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http://code.google.com/p/rpcs3/source/detail?r=44

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DH 2012-11-15 01:39:56 +02:00
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wxWidgets/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: ptr_scpd.h 35688 2005-09-25 19:59:19Z VZ $
// Copyright: (c) Jesse Lovelace and original Boost authors (see below)
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// 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.
//
#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.: otherwise sizeof() would result in a compile-time error
do { ... } while ( 0 ) construct is used to have an anonymous scope
(otherwise we could have name clashes between different "complete"s) but
still force a semicolon after the macro
*/
#ifdef __WATCOMC__
#define wxFOR_ONCE(name) for(int name=0; name<1; name++)
#define wxPRE_NO_WARNING_SCOPE(name) wxFOR_ONCE(wxMAKE_UNIQUE_NAME(name))
#define wxPOST_NO_WARNING_SCOPE(name)
#else
#define wxPRE_NO_WARNING_SCOPE(name) do
#define wxPOST_NO_WARNING_SCOPE(name) while ( wxFalse )
#endif
#define wxCHECKED_DELETE(ptr) \
wxPRE_NO_WARNING_SCOPE(scope_var1) \
{ \
typedef char complete[sizeof(*ptr)]; \
delete ptr; \
} wxPOST_NO_WARNING_SCOPE(scope_var1)
#define wxCHECKED_DELETE_ARRAY(ptr) \
wxPRE_NO_WARNING_SCOPE(scope_var2) \
{ \
typedef char complete[sizeof(*ptr)]; \
delete [] ptr; \
} wxPOST_NO_WARNING_SCOPE(scope_var2)
/* 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 *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(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); \
}
// this macro can be used for the most common case when you want to declare and
// define the scoped pointer at the same time and want to use the standard
// naming convention: auto pointer to Foo is called FooPtr
#define wxDEFINE_SCOPED_PTR_TYPE(T) \
wxDECLARE_SCOPED_PTR(T, T ## Ptr) \
wxDEFINE_SCOPED_PTR(T, T ## Ptr)
// the same but for arrays instead of simple pointers
#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; \
} \
}
// ----------------------------------------------------------------------------
// "Tied" scoped pointer: same as normal one but also sets the value of
// some other variable to the pointer value
// ----------------------------------------------------------------------------
#define wxDEFINE_TIED_SCOPED_PTR_TYPE(T) \
wxDEFINE_SCOPED_PTR_TYPE(T) \
class T ## TiedPtr : public T ## Ptr \
{ \
public: \
T ## TiedPtr(T **pp, T *p) \
: T ## Ptr(p), m_pp(pp) \
{ \
m_pOld = *pp; \
*pp = p; \
} \
\
~ T ## TiedPtr() \
{ \
*m_pp = m_pOld; \
} \
\
private: \
T **m_pp; \
T *m_pOld; \
};
#endif // __WX_SCOPED_POINTER__