godot/core/ref_ptr.cpp

/*************************************************************************/
/*  ref_ptr.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,  */
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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>();
}