public virtual void Run(UsbManager usbManager)
{
if (usbManager == null)
{
throw new ArgumentNullException(nameof(usbManager));
}
if (_isDisposed)
{
throw new ObjectDisposedException(nameof(PortManager));
}
// ReSharper disable once RedundantAssignment
bool startRunning = false;
lock (_stateLocker)
{
if (GetCurrentState() != ManagerState.Stopped)
{
throw new InvalidOperationException("Already running.");
}
else
{
_managerState = ManagerState.Running;
startRunning = true;
}
}
// ReSharper disable once ConditionIsAlwaysTrueOrFalse
if (startRunning)
{
try
{
UsbDeviceConnection connection = usbManager.OpenDevice(_port.Driver.Device);
if (connection == null)
{
throw new UsbSerialException("Failed to connect to device.");
}
_portBuffer = new byte[BufferSize];
_port.Open(connection);
_port.SetParameters(BaudRate, DataBits, StopBits, Parity);
_runCancellationSource = new CancellationTokenSource();
CancellationToken runCancellationToken = _runCancellationSource.Token;
runCancellationToken.Register(() =>
Log.Info(nameof(PortManager), "Cancellation Requested"));
Task.Run(() =>
{
Log.Info(nameof(PortManager), "Running ..");
try
{
bool isRunning;
do
{
ManagerState currentState;
lock (_stateLocker)
{
isRunning = ((currentState = GetCurrentState()) == ManagerState.Running);
}
if (isRunning)
{
runCancellationToken.ThrowIfCancellationRequested();
Step();
}
else
{
Log.Info(nameof(PortManager), $"Stopping mState={currentState}");
}
} while (isRunning);
}
catch (OperationCanceledException)
{
throw;
}
catch (Exception e)
{
Log.Warn(nameof(PortManager), $"Task ending due to exception: {e.Message}", e);
ErrorReceived.RaiseEvent(this, new UnhandledExceptionEventArgs(e, false));
}
finally
{
_port.Close();
_portBuffer = null;
lock (_stateLocker)
{
_managerState = ManagerState.Stopped;
Log.Info(nameof(PortManager), "Stopped.");
}
}
}, runCancellationToken);
}
catch (Exception e)
{
lock (_stateLocker)
{
_managerState = ManagerState.Stopped;
Log.Info(nameof(PortManager), "Stopped.");
}
Log.Warn(nameof(PortManager), $"Run ending due to exception: {e.Message}", e);
ErrorReceived.RaiseEvent(this, new UnhandledExceptionEventArgs(e, false));
}
}
}
