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fix for IBM xlC 8, it can't compile Clone() if wxDataFormat is not defined
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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/common/init.cpp
3 // Purpose: initialisation for the library
4 // Author: Vadim Zeitlin
5 // Modified by:
6 // Created: 04.10.99
7 // RCS-ID: $Id$
8 // Copyright: (c) Vadim Zeitlin
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ============================================================================
13 // declarations
14 // ============================================================================
15
16 // ----------------------------------------------------------------------------
17 // headers
18 // ----------------------------------------------------------------------------
19
20 #include "wx/wxprec.h"
21
22 #ifdef __BORLANDC__
23 #pragma hdrstop
24 #endif //__BORLANDC__
25
26 #ifndef WX_PRECOMP
27 #include "wx/app.h"
28 #include "wx/filefn.h"
29 #include "wx/log.h"
30 #include "wx/intl.h"
31 #include "wx/module.h"
32 #endif
33
34 #include "wx/init.h"
35 #include "wx/thread.h"
36
37 #include "wx/scopedptr.h"
38 #include "wx/except.h"
39
40 #if defined(__WXMSW__) && defined(__WXDEBUG__)
41 #include "wx/msw/msvcrt.h"
42
43 static struct EnableMemLeakChecking
44 {
45 EnableMemLeakChecking()
46 {
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);
51 }
52 } gs_enableLeakChecks;
53 #endif // __WXMSW__ && __WXDEBUG__
54
55 // ----------------------------------------------------------------------------
56 // private classes
57 // ----------------------------------------------------------------------------
58
59 // we need a dummy app object if the user doesn't want to create a real one
60 class wxDummyConsoleApp : public wxAppConsole
61 {
62 public:
63 wxDummyConsoleApp() { }
64
65 virtual int OnRun() { wxFAIL_MSG( _T("unreachable code") ); return 0; }
66 virtual bool DoYield(bool, long) { return true; }
67
68 wxDECLARE_NO_COPY_CLASS(wxDummyConsoleApp);
69 };
70
71 // we need a special kind of auto pointer to wxApp which not only deletes the
72 // pointer it holds in its dtor but also resets the global application pointer
73 wxDECLARE_SCOPED_PTR(wxAppConsole, wxAppPtrBase)
74 wxDEFINE_SCOPED_PTR(wxAppConsole, wxAppPtrBase)
75
76 class wxAppPtr : public wxAppPtrBase
77 {
78 public:
79 wxEXPLICIT wxAppPtr(wxAppConsole *ptr = NULL) : wxAppPtrBase(ptr) { }
80 ~wxAppPtr()
81 {
82 if ( get() )
83 {
84 // the pointer is going to be deleted in the base class dtor, don't
85 // leave the dangling pointer!
86 wxApp::SetInstance(NULL);
87 }
88 }
89
90 void Set(wxAppConsole *ptr)
91 {
92 reset(ptr);
93
94 wxApp::SetInstance(ptr);
95 }
96
97 wxDECLARE_NO_COPY_CLASS(wxAppPtr);
98 };
99
100 // class to ensure that wxAppBase::CleanUp() is called if our Initialize()
101 // fails
102 class wxCallAppCleanup
103 {
104 public:
105 wxCallAppCleanup(wxAppConsole *app) : m_app(app) { }
106 ~wxCallAppCleanup() { if ( m_app ) m_app->CleanUp(); }
107
108 void Dismiss() { m_app = NULL; }
109
110 private:
111 wxAppConsole *m_app;
112 };
113
114 // another tiny class which simply exists to ensure that wxEntryCleanup is
115 // always called
116 class wxCleanupOnExit
117 {
118 public:
119 ~wxCleanupOnExit() { wxEntryCleanup(); }
120 };
121
122 // ----------------------------------------------------------------------------
123 // private functions
124 // ----------------------------------------------------------------------------
125
126 // suppress warnings about unused variables
127 static inline void Use(void *) { }
128
129 #define WX_SUPPRESS_UNUSED_WARN(x) Use(&x)
130
131 // ----------------------------------------------------------------------------
132 // initialization data
133 // ----------------------------------------------------------------------------
134
135 static struct InitData
136 {
137 InitData()
138 {
139 nInitCount = 0;
140
141 #if wxUSE_UNICODE
142 argc = 0;
143 // argv = NULL; -- not even really needed
144 #endif // wxUSE_UNICODE
145 }
146
147 // critical section protecting this struct
148 wxCRIT_SECT_DECLARE_MEMBER(csInit);
149
150 // number of times wxInitialize() was called minus the number of times
151 // wxUninitialize() was
152 size_t nInitCount;
153
154 #if wxUSE_UNICODE
155 int argc;
156
157 // if we receive the command line arguments as ASCII and have to convert
158 // them to Unicode ourselves (this is the case under Unix but not Windows,
159 // for example), we remember the converted argv here because we'll have to
160 // free it when doing cleanup to avoid memory leaks
161 wchar_t **argv;
162 #endif // wxUSE_UNICODE
163
164 wxDECLARE_NO_COPY_CLASS(InitData);
165 } gs_initData;
166
167 // ============================================================================
168 // implementation
169 // ============================================================================
170
171 // ----------------------------------------------------------------------------
172 // command line arguments ANSI -> Unicode conversion
173 // ----------------------------------------------------------------------------
174
175 #if wxUSE_UNICODE
176
177 static void ConvertArgsToUnicode(int argc, char **argv)
178 {
179 gs_initData.argv = new wchar_t *[argc + 1];
180 int wargc = 0;
181 for ( int i = 0; i < argc; i++ )
182 {
183 #ifdef __DARWIN__
184 wxWCharBuffer buf(wxConvFileName->cMB2WX(argv[i]));
185 #else
186 wxWCharBuffer buf(wxConvLocal.cMB2WX(argv[i]));
187 #endif
188 if ( !buf )
189 {
190 wxLogWarning(_("Command line argument %d couldn't be converted to Unicode and will be ignored."),
191 i);
192 }
193 else // converted ok
194 {
195 gs_initData.argv[wargc++] = wxStrdup(buf);
196 }
197 }
198
199 gs_initData.argc = wargc;
200 gs_initData.argv[wargc] = NULL;
201 }
202
203 static void FreeConvertedArgs()
204 {
205 if ( gs_initData.argv )
206 {
207 for ( int i = 0; i < gs_initData.argc; i++ )
208 {
209 free(gs_initData.argv[i]);
210 }
211
212 delete [] gs_initData.argv;
213 gs_initData.argv = NULL;
214 gs_initData.argc = 0;
215 }
216 }
217
218 #endif // wxUSE_UNICODE
219
220 // ----------------------------------------------------------------------------
221 // start up
222 // ----------------------------------------------------------------------------
223
224 // initialization which is always done (not customizable) before wxApp creation
225 static bool DoCommonPreInit()
226 {
227 #if wxUSE_LOG
228 // Reset logging in case we were cleaned up and are being reinitialized.
229 wxLog::DoCreateOnDemand();
230
231 // install temporary log sink: we can't use wxLogGui before wxApp is
232 // constructed and if we use wxLogStderr, all messages during
233 // initialization simply disappear under Windows
234 //
235 // note that we will delete this log target below
236 delete wxLog::SetActiveTarget(new wxLogBuffer);
237 #endif // wxUSE_LOG
238
239 return true;
240 }
241
242 // non customizable initialization done after wxApp creation and initialization
243 static bool DoCommonPostInit()
244 {
245 wxModule::RegisterModules();
246
247 if ( !wxModule::InitializeModules() )
248 {
249 wxLogError(_("Initialization failed in post init, aborting."));
250 return false;
251 }
252
253 #if defined(__WXDEBUG__)
254 // check if event classes implement Clone() correctly
255 // NOTE: the check is done against _all_ event classes which are linked to
256 // the executable currently running, which are not necessarily all
257 // wxWidgets event classes.
258 const wxClassInfo *ci = wxClassInfo::GetFirst();
259 for (; ci; ci = ci->GetNext())
260 {
261 // is this class derived from wxEvent?
262 if (!ci->IsKindOf(CLASSINFO(wxEvent)) || wxString(ci->GetClassName()) == "wxEvent")
263 continue;
264
265 if (!ci->IsDynamic())
266 {
267 wxLogWarning("The event class '%s' should have a DECLARE_DYNAMIC_CLASS macro!",
268 ci->GetClassName());
269 continue;
270 }
271
272 // yes; test if it implements Clone() correctly
273 wxEvent* test = wxDynamicCast(ci->CreateObject(),wxEvent);
274 if (test == NULL)
275 {
276 wxLogWarning("The event class '%s' should have a DECLARE_DYNAMIC_CLASS macro!",
277 ci->GetClassName());
278 continue;
279 }
280
281 wxEvent* cloned = test->Clone();
282 if (!cloned || cloned->GetClassInfo() != ci)
283 wxLogWarning("The event class '%s' does not correctly implement Clone()!",
284 ci->GetClassName());
285
286 delete cloned;
287 delete test;
288 }
289 #endif
290
291 return true;
292 }
293
294 bool wxEntryStart(int& argc, wxChar **argv)
295 {
296 // do minimal, always necessary, initialization
297 // --------------------------------------------
298
299 // initialize wxRTTI
300 if ( !DoCommonPreInit() )
301 {
302 return false;
303 }
304
305
306 // first of all, we need an application object
307 // -------------------------------------------
308
309 // the user might have already created it himself somehow
310 wxAppPtr app(wxTheApp);
311 if ( !app.get() )
312 {
313 // if not, he might have used IMPLEMENT_APP() to give us a function to
314 // create it
315 wxAppInitializerFunction fnCreate = wxApp::GetInitializerFunction();
316
317 if ( fnCreate )
318 {
319 // he did, try to create the custom wxApp object
320 app.Set((*fnCreate)());
321 }
322 }
323
324 if ( !app.get() )
325 {
326 // either IMPLEMENT_APP() was not used at all or it failed -- in any
327 // case we still need something
328 app.Set(new wxDummyConsoleApp);
329 }
330
331
332 // wxApp initialization: this can be customized
333 // --------------------------------------------
334
335 if ( !app->Initialize(argc, argv) )
336 {
337 return false;
338 }
339
340 // remember, possibly modified (e.g. due to removal of toolkit-specific
341 // parameters), command line arguments in member variables
342 app->argc = argc;
343 app->argv = argv;
344
345
346 wxCallAppCleanup callAppCleanup(app.get());
347
348 // for compatibility call the old initialization function too
349 if ( !app->OnInitGui() )
350 return false;
351
352
353 // common initialization after wxTheApp creation
354 // ---------------------------------------------
355
356 if ( !DoCommonPostInit() )
357 return false;
358
359
360 // prevent the smart pointer from destroying its contents
361 app.release();
362
363 // and the cleanup object from doing cleanup
364 callAppCleanup.Dismiss();
365
366 #if wxUSE_LOG
367 // now that we have a valid wxApp (wxLogGui would have crashed if we used
368 // it before now), we can delete the temporary sink we had created for the
369 // initialization messages -- the next time logging function is called, the
370 // sink will be recreated but this time wxAppTraits will be used
371 delete wxLog::SetActiveTarget(NULL);
372 #endif // wxUSE_LOG
373
374 return true;
375 }
376
377 #if wxUSE_UNICODE
378
379 // we provide a wxEntryStart() wrapper taking "char *" pointer too
380 bool wxEntryStart(int& argc, char **argv)
381 {
382 ConvertArgsToUnicode(argc, argv);
383
384 if ( !wxEntryStart(gs_initData.argc, gs_initData.argv) )
385 {
386 FreeConvertedArgs();
387
388 return false;
389 }
390
391 return true;
392 }
393
394 #endif // wxUSE_UNICODE
395
396 // ----------------------------------------------------------------------------
397 // clean up
398 // ----------------------------------------------------------------------------
399
400 // cleanup done before destroying wxTheApp
401 static void DoCommonPreCleanup()
402 {
403 #if wxUSE_LOG
404 // flush the logged messages if any and install a 'safer' log target: the
405 // default one (wxLogGui) can't be used after the resources are freed just
406 // below and the user supplied one might be even more unsafe (using any
407 // wxWidgets GUI function is unsafe starting from now)
408 wxLog::DontCreateOnDemand();
409
410 // this will flush the old messages if any
411 delete wxLog::SetActiveTarget(new wxLogStderr);
412 #endif // wxUSE_LOG
413 }
414
415 // cleanup done after destroying wxTheApp
416 static void DoCommonPostCleanup()
417 {
418 wxModule::CleanUpModules();
419
420 // we can't do this in wxApp itself because it doesn't know if argv had
421 // been allocated
422 #if wxUSE_UNICODE
423 FreeConvertedArgs();
424 #endif // wxUSE_UNICODE
425
426 // use Set(NULL) and not Get() to avoid creating a message output object on
427 // demand when we just want to delete it
428 delete wxMessageOutput::Set(NULL);
429
430 #if wxUSE_LOG
431 // and now delete the last logger as well
432 delete wxLog::SetActiveTarget(NULL);
433 #endif // wxUSE_LOG
434 }
435
436 void wxEntryCleanup()
437 {
438 DoCommonPreCleanup();
439
440
441 // delete the application object
442 if ( wxTheApp )
443 {
444 wxTheApp->CleanUp();
445
446 // reset the global pointer to it to NULL before destroying it as in
447 // some circumstances this can result in executing the code using
448 // wxTheApp and using half-destroyed object is no good
449 wxAppConsole * const app = wxApp::GetInstance();
450 wxApp::SetInstance(NULL);
451 delete app;
452 }
453
454
455 DoCommonPostCleanup();
456 }
457
458 // ----------------------------------------------------------------------------
459 // wxEntry
460 // ----------------------------------------------------------------------------
461
462 // for MSW the real wxEntry is defined in msw/main.cpp
463 #ifndef __WXMSW__
464 #define wxEntryReal wxEntry
465 #endif // !__WXMSW__
466
467 int wxEntryReal(int& argc, wxChar **argv)
468 {
469 // library initialization
470 if ( !wxEntryStart(argc, argv) )
471 {
472 #if wxUSE_LOG
473 // flush any log messages explaining why we failed
474 delete wxLog::SetActiveTarget(NULL);
475 #endif
476 return -1;
477 }
478
479 // if wxEntryStart succeeded, we must call wxEntryCleanup even if the code
480 // below returns or throws
481 wxCleanupOnExit cleanupOnExit;
482
483 WX_SUPPRESS_UNUSED_WARN(cleanupOnExit);
484
485 wxTRY
486 {
487
488 // app initialization
489 if ( !wxTheApp->CallOnInit() )
490 {
491 // don't call OnExit() if OnInit() failed
492 return -1;
493 }
494
495 // ensure that OnExit() is called if OnInit() had succeeded
496 class CallOnExit
497 {
498 public:
499 ~CallOnExit() { wxTheApp->OnExit(); }
500 } callOnExit;
501
502 WX_SUPPRESS_UNUSED_WARN(callOnExit);
503
504 // app execution
505 return wxTheApp->OnRun();
506 }
507 wxCATCH_ALL( wxTheApp->OnUnhandledException(); return -1; )
508 }
509
510 #if wxUSE_UNICODE
511
512 // as with wxEntryStart, we provide an ANSI wrapper
513 int wxEntry(int& argc, char **argv)
514 {
515 ConvertArgsToUnicode(argc, argv);
516
517 return wxEntry(gs_initData.argc, gs_initData.argv);
518 }
519
520 #endif // wxUSE_UNICODE
521
522 // ----------------------------------------------------------------------------
523 // wxInitialize/wxUninitialize
524 // ----------------------------------------------------------------------------
525
526 bool wxInitialize(int argc, wxChar **argv)
527 {
528 wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);
529
530 if ( gs_initData.nInitCount++ )
531 {
532 // already initialized
533 return true;
534 }
535
536 return wxEntryStart(argc, argv);
537 }
538
539 void wxUninitialize()
540 {
541 wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);
542
543 if ( --gs_initData.nInitCount == 0 )
544 {
545 wxEntryCleanup();
546 }
547 }