Refactor Node Processing

* Node processing works on the concept of process groups.
* A node group can be inherited, run on main thread, or a sub-thread.
* Groups can be ordered.
* Process priority is now present for physics.

This is the first steps towards implementing https://github.com/godotengine/godot-proposals/issues/6424.
No threading or thread guards exist yet in most of the scene code other than Node. That will have to be added later.

1 files changed, 5 insertions, 0 deletions

diff --git a/core/object/object.cpp b/core/object/object.cpp
index 8ec385c0eb..1d63809fb1 100644
--- a/core/object/object.cpp
+++ b/core/object/object.cpp
@@ -201,6 +201,10 @@ bool Object::_predelete() {
 	return _predelete_ok;
 }
 
+void Object::cancel_free() {
+	_predelete_ok = false;
+}
+
 void Object::_postinitialize() {
 	_class_name_ptr = _get_class_namev(); // Set the direct pointer, which is much faster to obtain, but can only happen after postinitialize.
 	_initialize_classv();
@@ -1561,6 +1565,7 @@ void Object::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("tr_n", "message", "plural_message", "n", "context"), &Object::tr_n, DEFVAL(""));
 
 	ClassDB::bind_method(D_METHOD("is_queued_for_deletion"), &Object::is_queued_for_deletion);
+	ClassDB::bind_method(D_METHOD("cancel_free"), &Object::cancel_free);
 
 	ClassDB::add_virtual_method("Object", MethodInfo("free"), false);