class_name UIAutoloadGrabber extends Control

static var _lock: NonReentrantCoroutineMutex
static func _static_init() -> void:
	_lock = NonReentrantCoroutineMutex.new()

var acquired := false
@onready var _root := get_tree().root

func acquire() -> void:
	if not acquired:
		await _lock.acquire()
		_root.remove_child(UI)
		add_child(UI)
		acquired = true

func relinquish() -> void:
	if acquired:
		if UI.get_parent() == self:
			child_exiting_tree.disconnect(relinquish)
			remove_child(UI)
			child_exiting_tree.connect(relinquish)
		_root.add_child(UI)
		acquired = false
		_lock.relinquish()