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/* ResidualVM - A 3D game interpreter
*
* ResidualVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef GRIM_OBJECT_H
#define GRIM_OBJECT_H
#include "common/list.h"
namespace Grim {
class SaveGame;
class Pointer;
class Object {
public:
Object();
virtual ~Object();
void reset() { };
void reference();
void dereference();
int32 getId() const;
private:
void setId(int32 id);
int _refCount;
Common::List<Pointer *> _pointers;
int32 _id;
static int32 s_id;
friend class Pointer;
};
class Pointer {
protected:
virtual ~Pointer() {}
void addPointer(Object *obj) {
obj->_pointers.push_back(this);
}
void rmPointer(Object *obj) {
obj->_pointers.remove(this);
}
virtual void resetPointer() {}
friend class Object;
};
template<class T> class ObjectPtr : public Pointer {
public:
ObjectPtr() :
_obj(nullptr) {
}
ObjectPtr(T *obj) :
_obj(obj) {
if (obj) {
Object *o = (Object *)_obj;
o->reference();
addPointer(o);
}
}
ObjectPtr(const ObjectPtr<T> &ptr) : Pointer() {
_obj = nullptr;
*this = ptr;
}
~ObjectPtr() {
if (_obj) {
Object *o = (Object *)_obj;
rmPointer(o);
o->dereference();
}
}
ObjectPtr &operator=(T *obj) {
if (obj != _obj) {
if (_obj) {
rmPointer(_obj);
_obj->dereference();
_obj = nullptr;
}
if (obj) {
_obj = obj;
_obj->reference();
addPointer(obj);
}
}
return *this;
}
ObjectPtr &operator=(const ObjectPtr<T> &ptr) {
if (_obj != ptr._obj) {
if (_obj) {
rmPointer(_obj);
_obj->dereference();
_obj = nullptr;
}
if (ptr._obj) {
_obj = ptr._obj;
_obj->reference();
addPointer(_obj);
}
}
return *this;
}
bool operator==(const ObjectPtr &ptr) const {
return (_obj == ptr._obj);
}
bool operator==(Object *obj) const {
return (_obj == obj);
}
operator bool() const {
return (_obj);
}
bool operator!() const {
return (!_obj);
}
T *object() const {
return _obj;
}
T *operator->() const {
return _obj;
}
T &operator*() const {
return *_obj;
}
operator T*() const {
return _obj;
}
protected:
void resetPointer() override {
_obj = nullptr;
}
private:
T *_obj;
};
}
#endif
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