131 lines
4 KiB
C++
131 lines
4 KiB
C++
/*************************************************************************/
|
|
/* reference.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
|
|
/* */
|
|
/* 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 "reference.h"
|
|
|
|
#include "script_language.h"
|
|
|
|
bool Reference::init_ref() {
|
|
|
|
if (reference()) {
|
|
|
|
// this may fail in the scenario of two threads assigning the pointer for the FIRST TIME
|
|
// at the same time, which is never likely to happen (would be crazy to do)
|
|
// so don't do it.
|
|
|
|
if (refcount_init.get() > 0) {
|
|
refcount_init.unref();
|
|
unreference(); // first referencing is already 1, so compensate for the ref above
|
|
}
|
|
|
|
return true;
|
|
} else {
|
|
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void Reference::_bind_methods() {
|
|
|
|
ClassDB::bind_method(D_METHOD("init_ref"), &Reference::init_ref);
|
|
ClassDB::bind_method(D_METHOD("reference"), &Reference::reference);
|
|
ClassDB::bind_method(D_METHOD("unreference"), &Reference::unreference);
|
|
}
|
|
|
|
int Reference::reference_get_count() const {
|
|
return refcount.get();
|
|
}
|
|
|
|
bool Reference::reference() {
|
|
bool success = refcount.ref();
|
|
|
|
if (success && get_script_instance()) {
|
|
get_script_instance()->refcount_incremented();
|
|
}
|
|
|
|
return success;
|
|
}
|
|
|
|
bool Reference::unreference() {
|
|
|
|
bool die = refcount.unref();
|
|
|
|
if (get_script_instance()) {
|
|
bool script_ret = get_script_instance()->refcount_decremented();
|
|
die = die && script_ret;
|
|
}
|
|
|
|
return die;
|
|
}
|
|
|
|
Reference::Reference() {
|
|
|
|
refcount.init();
|
|
refcount_init.init();
|
|
}
|
|
|
|
Reference::~Reference() {
|
|
}
|
|
|
|
Variant WeakRef::get_ref() const {
|
|
|
|
if (ref == 0)
|
|
return Variant();
|
|
|
|
Object *obj = ObjectDB::get_instance(ref);
|
|
if (!obj)
|
|
return Variant();
|
|
Reference *r = cast_to<Reference>(obj);
|
|
if (r) {
|
|
|
|
return REF(r);
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
void WeakRef::set_obj(Object *p_object) {
|
|
ref = p_object ? p_object->get_instance_id() : 0;
|
|
}
|
|
|
|
void WeakRef::set_ref(const REF &p_ref) {
|
|
|
|
ref = p_ref.is_valid() ? p_ref->get_instance_id() : 0;
|
|
}
|
|
|
|
WeakRef::WeakRef() {
|
|
ref = 0;
|
|
}
|
|
|
|
void WeakRef::_bind_methods() {
|
|
|
|
ClassDB::bind_method(D_METHOD("get_ref"), &WeakRef::get_ref);
|
|
}
|