/////////////////////////////////////////////////////////////////////////////
-// 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 <windows.h>
+#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"
-// May wish not to have a DllMain or WinMain, e.g. if we're programming
-// a Netscape plugin.
-#ifndef NOMAIN
+#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__
+
+#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
+// ============================================================================
-#if defined(__TWIN32__) || defined(__WXWINE__)
+#if wxUSE_BASE
-extern "C"
-BOOL PASCAL WinMain(HANDLE hInstance, HANDLE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
+#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
-#else
+ // 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
-#ifdef __WATCOMC__
-int PASCAL
-#else
-int APIENTRY
-#endif
+ // note that the SE translator must be called wxSETranslator!
+ #define DisableAutomaticSETranslator() _set_se_translator(wxSETranslator)
+#else // !__VISUALC__
+ #define DisableAutomaticSETranslator()
+#endif // __VISUALC__/!__VISUALC__
- WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
-#endif
-// __TWIN32__
+// ----------------------------------------------------------------------------
+// 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
+// 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 DLL_PROCESS_DETACH:
- default:
- break;
- }
- return TRUE;
+ 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__
+
+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
+
+#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
+ }
+
+ 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
projects / wxWidgets.git / blobdiff