pcsx2/common/include/wx/scopedptr.h

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/////////////////////////////////////////////////////////////////////////////
// Name: wx/scopedptr.h
// Purpose: scoped smart pointer class
// Author: Jesse Lovelace <jllovela@eos.ncsu.edu>
// Created: 06/01/02
// RCS-ID: $Id: scopedptr.h 60411 2009-04-27 13:59:08Z CE $
// Copyright: (c) Jesse Lovelace and original Boost authors (see below)
// (c) 2009 Vadim Zeitlin
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#pragma once
#include "wx/defs.h"
// This class closely follows the implementation of the boost
// library scoped_ptr and is an adaption for c++ macro's in
// the wxWidgets project. The original authors of the boost
// scoped_ptr are given below with their respective copyrights.
// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
// Copyright (c) 2001, 2002 Peter Dimov
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
// See http://www.boost.org/libs/smart_ptr/scoped_ptr.htm for documentation.
//
// ----------------------------------------------------------------------------
// wxScopedPtr: A scoped pointer
// ----------------------------------------------------------------------------
template <class T>
class wxScopedPtr
{
public:
typedef T element_type;
wxEXPLICIT wxScopedPtr(T * ptr = NULL) : m_ptr(ptr) { }
~wxScopedPtr() { delete m_ptr; }
// test for pointer validity: defining conversion to unspecified_bool_type
// and not more obvious bool to avoid implicit conversions to integer types
typedef T *(wxScopedPtr<T>::*unspecified_bool_type)() const;
operator unspecified_bool_type() const
{
return m_ptr ? &wxScopedPtr<T>::get : NULL;
}
void reset(T * ptr = NULL)
{
if ( ptr != m_ptr )
{
delete m_ptr;
m_ptr = ptr;
}
}
T *release()
{
T *ptr = m_ptr;
m_ptr = NULL;
return ptr;
}
T & operator*() const
{
wxASSERT(m_ptr != NULL);
return *m_ptr;
}
T * operator->() const
{
wxASSERT(m_ptr != NULL);
return m_ptr;
}
T * get() const
{
return m_ptr;
}
void swap(wxScopedPtr& other)
{
T * const tmp = other.m_ptr;
other.m_ptr = m_ptr;
m_ptr = tmp;
}
private:
T * m_ptr;
wxScopedPtr(const wxScopedPtr<T>&);
wxScopedPtr& operator=(const wxScopedPtr<T>&);
};