public async Task <byte[]> WaitAsync(int count, WaitMode mode, AsyncOperationInfo operationInfo)
{
throwIfDisposed();
_responseReadTimeout.ThrowIfTimeout();
operationInfo.CancellationToken.ThrowIfCancellationRequested();
byte[] waitResult = null;
try
{
using (_waitTimeout.RestartMode)
{
switch (mode)
{
case WaitMode.EXACT:
var buffer = new List <byte>(count);
while (buffer.Count != count)
{
_responseReadTimeout.ThrowIfTimeout();
var result = await _pipe.ReadAsync(new PipeReadParameters(count - buffer.Count), _cancellation);
if (result.Status.IsOneOf(IOBase.ReadStatus.DONE, IOBase.ReadStatus.PATIALLY_DONE))
{
buffer.AddRange(result.Data);
}
else
{
throw new NotSupportedException();
}
}
waitResult = buffer.ToArray();
break;
case WaitMode.NO_MORE_THAN:
{
var result = await _pipe.ReadAsync(new PipeReadParameters(count), _cancellation);
if (result.Status.IsOneOf(IOBase.ReadStatus.DONE, IOBase.ReadStatus.PATIALLY_DONE))
{
waitResult = result.Data.ToArray();
}
else
{
throw new NotSupportedException();
}
}
break;
default:
throw new NotSupportedException();
}
}
return(waitResult);
}
finally
{
await Logger.LogResponseAsync(waitResult ?? new byte[0], count);
}
}
static async Task <byte[]> readExactAsync
(int count, Func <byte[], int, int, object> readFunc, ReadExactInfo info)
{
var timeouter = new Timeouter(info.MethodTimeout);
var buffer = new byte[count];
var offset = 0;
var totalBytesRead = 0;
var remain = count;
while (totalBytesRead != count)
{
var bytesRead = 0;
var readInfo = readFunc(buffer, offset, remain);
if (readInfo is Task <int> task)
{
bytesRead = await task;
}
else if (readInfo is int read)
{
bytesRead = read;
}
else
{
throw new NotSupportedException();
}
totalBytesRead += bytesRead;
offset = totalBytesRead;
remain = count - totalBytesRead;
if (bytesRead == 0 && info.ThrowIfZeroReceived)
{
throw new ReadExactZeroReceivedException();
}
if (info.RetryDelay != 0)
{
await Task.Delay(info.RetryDelay).ConfigureAwait(false);
}
if ((info.TimeoutOnlyIfNothingWasRead && totalBytesRead == 0) ||
(!info.TimeoutOnlyIfNothingWasRead))
{
timeouter.ThrowIfTimeout(() => new ReadExactTimeoutException(buffer.Take(totalBytesRead), count));
}
}
return(buffer);
}
protected override async Task <IResponse> deserializeResponseAsync(IResponseFuture inputStream, AsyncOperationInfo operationInfo)
{
IResponse result = null;
Stream stream = createReadBuffer();
var dataRead = new StreamResponseData(stream);
switch (_responseInfo.ReadMode)
{
case ResponseReadMode.TILL_TIMEOUT:
try
{
var readTimeout = new Timeouter(CHUNK_READ_TIMEOUT);
while (true)
{
var piece = await inputStream.WaitAsync(READ_CHUNK_SIZE, WaitMode.NO_MORE_THAN, operationInfo);
await stream.WriteAsync(piece, 0, piece.Length);
operationInfo.Progress.AddProgress(piece.Length);
if (piece.Length != 0)
{
readTimeout.Restart();
}
readTimeout.ThrowIfTimeout();
}
}
catch (TimeoutException)
{
}
break;
case ResponseReadMode.CONSTRAINED_BY_ANSWER:
var max = _responseInfo.ResponseFullLength.IsUnknown
? long.MaxValue
: _responseInfo.ResponseFullLength.Length;
for (long i = 0; i < max; i++)
{
var data = await inputStream.WaitAsync(1, WaitMode.EXACT, operationInfo);
stream.WriteByte(data.Single());
operationInfo.Progress.AddProgress(1D / max);
}
break;
case ResponseReadMode.READ_BY_TARGET:
result = await _deviceRequest.DeserializeResponseAsync(inputStream, operationInfo);
break;
default:
throw new NotSupportedException();
}
if (result == null)
{
if (!_responseInfo.ResponseFullLength.IsUnknown &&
_responseInfo.ExpectedAnswer != null &&
!stream.AsEnumerable().Take((int)_responseInfo.ResponseFullLength.Length).SequenceEqual(_responseInfo.ExpectedAnswer))
{
result = new FTDIBoxResponse(this, RequestStatus.NOT_EXPECTED_RESPONSE_BYTES, dataRead, null, null);
}
else
{
await stream.FlushAsync(operationInfo.CancellationToken);
IResponseData serviceSection = null;
IResponseData bodySection = null;
switch (Address)
{
case FTDIBoxRequestAddress.HS_SET_LOW_SPEED_MODE:
case FTDIBoxRequestAddress.LS_SET_HIGH_SPEED_MODE:
case FTDIBoxRequestAddress.HS_ACTIVATE_CHANNEL4:
case FTDIBoxRequestAddress.LS_ACTIVATE_CHANNEL4:
break;
case FTDIBoxRequestAddress.HS_GET_FLASH_LENGTH:
case FTDIBoxRequestAddress.HS_READ_ALL_FLASH:
serviceSection = new ResponseDataAreaProxy(dataRead, dataRead.Count - 6, dataRead.Count);
bodySection = new ResponseDataAreaProxy(dataRead, 0, dataRead.Count - 6);
break;
case FTDIBoxRequestAddress.LS_DEVICE_REQUEST:
bodySection = dataRead;
break;
default:
throw new NotSupportedException();
}
result = new FTDIBoxResponse(this, RequestStatus.OK, dataRead, serviceSection, bodySection);
}
}
return(result);
Stream createReadBuffer()
{
Stream buffer = new MemoryStream();
if (Address == FTDIBoxRequestAddress.HS_READ_ALL_FLASH)
{
buffer = _scope.TryGetFirstParameter <FlashDumpStreamParameter>()?.Stream;
if (buffer == null)
{
var path = Path.GetTempFileName();
buffer = File.Open(path, FileMode.Open, FileAccess.ReadWrite, FileShare.Read);
Logger.LogInfo(null, $"Создан буфер чтения по пути {path}");
}
else
{
Logger.LogInfo(null, $"Буфер чтения предоставлен через параметр");
}
}
return(buffer);
}
}
