89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
/**************************************************************************
|
|
* auto_ptr.hxx -- A simple auto_ptr definition.
|
|
*
|
|
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* $Id$
|
|
**************************************************************************/
|
|
|
|
#ifndef _AUTO_PTR_HXX
|
|
#define _AUTO_PTR_HXX
|
|
|
|
#include "fg_stl_config.h"
|
|
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// auto_ptr is initialised with a pointer obtained via new and deletes that
|
|
// object when it itself is destroyed (such as when leaving block scope).
|
|
// auto_ptr can be used in any way that a normal pointer can be.
|
|
//
|
|
// This class is only required when the STL doesn't supply one.
|
|
//
|
|
template <class X> class auto_ptr {
|
|
private:
|
|
X* ptr;
|
|
mutable bool owns;
|
|
|
|
public:
|
|
typedef X element_type;
|
|
|
|
explicit auto_ptr(X* p = 0) : ptr(p), owns(p) {}
|
|
|
|
auto_ptr(const auto_ptr& a) : ptr(a.ptr), owns(a.owns) {
|
|
a.owns = 0;
|
|
}
|
|
|
|
#ifdef _FG_MEMBER_TEMPLATES
|
|
template <class T> auto_ptr(const auto_ptr<T>& a)
|
|
: ptr(a.ptr), owns(a.owns) {
|
|
a.owns = 0;
|
|
}
|
|
#endif
|
|
|
|
auto_ptr& operator = (const auto_ptr& a) {
|
|
if (&a != this) {
|
|
if (owns)
|
|
delete ptr;
|
|
owns = a.owns;
|
|
ptr = a.ptr;
|
|
a.owns = 0;
|
|
}
|
|
}
|
|
|
|
#ifdef _FG_MEMBER_TEMPLATES
|
|
template <class T> auto_ptr& operator = (const auto_ptr<T>& a) {
|
|
if (&a != this) {
|
|
if (owns)
|
|
delete ptr;
|
|
owns = a.owns;
|
|
ptr = a.ptr;
|
|
a.owns = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
~auto_ptr() {
|
|
if (owns)
|
|
delete ptr;
|
|
}
|
|
|
|
X& operator*() const { return *ptr; }
|
|
X* operator->() const { return ptr; }
|
|
X* get() const { return ptr; }
|
|
X* release() const { owns = false; return ptr; }
|
|
};
|
|
|
|
#endif /* _AUTO_PTR_HXX */
|
|
|