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1///////////////////////////////////////////////////////////////////////////////
2// Name: wx/checkeddelete.h
3// Purpose: wxCHECKED_DELETE() macro
4// Author: Vadim Zeitlin
5// Created: 2009-02-03
6// RCS-ID: $Id$
7// Copyright: (c) 2002-2009 wxWidgets dev team
8// Licence: wxWindows licence
9///////////////////////////////////////////////////////////////////////////////
10
11#ifndef _WX_CHECKEDDELETE_H_
12#define _WX_CHECKEDDELETE_H_
13
14// TODO: provide wxCheckedDelete[Array]() template functions too
15
16// ----------------------------------------------------------------------------
17// wxCHECKED_DELETE and wxCHECKED_DELETE_ARRAY macros
18// ----------------------------------------------------------------------------
19
20/*
21 checked deleters are used to make sure that the type being deleted is really
22 a complete type.: otherwise sizeof() would result in a compile-time error
23
24 do { ... } while ( 0 ) construct is used to have an anonymous scope
25 (otherwise we could have name clashes between different "complete"s) but
26 still force a semicolon after the macro
27*/
28
29#ifdef __WATCOMC__
30 #define wxFOR_ONCE(name) for(int name=0; name<1; name++)
31 #define wxPRE_NO_WARNING_SCOPE(name) wxFOR_ONCE(wxMAKE_UNIQUE_NAME(name))
32 #define wxPOST_NO_WARNING_SCOPE(name)
33#else
34 #define wxPRE_NO_WARNING_SCOPE(name) do
35 #define wxPOST_NO_WARNING_SCOPE(name) while ( wxFalse )
36#endif
37
38#define wxCHECKED_DELETE(ptr) \
39 wxPRE_NO_WARNING_SCOPE(scope_var1) \
40 { \
41 typedef char complete[sizeof(*ptr)]; \
42 delete ptr; \
43 } wxPOST_NO_WARNING_SCOPE(scope_var1)
44
45#define wxCHECKED_DELETE_ARRAY(ptr) \
46 wxPRE_NO_WARNING_SCOPE(scope_var2) \
47 { \
48 typedef char complete[sizeof(*ptr)]; \
49 delete [] ptr; \
50 } wxPOST_NO_WARNING_SCOPE(scope_var2)
51
52
53#endif // _WX_CHECKEDDELETE_H_
54