freeing an object in different process

[Attila Kovacs 631]

is it ok regarding to multithread design pattern to free an object in a different process thread as it was created in?

 

Seems to work, but are there any caveats?

function TfrmSync.NewCookieList: TclCookieList;
begin
  Result := TclCookieList.Create(nil, TclCookieItem);
  Result.Assign(FCookies);
end;

mainthread
begin
  ...
  Fpipeline := Parallel.pipeline.Stage(Retriever, ....)...Run;
  Fpipeline.input.Add(TRetrieverParam.Create(..., NewCookieList));  <---- New instance
  ...
  Fpipeline.input.CompleteAdding;
end;

procedure TfrmSync.Retriever(const input: TOmniValue; var output: TOmniValue);
begin
.....
TRetrieverParam(input).CookieList.Free;   <---- EOL
end;

 

Edited April 10, 2020 by Attila Kovacs

[Dalija Prasnikar 1404]

No caveats for above code. You can freely Free object instance from different thread than one where it is created.  

 

Problem would arise if you would have object instance that is being simultaneously accessed by multiple threads.

[Fr0sT.Brutal 900]

I guess you didn't really meant process

[Attila Kovacs 631]

@Fr0sT.Brutal eauhm, yes, thread of course.... thanks!