godot/core/ref_ptr.cpp

/*************************************************************************/
/*  ref_ptr.cpp                                                          */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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#include "ref_ptr.h"
#include "reference.h"
#include "resource.h"

void RefPtr::operator=(const RefPtr &p_other) {

	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	Ref<Reference> *ref_other = reinterpret_cast<Ref<Reference> *>(const_cast<char *>(&p_other.data[0]));

	*ref = *ref_other;
}

bool RefPtr::operator==(const RefPtr &p_other) const {

	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	Ref<Reference> *ref_other = reinterpret_cast<Ref<Reference> *>(const_cast<char *>(&p_other.data[0]));

	return *ref == *ref_other;
}

RefPtr::RefPtr(const RefPtr &p_other) {

	memnew_placement(&data[0], Ref<Reference>);

	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	Ref<Reference> *ref_other = reinterpret_cast<Ref<Reference> *>(const_cast<char *>(&p_other.data[0]));

	*ref = *ref_other;
}

bool RefPtr::is_null() const {

	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	return ref->is_null();
}

RID RefPtr::get_rid() const {

	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	if (ref->is_null())
		return RID();
	Resource *res = (*ref)->cast_to<Resource>();
	if (res)
		return res->get_rid();
	return RID();
}

void RefPtr::unref() {

	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	ref->unref();
}

RefPtr::RefPtr() {

	ERR_FAIL_COND(sizeof(Ref<Reference>) > DATASIZE);
	memnew_placement(&data[0], Ref<Reference>);
}

RefPtr::~RefPtr() {

	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	ref->~Ref<Reference>();
}