include/wx/msw/seh.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/seh.h
   3 // Purpose:     declarations for SEH (structured exceptions handling) support
   4 // Author:      Vadim Zeitlin
   5 // Created:     2006-04-26
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2006 Vadim Zeitlin <vadim@wxwindows.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_MSW_SEH_H_
  12 #define _WX_MSW_SEH_H_
  13
  14 #if wxUSE_ON_FATAL_EXCEPTION
  15
  16     // the exception handler which should be called from the exception filter
  17     //
  18     // it calsl wxApp::OnFatalException() if possible
  19     extern unsigned long wxGlobalSEHandler(EXCEPTION_POINTERS *pExcPtrs);
  20
  21     // helper macro for wxSEH_HANDLE
  22 #if defined(__BORLANDC__) || (defined(__VISUALC__) && (__VISUALC__ <= 1200))
  23     // some compilers don't understand that this code is unreachable and warn
  24     // about no value being returned from the function without it, so calm them
  25     // down
  26     #define wxSEH_DUMMY_RETURN(rc) return rc;
  27 #else
  28     #define wxSEH_DUMMY_RETURN(rc)
  29 #endif
  30
  31     // macros which allow to avoid many #if wxUSE_ON_FATAL_EXCEPTION in the code
  32     // which uses them
  33     #define wxSEH_TRY __try
  34     #define wxSEH_IGNORE __except ( EXCEPTION_EXECUTE_HANDLER ) { }
  35     #define wxSEH_HANDLE(rc)                                                  \
  36         __except ( wxGlobalSEHandler(GetExceptionInformation()) )             \
  37         {                                                                     \
  38             /* use the same exit code as abort() */                           \
  39             ::ExitProcess(3);                                                 \
  40                                                                               \
  41             wxSEH_DUMMY_RETURN(rc)                                            \
  42         }
  43
  44 #else // wxUSE_ON_FATAL_EXCEPTION
  45     #define wxSEH_TRY
  46     #define wxSEH_IGNORE
  47     #define wxSEH_HANDLE(rc)
  48 #endif // wxUSE_ON_FATAL_EXCEPTION
  49
  50 #if wxUSE_ON_FATAL_EXCEPTION && defined(__VISUALC__) && !defined(__WXWINCE__)
  51     #include <eh.h>
  52
  53     // C++ exception to structured exceptions translator: we need it in order
  54     // to prevent VC++ from "helpfully" translating structured exceptions (such
  55     // as division by 0 or access violation) to C++ pseudo-exceptions
  56     extern void wxSETranslator(unsigned int code, EXCEPTION_POINTERS *ep);
  57
  58     // up to VC 9 this warning ("calling _set_se_translator() requires /EHa")
  59     // is harmless and it's easier to suppress it than use different makefiles
  60     // for VC5 and 6 (which don't support /EHa at all) and VC7 (which does
  61     // accept it but it seems to change nothing for it anyhow)
  62     #if __VISUALC__ < 1600
  63         #pragma warning(disable: 4535)
  64     #endif
  65
  66     // note that the SE translator must be called wxSETranslator!
  67     #define DisableAutomaticSETranslator() _set_se_translator(wxSETranslator)
  68 #else // !__VISUALC__
  69     // the other compilers do nothing as stupid by default so nothing to do for
  70     // them
  71     #define DisableAutomaticSETranslator()
  72 #endif // __VISUALC__/!__VISUALC__
  73
  74 #endif // _WX_MSW_SEH_H_