[Vala] Singleton and reference count

[Jonh Wendell <jwendell gnome org>]

Hi, folks. I wrote a simple singleton:

public class Prefs {
  private static Prefs instance;

  public static Prefs default() {
    if (instance == null)
      instance = new Prefs ();

    return instance;
  }

  private Prefs () {
    stdout.printf ("constructor\n");
  }

  ~Prefs () {
    stdout.printf ("destruction\n");
  }
}

And in the other file, I do:

var prefs = Prefs.default ();
.... use prefs var...

The prefs var doesn't get destroyed, thus my destructor is never called.

Looking at C generated code, I see:
GadePrefs* gade_prefs_default (void) {
        GadePrefs* result = NULL;
        if (gade_prefs_instance == NULL) {
                GadePrefs* _tmp0_;
                gade_prefs_instance = (_tmp0_ = gade_prefs_new (), _g_object_unref0
(gade_prefs_instance), _tmp0_);
        }
        result = _g_object_ref0 (gade_prefs_instance);
        return result;
}

It refs the result variable before return. So, there's always a valid
object outside...

How to handle that?

Thanks,
-- 
Jonh Wendell
http://www.bani.com.br