X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/58187c862cf9d22919d2d672a17a33bdf9548aba..02d5015b1cbb99d7a2e2ab7818cd46b2b4514957:/src/msw/main.cpp diff --git a/src/msw/main.cpp b/src/msw/main.cpp index 900ef4fdef..4676a2d241 100644 --- a/src/msw/main.cpp +++ b/src/msw/main.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: msw/main.cpp +// Name: src/msw/main.cpp // Purpose: WinMain/DllMain // Author: Julian Smart // Modified by: @@ -17,10 +17,6 @@ // headers // ---------------------------------------------------------------------------- -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) - #pragma implementation -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -28,48 +24,78 @@ #pragma hdrstop #endif -#include "wx/event.h" -#include "wx/app.h" +#ifndef WX_PRECOMP + #include "wx/event.h" + #include "wx/app.h" +#endif //WX_PRECOMP + #include "wx/cmdline.h" +#include "wx/scopeguard.h" #include "wx/msw/private.h" +#include "wx/msw/seh.h" #if wxUSE_ON_FATAL_EXCEPTION #include "wx/datetime.h" #include "wx/msw/crashrpt.h" - - #ifdef __VISUALC__ - #include - #endif // __VISUALC__ #endif // wxUSE_ON_FATAL_EXCEPTION #ifdef __WXWINCE__ // there is no ExitProcess() under CE but exiting the main thread has the // same effect - #define ExitProcess ExitThread -#endif + #ifndef ExitProcess + #define ExitProcess ExitThread + #endif +#endif // __WXWINCE__ #ifdef __BORLANDC__ // BC++ has to be special: its run-time expects the DLL entry point to be // named DllEntryPoint instead of the (more) standard DllMain #define DllMain DllEntryPoint -#endif +#endif // __BORLANDC__ #if defined(__WXMICROWIN__) #define HINSTANCE HANDLE #endif +// defined in common/init.cpp +extern int wxEntryReal(int& argc, wxChar **argv); + // ============================================================================ // implementation: various entry points // ============================================================================ +#if wxUSE_BASE + +#if wxUSE_ON_FATAL_EXCEPTION && defined(__VISUALC__) && !defined(__WXWINCE__) + // VC++ (at least from 4.0 up to version 7.1) is incredibly broken in that + // a "catch ( ... )" will *always* catch SEH exceptions in it even though + // it should have never been the case... to prevent such catches from + // stealing the exceptions from our wxGlobalSEHandler which is only called + // if the exception is not handled elsewhere, we have to also call it from + // a special SEH translator function which is called by VC CRT when a Win32 + // exception occurs + + // this warns that /EHa (async exceptions) should be used when using + // _set_se_translator but, in fact, this doesn't seem to change anything + // with VC++ up to 8.0 + #if _MSC_VER <= 1400 + #pragma warning(disable:4535) + #endif + + // note that the SE translator must be called wxSETranslator! + #define DisableAutomaticSETranslator() _set_se_translator(wxSETranslator) +#else // !__VISUALC__ + #define DisableAutomaticSETranslator() +#endif // __VISUALC__/!__VISUALC__ + // ---------------------------------------------------------------------------- -// wrapper wxEntry catching all Win32 exceptions occuring in a wx program +// wrapper wxEntry catching all Win32 exceptions occurring in a wx program // ---------------------------------------------------------------------------- // wrap real wxEntry in a try-except block to be able to call // OnFatalException() if necessary -#if wxUSE_ON_FATAL_EXCEPTION && wxUSE_BASE +#if wxUSE_ON_FATAL_EXCEPTION // global pointer to exception information, only valid inside OnFatalException, // used by wxStackWalker and wxCrashReport @@ -78,6 +104,12 @@ extern EXCEPTION_POINTERS *wxGlobalSEInformation = NULL; // flag telling us whether the application wants to handle exceptions at all static bool gs_handleExceptions = false; +static void wxFatalExit() +{ + // use the same exit code as abort() + ::ExitProcess(3); +} + unsigned long wxGlobalSEHandler(EXCEPTION_POINTERS *pExcPtrs) { if ( gs_handleExceptions && wxTheApp ) @@ -86,16 +118,11 @@ unsigned long wxGlobalSEHandler(EXCEPTION_POINTERS *pExcPtrs) wxGlobalSEInformation = pExcPtrs; // give the user a chance to do something special about this - __try + wxSEH_TRY { wxTheApp->OnFatalException(); } - __except ( EXCEPTION_EXECUTE_HANDLER ) - { - // nothing to do here, just ignore the exception inside the - // exception handler - ; - } + wxSEH_IGNORE // ignore any exceptions inside the exception handler wxGlobalSEInformation = NULL; @@ -108,9 +135,29 @@ unsigned long wxGlobalSEHandler(EXCEPTION_POINTERS *pExcPtrs) #ifdef __VISUALC__ -static void wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS *ep) +void wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS *ep) { - wxGlobalSEHandler(ep); + switch ( wxGlobalSEHandler(ep) ) + { + default: + wxFAIL_MSG( _T("unexpected wxGlobalSEHandler() return value") ); + // fall through + + case EXCEPTION_EXECUTE_HANDLER: + // if wxApp::OnFatalException() had been called we should exit the + // application -- but we shouldn't kill our host when we're a DLL +#ifndef WXMAKINGDLL + wxFatalExit(); +#endif // not a DLL + break; + + case EXCEPTION_CONTINUE_SEARCH: + // we're called for each "catch ( ... )" and if we (re)throw from + // here, the catch handler body is not executed, so the effect is + // as if had inhibited translation of SE to C++ ones because the + // handler will never see any structured exceptions + throw; + } } #endif // __VISUALC__ @@ -120,25 +167,6 @@ bool wxHandleFatalExceptions(bool doit) // assume this can only be called from the main thread gs_handleExceptions = doit; -#ifdef __VISUALC__ - // VC++ (at least from 4.0 up to version 7.1) is incredibly broken in that - // a "catch ( ... )" will *always* catch SEH exceptions in it even though - // it should have never been the case... to prevent such catches from - // stealing the exceptions from our wxGlobalSEHandler which is only called - // if the exception is not handled elsewhere, we have to also call it from - // a special SEH translator function which is called by VC CRT when a Win32 - // exception occurs - - // this warns that /EHa (async exceptions) should be used when using - // _set_se_translator but, in fact, this doesn't seem to change anything - // with VC++ up to 7.1 -- to be confirmed with VC++ 8 - #if _MSC_VER <= 1310 - #pragma warning(disable:4535) - #endif - - _set_se_translator(doit ? wxSETranslator : NULL); -#endif - #if wxUSE_CRASHREPORT if ( doit ) { @@ -173,37 +201,151 @@ bool wxHandleFatalExceptions(bool doit) int wxEntry(int& argc, wxChar **argv) { - __try - { - extern int wxEntryReal(int& argc, wxChar **argv); + DisableAutomaticSETranslator(); + wxSEH_TRY + { return wxEntryReal(argc, argv); } - __except ( wxGlobalSEHandler(GetExceptionInformation()) ) - { - ::ExitProcess(3); // the same exit code as abort() + wxSEH_HANDLE(-1) +} -#if !defined(_MSC_VER) || _MSC_VER < 1300 - // this code is unreachable but put it here to suppress warnings - // from some compilers - return -1; +#else // !wxUSE_ON_FATAL_EXCEPTION + +#if defined(__VISUALC__) && !defined(__WXWINCE__) + +static void +wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS * WXUNUSED(ep)) +{ + // see wxSETranslator() version for wxUSE_ON_FATAL_EXCEPTION above + throw; +} + +#endif // __VISUALC__ + +int wxEntry(int& argc, wxChar **argv) +{ + DisableAutomaticSETranslator(); + + return wxEntryReal(argc, argv); +} + +#endif // wxUSE_ON_FATAL_EXCEPTION/!wxUSE_ON_FATAL_EXCEPTION + +#endif // wxUSE_BASE + +#if wxUSE_GUI && defined(__WXMSW__) + +#if wxUSE_UNICODE && !defined(__WXWINCE__) + #define NEED_UNICODE_CHECK #endif + +#ifdef NEED_UNICODE_CHECK + +// check whether Unicode is available +static bool wxIsUnicodeAvailable() +{ + static const wchar_t *ERROR_STRING = L"wxWidgets Fatal Error"; + + if ( wxGetOsVersion() != wxOS_WINDOWS_NT ) + { + // we need to be built with MSLU support +#if !wxUSE_UNICODE_MSLU + // note that we can use MessageBoxW() as it's implemented even under + // Win9x - OTOH, we can't use wxGetTranslation() because the file APIs + // used by wxLocale are not + ::MessageBox + ( + NULL, + L"This program uses Unicode and requires Windows NT/2000/XP.\n" + L"\n" + L"Program aborted.", + ERROR_STRING, + MB_ICONERROR | MB_OK + ); + + return false; +#else // wxUSE_UNICODE_MSLU + // and the MSLU DLL must also be available + HMODULE hmod = ::LoadLibraryA("unicows.dll"); + if ( !hmod ) + { + ::MessageBox + ( + NULL, + L"This program uses Unicode and requires unicows.dll to work " + L"under current operating system.\n" + L"\n" + L"Please install unicows.dll and relaunch the program.", + ERROR_STRING, + MB_ICONERROR | MB_OK + ); + return false; + } + + // this is not really necessary but be tidy + ::FreeLibrary(hmod); + + // finally do the last check: has unicows.lib initialized correctly? + hmod = ::LoadLibraryW(L"unicows.dll"); + if ( !hmod ) + { + ::MessageBox + ( + NULL, + L"This program uses Unicode but is not using unicows.dll\n" + L"correctly and so cannot work under current operating system.\n" + L"Please contact the program author for an updated version.\n" + L"\n" + L"Program aborted.", + ERROR_STRING, + MB_ICONERROR | MB_OK + ); + + return false; + } + + ::FreeLibrary(hmod); +#endif // !wxUSE_UNICODE_MSLU } -} -#endif // wxUSE_ON_FATAL_EXCEPTION && wxUSE_BASE + return true; +} -#if wxUSE_GUI +#endif // NEED_UNICODE_CHECK // ---------------------------------------------------------------------------- // Windows-specific wxEntry // ---------------------------------------------------------------------------- +// helper function used to clean up in wxEntry() just below +// +// notice that argv elements are supposed to be allocated using malloc() while +// argv array itself is allocated with new +static void wxFreeArgs(int argc, wxChar **argv) +{ + for ( int i = 0; i < argc; i++ ) + { + free(argv[i]); + } + + delete [] argv; +} + WXDLLEXPORT int wxEntry(HINSTANCE hInstance, HINSTANCE WXUNUSED(hPrevInstance), wxCmdLineArgType WXUNUSED(pCmdLine), int nCmdShow) { + // the first thing to do is to check if we're trying to run an Unicode + // program under Win9x w/o MSLU emulation layer - if so, abort right now + // as it has no chance to work and has all chances to crash +#ifdef NEED_UNICODE_CHECK + if ( !wxIsUnicodeAvailable() ) + return -1; +#endif // NEED_UNICODE_CHECK + + // remember the parameters Windows gave us wxSetInstance(hInstance); wxApp::m_nCmdShow = nCmdShow; @@ -238,59 +380,12 @@ WXDLLEXPORT int wxEntry(HINSTANCE hInstance, // argv[] must be NULL-terminated argv[argc] = NULL; - return wxEntry(argc, argv); -} - -// May wish not to have a DllMain or WinMain, e.g. if we're programming -// a Netscape plugin or if we're writing a console application -#if !defined(NOMAIN) - -extern "C" -{ - -// ---------------------------------------------------------------------------- -// WinMain -// ---------------------------------------------------------------------------- - -// Note that WinMain is also defined in dummy.obj, which is linked to -// an application that is using the DLL version of wxWidgets. - -#if defined(_WINDLL) - -// DLL entry point - -BOOL WINAPI -DllMain(HANDLE hModule, DWORD fdwReason, LPVOID WXUNUSED(lpReserved)) -{ - // Only call wxEntry if the application itself is part of the DLL. - // If only the wxWidgets library is in the DLL, then the - // initialisation will be called when the application implicitly - // calls WinMain. -#ifndef WXMAKINGDLL - switch (fdwReason) - { - case DLL_PROCESS_ATTACH: - return wxEntry(hModule); + wxON_BLOCK_EXIT2(wxFreeArgs, argc, argv); - case DLL_PROCESS_DETACH: - wxEntryCleanup(); - break; - } -#else - (void)hModule; - (void)fdwReason; -#endif // !WXMAKINGDLL - - return TRUE; + return wxEntry(argc, argv); } -#endif // _WINDLL - -} // extern "C" - -#endif // !NOMAIN - -#endif // wxUSE_GUI +#endif // wxUSE_GUI && __WXMSW__ // ---------------------------------------------------------------------------- // global HINSTANCE @@ -311,4 +406,3 @@ void wxSetInstance(HINSTANCE hInst) } #endif // wxUSE_BASE -