mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-04 11:26:09 +00:00
114 lines
2.0 KiB
C++
114 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.0 (the "NPL"); you may not use this file except in
|
|
* compliance with the NPL. You may obtain a copy of the NPL at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
|
* for the specific language governing rights and limitations under the
|
|
* NPL.
|
|
*
|
|
* The Initial Developer of this code under the NPL is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
|
* Reserved.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
template <class T>
|
|
class own_ptr
|
|
/*
|
|
...implements strict ownership model (as |auto_ptr| once did, before it was ruined).
|
|
*/
|
|
{
|
|
public:
|
|
|
|
explicit
|
|
own_ptr( T* ptr = 0 )
|
|
: _ptr(ptr)
|
|
{
|
|
// nothing else to do
|
|
}
|
|
|
|
own_ptr( own_ptr<T>& P )
|
|
: _ptr( P.release() )
|
|
{
|
|
// nothing else to do
|
|
}
|
|
|
|
~own_ptr()
|
|
{
|
|
delete _ptr;
|
|
}
|
|
|
|
|
|
own_ptr<T>&
|
|
operator=( T* P )
|
|
{
|
|
if ( _ptr != P )
|
|
{
|
|
delete _ptr;
|
|
_ptr = P;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
own_ptr<T>&
|
|
operator=( own_ptr<T>& P )
|
|
{
|
|
return operator=( P.release() ); // (also) handles the self-assignment case
|
|
}
|
|
|
|
T&
|
|
operator*() const
|
|
{
|
|
// PRECONDITION( _ptr );
|
|
|
|
//#if !defined(__NO_bad_dereference__)
|
|
// if ( !_ptr )
|
|
// throw bad_dereference();
|
|
//#endif
|
|
return *_ptr;
|
|
}
|
|
|
|
T*
|
|
operator->() const
|
|
{
|
|
// PRECONDITION( _ptr );
|
|
|
|
//#if !defined(__NO_bad_dereference__)
|
|
// if ( !_ptr )
|
|
// throw bad_dereference();
|
|
//#endif
|
|
return _ptr;
|
|
}
|
|
|
|
T*
|
|
get() const
|
|
{
|
|
return _ptr;
|
|
}
|
|
|
|
T*
|
|
release()
|
|
{
|
|
T* P = _ptr;
|
|
_ptr = 0;
|
|
return P;
|
|
}
|
|
|
|
bool
|
|
is_void() const
|
|
{
|
|
return _ptr == 0;
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
T* _ptr;
|
|
};
|