/**************************************************************************/ /* ref_counted.cpp */ /**************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /**************************************************************************/ /* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */ /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /**************************************************************************/ #include "ref_counted.h" #include "core/object/script_language.h" bool RefCounted::init_ref() { if (reference()) { if (!is_referenced() && refcount_init.unref()) { unreference(); // first referencing is already 1, so compensate for the ref above } return true; } else { return false; } } void RefCounted::_bind_methods() { ClassDB::bind_method(D_METHOD("init_ref"), &RefCounted::init_ref); ClassDB::bind_method(D_METHOD("reference"), &RefCounted::reference); ClassDB::bind_method(D_METHOD("unreference"), &RefCounted::unreference); ClassDB::bind_method(D_METHOD("get_reference_count"), &RefCounted::get_reference_count); } int RefCounted::get_reference_count() const { return refcount.get(); } bool RefCounted::reference() { uint32_t rc_val = refcount.refval(); bool success = rc_val != 0; if (success && rc_val <= 2 /* higher is not relevant */) { if (get_script_instance()) { get_script_instance()->refcount_incremented(); } if (_get_extension() && _get_extension()->reference) { _get_extension()->reference(_get_extension_instance()); } _instance_binding_reference(true); } return success; } bool RefCounted::unreference() { uint32_t rc_val = refcount.unrefval(); bool die = rc_val == 0; if (rc_val <= 1 /* higher is not relevant */) { if (get_script_instance()) { bool script_ret = get_script_instance()->refcount_decremented(); die = die && script_ret; } if (_get_extension() && _get_extension()->unreference) { _get_extension()->unreference(_get_extension_instance()); } bool binding_ret = _instance_binding_reference(false); die = die && binding_ret; } return die; } RefCounted::RefCounted() : Object(true) { refcount.init(); refcount_init.init(); } Variant WeakRef::get_ref() const { if (ref.is_null()) { return Variant(); } Object *obj = ObjectDB::get_instance(ref); if (!obj) { return Variant(); } RefCounted *r = cast_to<RefCounted>(obj); if (r) { return Ref<RefCounted>(r); } return obj; } void WeakRef::set_obj(Object *p_object) { ref = p_object ? p_object->get_instance_id() : ObjectID(); } void WeakRef::set_ref(const Ref<RefCounted> &p_ref) { ref = p_ref.is_valid() ? p_ref->get_instance_id() : ObjectID(); } void WeakRef::_bind_methods() { ClassDB::bind_method(D_METHOD("get_ref"), &WeakRef::get_ref); }