projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 664e1314 VZ |
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 |