multithreading - 为什么要设置线程的Terminal属性？

Question

我有多线程应用程序。

procedure TGridUpdater.Execute;
begin
  inherited;
  CodeSite.Send('Thread executed');
  sp := ConnectionFactory.GetConnection.LoadStoredProc('rab_itemData');
  sp.CreateParam('Tahun', ftInteger, sppdInput).Value := _form.tahun;
  sp.Open;
  Synchronize(DoProgress1);
  sp.DataSet.First;
  I := 0;
  CodeSite.Send('Terminated value is ' + BoolToStr(Terminated)); //The terminated property is 'True' here. Why?

  while (not Terminated) and (not sp.DataSet.Eof) do
  begin
    CodeSite.Send('Entering loop');
    Synchronize(DoProgress);
    I := I + 1;
    sp.DataSet.Next;
  end;
  Synchronize(DoProgress2);

end;

运行线程的方法

procedure TFRABData.RefreshDataset;
var
  GridUpdater: TGridUpdater;
begin
  GridUpdater := TGridUpdater.Create(True);
  GridUpdater.OwnerForm := Self;
  GridUpdater.Start;
  CodeSite.Send('RefreshDataset executed');
  GridUpdater.Free;
end;

Answer 1

您在启动线程后立即释放它。你必须让它过自己的生活。因此，为了回答您的问题，线程的析构函数设置了 Terminated标记为 True。

procedure TFRABData.RefreshDataset;
var
  GridUpdater: TGridUpdater;
begin
  GridUpdater := TGridUpdater.Create(True);
  GridUpdater.OwnerForm := Self;
  GridUpdater.Start;
  CodeSite.Send('RefreshDataset executed');
  GridUpdater.Free; // <-- don't do this; let the thread live its own life
end;