Question

Hello
At my form I create TFrame at runtime. At this frame I create background thread with executes commands in endless loop. But when I destroy this frame I should destroy this thread.
I try

thread.Suspend;
thread.Terminate;
FreeAndNil(thread);

but get AV and ThreadError.
How should i destroy thread?

Answer 1

You must make sure that the thread exits its Execute method to terminate it properly.

Code could be something like this:

procedure TThread.Execute;
begin
  while not Self.Terminated do
  begin
    //do something
  end;
end;

Call this when You want to destroy thread:

thread.Terminate;
thread.WaitFor;
FreeAndNil(thread);