godot/core/reference.cpp
Juan Linietsky 118eed485e ObjectTypeDB was renamed to ClassDB. Types are meant to be more generic to Variant.
All usages of "type" to refer to classes were renamed to "class"
ClassDB has been exposed to GDScript.
OBJ_TYPE() macro is now GDCLASS()
2017-01-02 23:03:46 -03:00

172 lines
4.7 KiB
C++

/*************************************************************************/
/* reference.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 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 "reference.h"
#include "script_language.h"
bool Reference::init_ref() {
if (refcount.ref()) {
// 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();
refcount.unref(); // first referencing is already 1, so compensate for the ref above
}
return true;
} else {
return false;
}
}
void Reference::_bind_methods() {
ClassDB::bind_method(_MD("init_ref"),&Reference::init_ref);
ClassDB::bind_method(_MD("reference"),&Reference::reference);
ClassDB::bind_method(_MD("unreference"),&Reference::unreference);
}
int Reference::reference_get_count() const {
return refcount.get();
}
void Reference::reference(){
refcount.ref();
if (get_script_instance()) {
get_script_instance()->refcount_incremented();
}
}
bool Reference::unreference(){
bool die = refcount.unref();
if (get_script_instance()) {
die = die && get_script_instance()->refcount_decremented();
}
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 = obj->cast_to<Reference>();
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(_MD("get_ref:Object"),&WeakRef::get_ref);
}
#if 0
Reference * RefBase::get_reference_from_ref(const RefBase &p_base) {
return p_base.get_reference();
}
void RefBase::ref_inc(Reference *p_reference) {
p_reference->refcount.ref();
}
bool RefBase::ref_dec(Reference *p_reference) {
bool ref = p_reference->refcount.unref();
return ref;
}
Reference *RefBase::first_ref(Reference *p_reference) {
if (p_reference->refcount.ref()) {
// 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 (p_reference->refcount_init.get()>0) {
p_reference->refcount_init.unref();
p_reference->refcount.unref(); // first referencing is already 1, so compensate for the ref above
}
return p_reference;
} else {
return 0;
}
}
char * RefBase::get_refptr_data(const RefPtr &p_refptr) const {
return p_refptr.data;
}
#endif