1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/common/init.cpp
3 // Purpose: initialisation for the library
4 // Author: Vadim Zeitlin
8 // Copyright: (c) Vadim Zeitlin
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
12 // ============================================================================
14 // ============================================================================
16 // ----------------------------------------------------------------------------
18 // ----------------------------------------------------------------------------
20 #include "wx/wxprec.h"
28 #include "wx/filefn.h"
30 #include "wx/thread.h"
32 #include "wx/module.h"
37 #include "wx/ptr_scpd.h"
38 #include "wx/except.h"
40 #if defined(__WXMSW__) && defined(__WXDEBUG__)
41 #include "wx/msw/msvcrt.h"
43 static struct EnableMemLeakChecking
45 EnableMemLeakChecking()
47 // do check for memory leaks on program exit (another useful flag
48 // is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free deallocated
49 // memory which may be used to simulate low-memory condition)
50 wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
52 } gs_enableLeakChecks;
53 #endif // __WXMSW__ && __WXDEBUG__
55 // ----------------------------------------------------------------------------
57 // ----------------------------------------------------------------------------
59 // we need a dummy app object if the user doesn't want to create a real one
60 class wxDummyConsoleApp : public wxAppConsole
63 wxDummyConsoleApp() { }
65 virtual int OnRun() { wxFAIL_MSG( _T("unreachable code") ); return 0; }
67 DECLARE_NO_COPY_CLASS(wxDummyConsoleApp)
70 // we need a special kind of auto pointer to wxApp which not only deletes the
71 // pointer it holds in its dtor but also resets the global application pointer
72 wxDECLARE_SCOPED_PTR(wxAppConsole, wxAppPtrBase)
73 wxDEFINE_SCOPED_PTR(wxAppConsole, wxAppPtrBase)
75 class wxAppPtr : public wxAppPtrBase
78 wxEXPLICIT wxAppPtr(wxAppConsole *ptr = NULL) : wxAppPtrBase(ptr) { }
83 // the pointer is going to be deleted in the base class dtor, don't
84 // leave the dangling pointer!
85 wxApp::SetInstance(NULL);
89 void Set(wxAppConsole *ptr)
93 wxApp::SetInstance(ptr);
96 DECLARE_NO_COPY_CLASS(wxAppPtr)
99 // class to ensure that wxAppBase::CleanUp() is called if our Initialize()
101 class wxCallAppCleanup
104 wxCallAppCleanup(wxAppConsole *app) : m_app(app) { }
105 ~wxCallAppCleanup() { if ( m_app ) m_app->CleanUp(); }
107 void Dismiss() { m_app = NULL; }
113 // another tiny class which simply exists to ensure that wxEntryCleanup is
115 class wxCleanupOnExit
118 ~wxCleanupOnExit() { wxEntryCleanup(); }
121 // ----------------------------------------------------------------------------
123 // ----------------------------------------------------------------------------
125 // suppress warnings about unused variables
126 static inline void Use(void *) { }
128 #define WX_SUPPRESS_UNUSED_WARN(x) Use(&x)
130 // ----------------------------------------------------------------------------
131 // initialization data
132 // ----------------------------------------------------------------------------
134 static struct InitData
142 // argv = NULL; -- not even really needed
143 #endif // wxUSE_UNICODE
146 // critical section protecting this struct
147 wxCRIT_SECT_DECLARE_MEMBER(csInit);
149 // number of times wxInitialize() was called minus the number of times
150 // wxUninitialize() was
156 // if we receive the command line arguments as ASCII and have to convert
157 // them to Unicode ourselves (this is the case under Unix but not Windows,
158 // for example), we remember the converted argv here because we'll have to
159 // free it when doing cleanup to avoid memory leaks
161 #endif // wxUSE_UNICODE
163 DECLARE_NO_COPY_CLASS(InitData)
166 // ============================================================================
168 // ============================================================================
170 // ----------------------------------------------------------------------------
171 // command line arguments ANSI -> Unicode conversion
172 // ----------------------------------------------------------------------------
176 static void ConvertArgsToUnicode(int argc, char **argv)
178 gs_initData.argv = new wchar_t *[argc + 1];
180 for ( int i = 0; i < argc; i++ )
182 wxWCharBuffer buf(wxConvLocal.cMB2WX(argv[i]));
185 wxLogWarning(_("Command line argument %d couldn't be converted to Unicode and will be ignored."),
190 gs_initData.argv[wargc++] = wxStrdup(buf);
194 gs_initData.argc = wargc;
195 gs_initData.argv[wargc] = NULL;
198 static void FreeConvertedArgs()
200 if ( gs_initData.argv )
202 for ( int i = 0; i < gs_initData.argc; i++ )
204 free(gs_initData.argv[i]);
207 delete [] gs_initData.argv;
208 gs_initData.argv = NULL;
209 gs_initData.argc = 0;
213 #endif // wxUSE_UNICODE
215 // ----------------------------------------------------------------------------
217 // ----------------------------------------------------------------------------
219 // initialization which is always done (not customizable) before wxApp creation
220 static bool DoCommonPreInit()
223 // Reset logging in case we were cleaned up and are being reinitialized.
224 wxLog::DoCreateOnDemand();
226 // install temporary log sink: we can't use wxLogGui before wxApp is
227 // constructed and if we use wxLogStderr, all messages during
228 // initialization simply disappear under Windows
230 // note that we will delete this log target below
231 delete wxLog::SetActiveTarget(new wxLogBuffer);
237 // non customizable initialization done after wxApp creation and initialization
238 static bool DoCommonPostInit()
240 wxModule::RegisterModules();
242 if ( !wxModule::InitializeModules() )
244 wxLogError(_("Initialization failed in post init, aborting."));
251 bool wxEntryStart(int& argc, wxChar **argv)
253 // do minimal, always necessary, initialization
254 // --------------------------------------------
257 if ( !DoCommonPreInit() )
263 // first of all, we need an application object
264 // -------------------------------------------
266 // the user might have already created it himself somehow
267 wxAppPtr app(wxTheApp);
270 // if not, he might have used IMPLEMENT_APP() to give us a function to
272 wxAppInitializerFunction fnCreate = wxApp::GetInitializerFunction();
276 // he did, try to create the custom wxApp object
277 app.Set((*fnCreate)());
283 // either IMPLEMENT_APP() was not used at all or it failed -- in any
284 // case we still need something
285 app.Set(new wxDummyConsoleApp);
289 // wxApp initialization: this can be customized
290 // --------------------------------------------
292 if ( !app->Initialize(argc, argv) )
297 wxCallAppCleanup callAppCleanup(app.get());
299 // for compatibility call the old initialization function too
300 if ( !app->OnInitGui() )
304 // common initialization after wxTheApp creation
305 // ---------------------------------------------
307 if ( !DoCommonPostInit() )
311 // prevent the smart pointer from destroying its contents
314 // and the cleanup object from doing cleanup
315 callAppCleanup.Dismiss();
318 // now that we have a valid wxApp (wxLogGui would have crashed if we used
319 // it before now), we can delete the temporary sink we had created for the
320 // initialization messages -- the next time logging function is called, the
321 // sink will be recreated but this time wxAppTraits will be used
322 delete wxLog::SetActiveTarget(NULL);
330 // we provide a wxEntryStart() wrapper taking "char *" pointer too
331 bool wxEntryStart(int& argc, char **argv)
333 ConvertArgsToUnicode(argc, argv);
335 if ( !wxEntryStart(gs_initData.argc, gs_initData.argv) )
345 #endif // wxUSE_UNICODE
347 // ----------------------------------------------------------------------------
349 // ----------------------------------------------------------------------------
351 // cleanup done before destroying wxTheApp
352 static void DoCommonPreCleanup()
355 // flush the logged messages if any and install a 'safer' log target: the
356 // default one (wxLogGui) can't be used after the resources are freed just
357 // below and the user supplied one might be even more unsafe (using any
358 // wxWidgets GUI function is unsafe starting from now)
359 wxLog::DontCreateOnDemand();
361 // this will flush the old messages if any
362 delete wxLog::SetActiveTarget(new wxLogStderr);
366 // cleanup done after destroying wxTheApp
367 static void DoCommonPostCleanup()
369 wxModule::CleanUpModules();
371 // we can't do this in wxApp itself because it doesn't know if argv had
375 #endif // wxUSE_UNICODE
377 // use Set(NULL) and not Get() to avoid creating a message output object on
378 // demand when we just want to delete it
379 delete wxMessageOutput::Set(NULL);
382 // and now delete the last logger as well
383 delete wxLog::SetActiveTarget(NULL);
387 void wxEntryCleanup()
389 DoCommonPreCleanup();
392 // delete the application object
398 wxApp::SetInstance(NULL);
402 DoCommonPostCleanup();
405 // ----------------------------------------------------------------------------
407 // ----------------------------------------------------------------------------
409 // for MSW the real wxEntry is defined in msw/main.cpp
411 #define wxEntryReal wxEntry
414 int wxEntryReal(int& argc, wxChar **argv)
416 // library initialization
417 if ( !wxEntryStart(argc, argv) )
420 // flush any log messages explaining why we failed
421 delete wxLog::SetActiveTarget(NULL);
426 // if wxEntryStart succeeded, we must call wxEntryCleanup even if the code
427 // below returns or throws
428 wxCleanupOnExit cleanupOnExit;
430 WX_SUPPRESS_UNUSED_WARN(cleanupOnExit);
435 // app initialization
436 if ( !wxTheApp->CallOnInit() )
438 // don't call OnExit() if OnInit() failed
442 // ensure that OnExit() is called if OnInit() had succeeded
446 ~CallOnExit() { wxTheApp->OnExit(); }
449 WX_SUPPRESS_UNUSED_WARN(callOnExit);
452 return wxTheApp->OnRun();
454 wxCATCH_ALL( wxTheApp->OnUnhandledException(); return -1; )
459 // as with wxEntryStart, we provide an ANSI wrapper
460 int wxEntry(int& argc, char **argv)
462 ConvertArgsToUnicode(argc, argv);
464 return wxEntry(gs_initData.argc, gs_initData.argv);
467 #endif // wxUSE_UNICODE
469 // ----------------------------------------------------------------------------
470 // wxInitialize/wxUninitialize
471 // ----------------------------------------------------------------------------
473 bool wxInitialize(int argc, wxChar **argv)
475 wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);
477 if ( gs_initData.nInitCount++ )
479 // already initialized
483 return wxEntryStart(argc, argv);
486 void wxUninitialize()
488 wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);
490 if ( --gs_initData.nInitCount == 0 )