public ReturnCode DeleteDataReader(IDataReader dataReader)
{
DataReader drObj = dataReader as DataReader;
ReturnCode result = DDS.ReturnCode.AlreadyDeleted;
ReportStack.Start();
lock (this)
{
if (this.rlReq_isAlive)
{
if (drObj != null)
{
if (readerList.Remove(drObj))
{
result = drObj.deinit();
if (result != ReturnCode.Ok)
{
readerList.Add(drObj);
}
}
else
{
/* The DataReader can be AlreadyDeleted, or it can be from another
* Subscriber. Its liveliness cannot be modified without the lock
* of its factory, so we are safe checking it here since we hold
* the lock to this factory. If the DataReader is from another
* Subscriber, then the result may be PRECONDITION_NOT_MET while
* it should have been BAD_PARAMETER, but such a Use Case has
* an inherent race-condition anyway, and the result of such
* a test is by definition undefined.
*/
if (drObj.rlReq_isAlive)
{
result = ReturnCode.PreconditionNotMet;
ReportStack.Report(result, "DataReader " + drObj + " unknown to Subscriber " + this + ".");
}
else
{
// ALREADY_DELETED may only apply to the Subscriber in this context,
// so for a deleted datareader use BAD_PARAMETER instead.
result = DDS.ReturnCode.BadParameter;
ReportStack.Report(result, "DataReader " + drObj + " was already deleted.");
}
}
}
else
{
result = ReturnCode.BadParameter;
ReportStack.Report(result, "datareader is invalid (null), or not of type " +
"DDS::OpenSplice::DataReader.");
}
}
}
ReportStack.Flush(this, result != ReturnCode.Ok);
return(result);
}