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/* ScummVM - Graphic Adventure Engine
*
* ScummVM 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef TETRAEDGE_TE_TE_INTRUSIVE_PTR_H
#define TETRAEDGE_TE_TE_INTRUSIVE_PTR_H
namespace Tetraedge {
/**
Like the boost intrusive pointer. To be used with an
object inheriting from TeReferencesCounter
*/
template<class T> class TeIntrusivePtr {
public:
typedef void(T::*Tdestructor)();
TeIntrusivePtr() : _p(nullptr), _deleteFn(nullptr) {}
TeIntrusivePtr(const TeIntrusivePtr<T> &other) : _deleteFn(nullptr) {
_p = other._p;
if (_p)
_p->incrementCounter();
}
TeIntrusivePtr(T *obj) : _deleteFn(nullptr) {
_p = obj;
if (_p)
_p->incrementCounter();
}
virtual ~TeIntrusivePtr() {
release();
}
TeIntrusivePtr<T> &operator=(T *obj) {
if (_p != obj) {
release();
_p = obj;
if (_p)
_p->incrementCounter();
}
return *this;
}
TeIntrusivePtr<T> &operator=(const TeIntrusivePtr<T> &other) {
if (this != &other) {
release();
_p = other._p;
_deleteFn = other._deleteFn;
if (_p)
_p->incrementCounter();
}
return *this;
}
void release() {
if (_p) {
if (_p->decrementCounter()) {
if (_deleteFn)
(_p->*_deleteFn)();
else
delete _p;
}
}
_p = nullptr;
}
bool operator==(const TeIntrusivePtr<T> &other) const {
return (this == &other || _p == other._p);
}
T *get() {
return _p;
}
const T *get() const {
return _p;
}
T &operator*() {
return *_p;
}
const T &operator*() const {
return *_p;
}
operator bool() const {
return _p != nullptr;
}
T *operator->() {
return _p;
}
const T *operator->() const {
return _p;
}
void setDeleteFn(Tdestructor destructor) {
_deleteFn = destructor;
}
private:
T *_p;
Tdestructor _deleteFn;
};
} // end namespace Tetraedge
#endif // TETRAEDGE_TE_TE_INTRUSIVE_PTR_H
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