private Task <T> ReadNCAsync <T>(int?timeout = null)
{
using (ObtainLock())
{
int DefaultTimeout = 2000;
if (timeout != null)
{
#if VISACOM
DefaultTimeout = session.Timeout;
session.Timeout = timeout.Value;
#else
DefaultTimeout = Session.TimeoutMilliseconds;
Session.TimeoutMilliseconds = timeout.Value;
#endif
}
#if VISACOM
// Do things synchronously
return(Task.FromResult(ReadNC <T>(session)));
#else
var task = new TaskCompletionSource <T>();
Session.RawIO.BeginRead(1000, res =>
{
if (res.IsCompleted)
{
if (res.Count == 0)
{
//throw new Exception(string.Format("Asynchronous operation {0} timed out.", nameof(ReadNCAsync)));
Exception ex = new TimeoutException(string.Format("Asynchronous operation {0} timed out.", nameof(ReadNCAsync)));
task.SetException(ex);
//task.SetCanceled();
}
else
{
string str = System.Text.Encoding.Default.GetString(res.Buffer, 0, (int)res.Count);
TypeConverter typeConverter = TypeDescriptor.GetConverter(typeof(T));
LogCommandReceived(str);
task.SetResult(ScpiResponseConverter.ConvertFromString <T>(str));
}
}
else
{
var Exception = new OperationCanceledException(string.Format("Asynchronous operation {0} not completed.", nameof(ReadNCAsync)));
task.SetException(Exception);
}
Session.RawIO.EndRead(res);
// Restore timeout
if (timeout != null)
{
Session.TimeoutMilliseconds = DefaultTimeout;
}
}, null);
return(task.Task);
#endif
}
}
private T ReadNC <T>()
{
using (ObtainLock())
{
#if VISACOM
string response = session.ReadString(65546);
#else
string response = Session.FormattedIO.ReadLine();
#endif
// remove trailing termination character if enabled
if (Session.TerminationCharacterEnabled && !string.IsNullOrEmpty(response) && response[response.Length - 1] == Session.TerminationCharacter)
{
response = response.Substring(0, response.Length - 1);
}
LogCommandReceived(response);
return(ScpiResponseConverter.ConvertFromString <T>(response));
}
}
