsyncReadBuffer, offset, bytesToCopy); preReadOffset += bytesToCopy; preReadCount -= bytesToCopy; asyncBytesRead = bytesToCopy; return(AsyncCompletionResult.Completed); } // Requested offset and preReadOffset are the same so no copy needed preReadOffset += bytesToCopy; preReadCount -= bytesToCopy; asyncBytesRead = bytesToCopy; return(AsyncCompletionResult.Completed); } Buffer.BlockCopy(preReadData, preReadOffset, AsyncReadBuffer, offset, bytesToCopy); preReadOffset += bytesToCopy; preReadCount -= bytesToCopy; asyncBytesRead = bytesToCopy; return(AsyncCompletionResult.Completed); } return(base.BeginRead(offset, size, timeout, callback, state)); }