Home
Publications
Presentations
Support
Download
Examples
Developers
Class Docs
Namespaces
Classes
Files
Mailing Lists
Gallery
Wiki

auto_ptr.h

Go to the documentation of this file.

// Copyright (C) 2001, 2002 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.
 *
 */



#ifndef LIBMESH_AUTO_PTR_H
#define LIBMESH_AUTO_PTR_H

namespace libMesh
{

template<typename Tp1>
struct AutoPtrRef
{
  Tp1* _ptr;

  explicit
  AutoPtrRef(Tp1* p)
    : _ptr(p) {}
};


template<typename Tp>
class AutoPtr
{
private:

  Tp* _ptr;

public:
  typedef Tp element_type;

  explicit
  AutoPtr(element_type* p = 0)
    : _ptr(p) {}

  AutoPtr(AutoPtr& a)
    : _ptr(a.release()) {}

  template<typename Tp1>
  AutoPtr(AutoPtr<Tp1>& a)
    : _ptr(a.release()) {}

  AutoPtr&
  operator=(AutoPtr& a)
  {
    reset(a.release());
    return *this;
  }

  template <typename Tp1>
  AutoPtr&
  operator=(AutoPtr<Tp1>& a)
  {
    reset(a.release());
    return *this;
  }

  ~AutoPtr() { delete _ptr; }

  element_type&
  operator*() const  { return *_ptr; }

  element_type*
  operator->() const  { return _ptr; }

  element_type*
  get() const  { return _ptr; }

  element_type*
  release()
  {
    element_type* tmp = _ptr;
    _ptr = 0;
    return tmp;
  }

  void
  reset(element_type* p = 0)
  {
    if (p != _ptr)
      {
        delete _ptr;
        _ptr = p;
      }
  }

  AutoPtr(AutoPtrRef<element_type> ref)
    : _ptr(ref._ptr) {}

  AutoPtr&
  operator=(AutoPtrRef<element_type> ref)
  {
    if (ref._ptr != this->get())
      {
        delete _ptr;
        _ptr = ref._ptr;
      }
    return *this;
  }

  template<typename Tp1>
  operator AutoPtrRef<Tp1>()
  { return AutoPtrRef<Tp1>(this->release()); }

  template<typename Tp1>
  operator AutoPtr<Tp1>()
  { return AutoPtr<Tp1>(this->release()); }
};



} // namespace libMesh

#endif // LIBMESH_AUTO_PTR_H

---

Site Created By: libMesh Developers
Last modified: February 05 2013 19:54:45 UTC

Hosted By: