public override void Cancel()
{
unchecked
{ _changeID++; }
UnsafeNativeMethods.ICommandText icmdtxt = _icommandText;
if (null != icmdtxt)
{
OleDbHResult hr = OleDbHResult.S_OK;
lock (icmdtxt)
{
// lock the object to avoid race conditions between using the object and releasing the object
// after we acquire the lock, if the class has moved on don't actually call Cancel
if (icmdtxt == _icommandText)
{
hr = icmdtxt.Cancel();
}
}
if (OleDbHResult.DB_E_CANTCANCEL != hr)
{
// if the provider can't cancel the command - don't cancel the DataReader
this.canceling = true;
}
// since cancel is allowed to occur at anytime we can't check the connection status
// since if it returns as closed then the connection will close causing the reader to close
// and that would introduce the possilbility of one thread reading and one thread closing at the same time
ProcessResultsNoReset(hr);
}
else
{
this.canceling = true;
}
}
public override void Cancel()
{
IntPtr ptr;
Bid.ScopeEnter(out ptr, "<oledb.OleDbCommand.Cancel|API> %d#\n", this.ObjectID);
try
{
this._changeID++;
UnsafeNativeMethods.ICommandText text = this._icommandText;
if (text != null)
{
OleDbHResult result = OleDbHResult.S_OK;
lock (text)
{
if (text == this._icommandText)
{
Bid.Trace("<oledb.ICommandText.Cancel|API|OLEDB> %d#\n", this.ObjectID);
result = text.Cancel();
Bid.Trace("<oledb.ICommandText.Cancel|API|OLEDB|RET> %08X{HRESULT}\n", result);
}
}
if (OleDbHResult.DB_E_CANTCANCEL != result)
{
this.canceling = true;
}
this.ProcessResultsNoReset(result);
}
else
{
this.canceling = true;
}
}
finally
{
Bid.ScopeLeave(ref ptr);
}
}