Search code examples
multithreadingdelphidestroy

Correct thread destroy

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?

Solution

  • 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);