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Applied patch [ 587450 ] Scoped Smart pointers and docs

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By Jesse Lovelace (thementat)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16409 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Julian Smart
2002-08-08 09:57:05 +00:00
parent 73c3b37be1
commit 5b222f1c9e
4 changed files with 378 additions and 0 deletions
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164
include/wx/ptr_scpd.h Normal file
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/////////////////////////////////////////////////////////////////////////////
// Name: wx/ptr_scpd.h
// Purpose: scoped smart pointer class
// Author: Jesse Lovelace <jllovela@eos.ncsu.edu>
// Modified by:
// Created: 06/01/02
// RCS-ID: $Id$
// Copyright: (c) Jesse Lovelace and original Boost authors (see below)
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
// This class closely follows the implementation of the boost
// library scoped_ptr and is an adaption for c++ macro's in
// the wxWindows 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.
//
#ifndef __WX_SCOPED_POINTER__
#define __WX_SCOPED_POINTER__
#include "wx/defs.h"
/* checked deleters are used to make sure that the
type being deleted is really a complete type.
- Jesse Lovelace <jllovela@eos.ncsu.edu>
*/
#define wxCHECKED_DELETE(ptr) \
if (true) { \
typedef char complete[sizeof(*ptr)]; \
delete ptr; \
}
#define wxCHECKED_DELETE_ARRAY(ptr) \
if (true) { \
typedef char complete[sizeof(*ptr)]; \
delete [] ptr; \
}
/* These scoped pointers are *not* assignable and cannot be used
within a container. Look for wxDECLARE_SHARED_PTR for this
functionality.
In addition, the type being used *must* be complete at the time
that wxDEFINE_SCOPED_* is called or a compiler error will result.
This is because the class checks for the completeness of the type
being used.
*/
#define wxDECLARE_SCOPED_PTR(T, name) \
class name \
{ \
private: \
T * m_ptr; \
\
name(name const &); \
name & operator=(name const &); \
\
public: \
wxEXPLICIT name(T * ptr = NULL) \
: m_ptr(ptr) { } \
\
~name(); \
\
void reset(T * ptr = NULL) \
{ \
if (m_ptr != ptr) \
{ \
delete m_ptr; \
m_ptr = 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(name & ot) \
{ \
T * tmp = ot.m_ptr; \
ot.m_ptr = m_ptr; \
m_ptr = tmp; \
} \
};
#define wxDEFINE_SCOPED_PTR(T, name)\
name::~name() \
{ \
wxCHECKED_DELETE(m_ptr) \
}
#define wxDECLARE_SCOPED_ARRAY(T, name)\
class name \
{ \
private: \
T * m_ptr; \
name(name const &); \
name & operator=(name const &); \
\
public: \
wxEXPLICIT name(T * p = NULL) : m_ptr(p) \
{} \
\
~name(); \
void reset(T * p = NULL); \
\
T & operator[](long int i) const\
{ \
wxASSERT(m_ptr != NULL); \
wxASSERT(i >= 0); \
return m_ptr[i]; \
} \
\
T * get() const \
{ \
return m_ptr; \
} \
\
void swap(name & ot) \
{ \
T * tmp = ot.m_ptr; \
ot.m_ptr = m_ptr; \
m_ptr = tmp; \
} \
};
#define wxDEFINE_SCOPED_ARRAY(T, name) \
name::~name() \
{ \
wxCHECKED_DELETE_ARRAY(m_ptr) \
} \
void name::reset(T * p){ \
if (m_ptr != p) \
{ \
wxCHECKED_DELETE_ARRAY(m_ptr); \
m_ptr = p; \
} \
}
#endif