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// <memory> -*- C++ -*-
// Copyright (C) 2001 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library 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, or (at your option)
// any later version.
// This library 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 library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
/*
* Copyright (c) 1997-1999
* Silicon Graphics Computer Systems, Inc.
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*/
/** @file std_memory.h
* This is an internal header file, included by other library headers.
* You should not attempt to use it directly.
*/
#ifndef _CPP_MEMORY
#define _CPP_MEMORY 1
#pragma GCC system_header
#include <bits/stl_algobase.h>
#include <bits/stl_alloc.h>
#include <bits/stl_construct.h>
#include <bits/stl_iterator_base_types.h> //for iterator_traits
#include <bits/stl_tempbuf.h>
#include <bits/stl_uninitialized.h>
#include <bits/stl_raw_storage_iter.h>
namespace std
{
template<class _Tp1> struct auto_ptr_ref {
_Tp1* _M_ptr;
auto_ptr_ref(_Tp1* __p) : _M_ptr(__p) {}
};
/**
* A simple smart pointer providing strict ownership semantics. (More later.)
*/
template <class _Tp> class auto_ptr {
private:
_Tp* _M_ptr;
public:
typedef _Tp element_type;
explicit auto_ptr(_Tp* __p = 0) throw() : _M_ptr(__p) {}
auto_ptr(auto_ptr& __a) throw() : _M_ptr(__a.release()) {}
template <class _Tp1> auto_ptr(auto_ptr<_Tp1>& __a) throw()
: _M_ptr(__a.release()) {}
auto_ptr& operator=(auto_ptr& __a) throw() {
reset(__a.release());
return *this;
}
template <class _Tp1>
auto_ptr& operator=(auto_ptr<_Tp1>& __a) throw() {
reset(__a.release());
return *this;
}
// Note: The C++ standard says there is supposed to be an empty throw
// specification here, but omitting it is standard conforming. Its
// presence can be detected only if _Tp::~_Tp() throws, but (17.4.3.6/2)
// this is prohibited.
~auto_ptr() { delete _M_ptr; }
_Tp& operator*() const throw() {
return *_M_ptr;
}
_Tp* operator->() const throw() {
return _M_ptr;
}
_Tp* get() const throw() {
return _M_ptr;
}
_Tp* release() throw() {
_Tp* __tmp = _M_ptr;
_M_ptr = 0;
return __tmp;
}
void reset(_Tp* __p = 0) throw() {
if (__p != _M_ptr) {
delete _M_ptr;
_M_ptr = __p;
}
}
public:
auto_ptr(auto_ptr_ref<_Tp> __ref) throw()
: _M_ptr(__ref._M_ptr) {}
auto_ptr& operator=(auto_ptr_ref<_Tp> __ref) throw() {
if (__ref._M_ptr != this->get()) {
delete _M_ptr;
_M_ptr = __ref._M_ptr;
}
return *this;
}
template <class _Tp1> operator auto_ptr_ref<_Tp1>() throw()
{ return auto_ptr_ref<_Tp>(this->release()); }
template <class _Tp1> operator auto_ptr<_Tp1>() throw()
{ return auto_ptr<_Tp1>(this->release()); }
};
} // namespace std
#endif /* _CPP_MEMORY */
// Local Variables:
// mode:C++
// End:
|
