X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/57c208c5759da71a637f0f0f5b7d3dc3eda09c02..3d45718de50d193798dee93ce2fe8758f0f0acd6:/src/msw/main.cpp diff --git a/src/msw/main.cpp b/src/msw/main.cpp index 45db41d119..5c11efd693 100644 --- a/src/msw/main.cpp +++ b/src/msw/main.cpp @@ -1,102 +1,434 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: main.cpp -// Purpose: Main/DllMain +// Name: src/msw/main.cpp +// Purpose: WinMain/DllMain // Author: Julian Smart // Modified by: // Created: 04/01/98 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows license +// Copyright: (c) Julian Smart +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation -#endif +// ============================================================================ +// declarations +// ============================================================================ + +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif -#include "wx/event.h" -#include "wx/app.h" -#include +#ifndef WX_PRECOMP + #include "wx/event.h" + #include "wx/app.h" + #include "wx/utils.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" +#endif // wxUSE_ON_FATAL_EXCEPTION + +#ifdef __WXWINCE__ + // there is no ExitProcess() under CE but exiting the main thread has the + // same effect + #ifndef ExitProcess + #define ExitProcess ExitThread + #endif +#endif // __WXWINCE__ -// May wish not to have a DllMain or WinMain, e.g. if we're programming -// a Netscape plugin. -#ifndef NOMAIN +#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 // __BORLANDC__ -// NT defines APIENTRY, 3.x not -#if !defined(APIENTRY) -#define APIENTRY FAR PASCAL +#if defined(__WXMICROWIN__) + #define HINSTANCE HANDLE #endif -///////////////////////////////////////////////////////////////////////////////// -// WinMain -// Note that WinMain is also defined in dummy.obj, which is linked to -// an application that is using the DLL version of wxWindows. +// defined in common/init.cpp +extern int wxEntryReal(int& argc, wxChar **argv); +extern int wxEntryCleanupReal(int& argc, wxChar **argv); -#if !defined(_WINDLL) +// ============================================================================ +// implementation: various entry points +// ============================================================================ -#ifdef __TWIN32__ +#if wxUSE_BASE -extern "C" -BOOL PASCAL WinMain(HANDLE hInstance, HANDLE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) +// ---------------------------------------------------------------------------- +// wrapper wxEntry catching all Win32 exceptions occurring in a wx program +// ---------------------------------------------------------------------------- -#else +// wrap real wxEntry in a try-except block to be able to call +// OnFatalException() if necessary +#if wxUSE_ON_FATAL_EXCEPTION -#ifdef __WATCOMC__ -int PASCAL -#else -int APIENTRY -#endif +#if 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 - WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow ) -#endif -// __TWIN32__ + // 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__ + +// global pointer to exception information, only valid inside OnFatalException, +// used by wxStackWalker and wxCrashReport +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() { - return wxEntry((WXHINSTANCE) hInstance, (WXHINSTANCE) hPrevInstance, lpCmdLine, nCmdShow); + // use the same exit code as abort() + ::ExitProcess(3); } -#endif -///////////////////////////////////////////////////////////////////////////////// -// DllMain +unsigned long wxGlobalSEHandler(EXCEPTION_POINTERS *pExcPtrs) +{ + if ( gs_handleExceptions && wxTheApp ) + { + // store the pointer to exception info + wxGlobalSEInformation = pExcPtrs; -#if defined(_WINDLL) + // give the user a chance to do something special about this + wxSEH_TRY + { + wxTheApp->OnFatalException(); + } + wxSEH_IGNORE // ignore any exceptions inside the exception handler -// DLL entry point + wxGlobalSEInformation = NULL; -extern "C" -#ifdef __BORLANDC__ -// SCD: I don't know why, but also OWL uses this function -BOOL WINAPI DllEntryPoint (HANDLE hModule, DWORD fdwReason, LPVOID lpReserved) -#else -BOOL WINAPI DllMain (HANDLE hModule, DWORD fdwReason, LPVOID lpReserved) -#endif + // this will execute our handler and terminate the process + return EXCEPTION_EXECUTE_HANDLER; + } + + return EXCEPTION_CONTINUE_SEARCH; +} + +#ifdef __VISUALC__ + +void wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS *ep) { - switch (fdwReason) - { - case DLL_PROCESS_ATTACH: - // Only call wxEntry if the application itself is part of the DLL. - // If only the wxWindows library is in the DLL, then the initialisation - // will be called when the application implicitly calls WinMain. - -#if !defined(WXMAKINGDLL) - return wxEntry((WXHINSTANCE) hModule); -#endif - break; + 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; + } +} - case DLL_PROCESS_DETACH: - default: - break; - } - return TRUE; +#endif // __VISUALC__ + +bool wxHandleFatalExceptions(bool doit) +{ + // assume this can only be called from the main thread + gs_handleExceptions = doit; + +#if wxUSE_CRASHREPORT + if ( doit ) + { + // try to find a place where we can put out report file later + wxChar fullname[MAX_PATH]; + if ( !::GetTempPath(WXSIZEOF(fullname), fullname) ) + { + wxLogLastError(_T("GetTempPath")); + + // when all else fails... + wxStrcpy(fullname, _T("c:\\")); + } + + // use PID and date to make the report file name more unique + wxString name = wxString::Format + ( + _T("%s_%s_%lu.dmp"), + wxTheApp ? (const wxChar*)wxTheApp->GetAppDisplayName().c_str() + : _T("wxwindows"), + wxDateTime::Now().Format(_T("%Y%m%dT%H%M%S")).c_str(), + ::GetCurrentProcessId() + ); + + wxStrncat(fullname, name, WXSIZEOF(fullname) - wxStrlen(fullname) - 1); + + wxCrashReport::SetFileName(fullname); + } +#endif // wxUSE_CRASHREPORT + + return true; +} + +int wxEntry(int& argc, wxChar **argv) +{ + DisableAutomaticSETranslator(); + + wxSEH_TRY + { + return wxEntryReal(argc, argv); + } + wxSEH_HANDLE(-1) } +#else // !wxUSE_ON_FATAL_EXCEPTION + +int wxEntry(int& argc, wxChar **argv) +{ + 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 + } + + return true; +} + +#endif // NEED_UNICODE_CHECK + +// ---------------------------------------------------------------------------- +// Windows-specific wxEntry +// ---------------------------------------------------------------------------- + +struct wxMSWCommandLineArguments +{ + wxMSWCommandLineArguments() { argc = 0; argv = NULL; } + + void Init(const wxArrayString& args) + { + argc = args.size(); + + // +1 here for the terminating NULL + argv = new wxChar *[argc + 1]; + for ( int i = 0; i < argc; i++ ) + { + argv[i] = wxStrdup(args[i].wx_str()); + } + + // argv[] must be NULL-terminated + argv[argc] = NULL; + } + + void Free() + { + if ( !argc ) + return; + + for ( int i = 0; i < argc; i++ ) + { + free(argv[i]); + } + + delete [] argv; + argv = NULL; + argc = 0; + } + + int argc; + wxChar **argv; +}; + +static wxMSWCommandLineArguments wxArgs; + +// common part of wxMSW-specific wxEntryStart() and wxEntry() overloads +static bool +wxMSWEntryCommon(HINSTANCE hInstance, 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 false; +#endif // NEED_UNICODE_CHECK + + + // remember the parameters Windows gave us + wxSetInstance(hInstance); + wxApp::m_nCmdShow = nCmdShow; + + // parse the command line: we can't use pCmdLine in Unicode build so it is + // simpler to never use it at all (this also results in a more correct + // argv[0]) + + // break the command line in words + wxArrayString args; + + const wxChar *cmdLine = ::GetCommandLine(); + if ( cmdLine ) + { + args = wxCmdLineParser::ConvertStringToArgs(cmdLine); + } + +#ifdef __WXWINCE__ + // WinCE doesn't insert the program itself, so do it ourselves. + args.Insert(wxGetFullModuleName(), 0); #endif + wxArgs.Init(args); + + return true; +} + +WXDLLEXPORT bool wxEntryStart(HINSTANCE hInstance, + HINSTANCE WXUNUSED(hPrevInstance), + wxCmdLineArgType WXUNUSED(pCmdLine), + int nCmdShow) +{ + if ( !wxMSWEntryCommon(hInstance, nCmdShow) ) + return false; + + return wxEntryStart(wxArgs.argc, wxArgs.argv); +} + +WXDLLEXPORT int wxEntry(HINSTANCE hInstance, + HINSTANCE WXUNUSED(hPrevInstance), + wxCmdLineArgType WXUNUSED(pCmdLine), + int nCmdShow) +{ + if ( !wxMSWEntryCommon(hInstance, nCmdShow) ) + return -1; + + wxON_BLOCK_EXIT_OBJ0(wxArgs, wxMSWCommandLineArguments::Free); + + return wxEntry(wxArgs.argc, wxArgs.argv); +} + +#endif // wxUSE_GUI && __WXMSW__ + +// ---------------------------------------------------------------------------- +// global HINSTANCE +// ---------------------------------------------------------------------------- + +#if wxUSE_BASE + +HINSTANCE wxhInstance = 0; + +extern "C" HINSTANCE wxGetInstance() +{ + return wxhInstance; +} + +void wxSetInstance(HINSTANCE hInst) +{ + wxhInstance = hInst; +} + +#endif // wxUSE_BASE