How to manage the return value of a thread?

Question

I created a class derived from TThread that executes in background a query.

I want that this class is decoupled from the client.

This kind of th

Answer 1

Using OmniThreadLibrary:

uses OtlFutures;

var
  thread: IOmniFuture;

thread := TOmniFuture.Create(
  function: integer;
  begin
    Result := YourFunction;
  end;
);
// do something else
threadRes := thread.Value; //will block if thread is not yet done

Creating the TOmniFuture object will automatically start background thread executing your code. Later you can wait on result by calling .Value or you can use .TryValue or .IsDone to check if the thread has already completed its work.