Anyway to know when RefCounted get freed?

[Snapper]

Godot Version

v4.2.1.stable.mono.official [b09f793f5]

Question

I am creating a state machine with node-less scripts, because of this I have gotten into a side track reading about refcounted vs Objects.

Is there anyway to see when a RefCounted object has been freed?

[trizZzle]

I haven’t tried it, but I guess this could work?

Godot notifications

What users might not realize is that notifications exist for types other than Node alone, for example:

• Object::NOTIFICATION_POSTINITIALIZE: a callback that triggers during object initialization. Not accessible to scripts.
• Object::NOTIFICATION_PREDELETE: a callback that triggers before the engine deletes an Object, i.e. a “destructor”.

public override void _Notification(int what)
{
    if (what == NotificationPredelete)
    {
        GD.Print("Goodbye!");
    }
}

[trizZzle]

Tested it in gdscript, seems to work:

class_name DeleteTestObject
extends RefCounted

func _notification(what):
	if what == NOTIFICATION_PREDELETE:
		print("Bye")

Create object and unreference it after 1 sec

extends Node

var object: DeleteTestObject

func _ready():
	object = DeleteTestObject.new()

	get_tree().create_timer(1).timeout.connect(func(): object = null)

Prints “bye”

[Snapper]

Thank you, I will give it a try!

[Snapper]

Yep, This seems to work. Thank you very much!