X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e90c1d2a19361551eb07778280f22be3e759cf64..7198c3368055d88249a338eb33b21f051f674806:/src/common/init.cpp?ds=inline diff --git a/src/common/init.cpp b/src/common/init.cpp index 1af0b671f5..561b726ccd 100644 --- a/src/common/init.cpp +++ b/src/common/init.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: common/init.cpp +// Name: src/common/init.cpp // Purpose: initialisation for the library // Author: Vadim Zeitlin // Modified by: @@ -17,64 +17,518 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ - #pragma implementation "appbase.h" +#include "wx/wxprec.h" + +#ifdef __BORLANDC__ + #pragma hdrstop +#endif //__BORLANDC__ + +#ifndef WX_PRECOMP + #include "wx/app.h" + #include "wx/filefn.h" + #include "wx/log.h" + #include "wx/intl.h" + #include "wx/module.h" #endif -#include "wx/app.h" -#include "wx/debug.h" +#include "wx/init.h" +#include "wx/thread.h" -// ---------------------------------------------------------------------------- -// global vars -// ---------------------------------------------------------------------------- +#include "wx/scopedptr.h" +#include "wx/except.h" -wxApp * WXDLLEXPORT wxTheApp = NULL; +#if defined(__WXMSW__) + #include "wx/msw/private.h" + #include "wx/msw/msvcrt.h" -wxAppInitializerFunction - wxAppBase::m_appInitFn = (wxAppInitializerFunction)NULL; + #ifdef wxCrtSetDbgFlag + static struct EnableMemLeakChecking + { + EnableMemLeakChecking() + { + // check for memory leaks on program exit (another useful flag + // is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free deallocated + // memory which may be used to simulate low-memory condition) + wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF); + } + } gs_enableLeakChecks; + #endif // wxCrtSetDbgFlag +#endif // __WXMSW__ // ---------------------------------------------------------------------------- // private classes // ---------------------------------------------------------------------------- -class /* no WXDLLEXPORT */ wxConsoleApp : public wxApp +// we need a dummy app object if the user doesn't want to create a real one +class wxDummyConsoleApp : public wxAppConsole +{ +public: + wxDummyConsoleApp() { } + + virtual int OnRun() { wxFAIL_MSG( wxT("unreachable code") ); return 0; } + virtual bool DoYield(bool, long) { return true; } + + wxDECLARE_NO_COPY_CLASS(wxDummyConsoleApp); +}; + +// we need a special kind of auto pointer to wxApp which not only deletes the +// pointer it holds in its dtor but also resets the global application pointer +wxDECLARE_SCOPED_PTR(wxAppConsole, wxAppPtrBase) +wxDEFINE_SCOPED_PTR(wxAppConsole, wxAppPtrBase) + +class wxAppPtr : public wxAppPtrBase { public: - virtual int OnRun() { wxFAIL_MSG(T("unreachable")); return 0; } + wxEXPLICIT wxAppPtr(wxAppConsole *ptr = NULL) : wxAppPtrBase(ptr) { } + ~wxAppPtr() + { + if ( get() ) + { + // the pointer is going to be deleted in the base class dtor, don't + // leave the dangling pointer! + wxApp::SetInstance(NULL); + } + } + + void Set(wxAppConsole *ptr) + { + reset(ptr); + + wxApp::SetInstance(ptr); + } + + wxDECLARE_NO_COPY_CLASS(wxAppPtr); +}; + +// class to ensure that wxAppBase::CleanUp() is called if our Initialize() +// fails +class wxCallAppCleanup +{ +public: + wxCallAppCleanup(wxAppConsole *app) : m_app(app) { } + ~wxCallAppCleanup() { if ( m_app ) m_app->CleanUp(); } + + void Dismiss() { m_app = NULL; } + +private: + wxAppConsole *m_app; }; // ---------------------------------------------------------------------------- -// private vars +// private functions // ---------------------------------------------------------------------------- -static size_t gs_nInitCount = 0; +// suppress warnings about unused variables +static inline void Use(void *) { } + +#define WX_SUPPRESS_UNUSED_WARN(x) Use(&x) + +// ---------------------------------------------------------------------------- +// initialization data +// ---------------------------------------------------------------------------- + +static struct InitData +{ + InitData() + { + nInitCount = 0; + +#if wxUSE_UNICODE + argc = 0; + // argv = NULL; -- not even really needed +#endif // wxUSE_UNICODE + } + + // critical section protecting this struct + wxCRIT_SECT_DECLARE_MEMBER(csInit); + + // number of times wxInitialize() was called minus the number of times + // wxUninitialize() was + size_t nInitCount; + +#if wxUSE_UNICODE + int argc; + + // if we receive the command line arguments as ASCII and have to convert + // them to Unicode ourselves (this is the case under Unix but not Windows, + // for example), we remember the converted argv here because we'll have to + // free it when doing cleanup to avoid memory leaks + wchar_t **argv; +#endif // wxUSE_UNICODE + + wxDECLARE_NO_COPY_CLASS(InitData); +} gs_initData; // ============================================================================ // implementation // ============================================================================ -bool WXDLLEXPORT wxInitialize() +// ---------------------------------------------------------------------------- +// command line arguments ANSI -> Unicode conversion +// ---------------------------------------------------------------------------- + +#if wxUSE_UNICODE + +static void ConvertArgsToUnicode(int argc, char **argv) { - if ( gs_nInitCount++ ) + gs_initData.argv = new wchar_t *[argc + 1]; + int wargc = 0; + for ( int i = 0; i < argc; i++ ) + { +#ifdef __DARWIN__ + wxWCharBuffer buf(wxConvFileName->cMB2WX(argv[i])); +#else + wxWCharBuffer buf(wxConvLocal.cMB2WX(argv[i])); +#endif + if ( !buf ) + { + wxLogWarning(_("Command line argument %d couldn't be converted to Unicode and will be ignored."), + i); + } + else // converted ok + { + gs_initData.argv[wargc++] = wxStrdup(buf); + } + } + + gs_initData.argc = wargc; + gs_initData.argv[wargc] = NULL; +} + +static void FreeConvertedArgs() +{ + if ( gs_initData.argv ) + { + for ( int i = 0; i < gs_initData.argc; i++ ) + { + free(gs_initData.argv[i]); + } + + wxDELETEA(gs_initData.argv); + gs_initData.argc = 0; + } +} + +#endif // wxUSE_UNICODE + +// ---------------------------------------------------------------------------- +// start up +// ---------------------------------------------------------------------------- + +// initialization which is always done (not customizable) before wxApp creation +static bool DoCommonPreInit() +{ +#if wxUSE_LOG + // Reset logging in case we were cleaned up and are being reinitialized. + wxLog::DoCreateOnDemand(); + + // force wxLog to create a log target now: we do it because wxTheApp + // doesn't exist yet so wxLog will create a special log target which is + // safe to use even when the GUI is not available while without this call + // we could create wxApp in wxEntryStart() below, then log an error about + // e.g. failure to establish connection to the X server and wxLog would + // send it to wxLogGui (because wxTheApp does exist already) which, of + // course, can't be used in this case + // + // notice also that this does nothing if the user had set up a custom log + // target before -- which is fine as we want to give him this possibility + // (as it's impossible to override logging by overriding wxAppTraits:: + // CreateLogTarget() before wxApp is created) and we just assume he knows + // what he is doing + wxLog::GetActiveTarget(); +#endif // wxUSE_LOG + +#ifdef __WXMSW__ + // GUI applications obtain HINSTANCE in their WinMain() but we also need to + // initialize the global wxhInstance variable for the console programs as + // they may need it too, so set it here if it wasn't done yet + if ( !wxGetInstance() ) + { + wxSetInstance(::GetModuleHandle(NULL)); + } +#endif // __WXMSW__ + + return true; +} + +// non customizable initialization done after wxApp creation and initialization +static bool DoCommonPostInit() +{ + wxModule::RegisterModules(); + + if ( !wxModule::InitializeModules() ) + { + wxLogError(_("Initialization failed in post init, aborting.")); + return false; + } + + return true; +} + +bool wxEntryStart(int& argc, wxChar **argv) +{ + // do minimal, always necessary, initialization + // -------------------------------------------- + + // initialize wxRTTI + if ( !DoCommonPreInit() ) + return false; + + + // first of all, we need an application object + // ------------------------------------------- + + // the user might have already created it himself somehow + wxAppPtr app(wxTheApp); + if ( !app.get() ) + { + // if not, he might have used IMPLEMENT_APP() to give us a function to + // create it + wxAppInitializerFunction fnCreate = wxApp::GetInitializerFunction(); + + if ( fnCreate ) + { + // he did, try to create the custom wxApp object + app.Set((*fnCreate)()); + } + } + + if ( !app.get() ) + { + // either IMPLEMENT_APP() was not used at all or it failed -- in any + // case we still need something + app.Set(new wxDummyConsoleApp); + } + + + // wxApp initialization: this can be customized + // -------------------------------------------- + + if ( !app->Initialize(argc, argv) ) + return false; + + // remember, possibly modified (e.g. due to removal of toolkit-specific + // parameters), command line arguments in member variables + app->argc = argc; + app->argv = argv; + + wxCallAppCleanup callAppCleanup(app.get()); + + + // common initialization after wxTheApp creation + // --------------------------------------------- + + if ( !DoCommonPostInit() ) + return false; + + + // prevent the smart pointer from destroying its contents + app.release(); + + // and the cleanup object from doing cleanup + callAppCleanup.Dismiss(); + +#if wxUSE_LOG + // now that we have a valid wxApp (wxLogGui would have crashed if we used + // it before now), we can delete the temporary sink we had created for the + // initialization messages -- the next time logging function is called, the + // sink will be recreated but this time wxAppTraits will be used + delete wxLog::SetActiveTarget(NULL); +#endif // wxUSE_LOG + + return true; +} + +#if wxUSE_UNICODE + +// we provide a wxEntryStart() wrapper taking "char *" pointer too +bool wxEntryStart(int& argc, char **argv) +{ + ConvertArgsToUnicode(argc, argv); + + if ( !wxEntryStart(gs_initData.argc, gs_initData.argv) ) + { + FreeConvertedArgs(); + + return false; + } + + return true; +} + +#endif // wxUSE_UNICODE + +// ---------------------------------------------------------------------------- +// clean up +// ---------------------------------------------------------------------------- + +// cleanup done before destroying wxTheApp +static void DoCommonPreCleanup() +{ +#if wxUSE_LOG + // flush the logged messages if any and don't use the current probably + // unsafe log target any more: the default one (wxLogGui) can't be used + // after the resources are freed which happens when we return and the user + // supplied one might be even more unsafe (using any wxWidgets GUI function + // is unsafe starting from now) + // + // notice that wxLog will still recreate a default log target if any + // messages are logged but that one will be safe to use until the very end + delete wxLog::SetActiveTarget(NULL); +#endif // wxUSE_LOG +} + +// cleanup done after destroying wxTheApp +static void DoCommonPostCleanup() +{ + wxModule::CleanUpModules(); + + // we can't do this in wxApp itself because it doesn't know if argv had + // been allocated +#if wxUSE_UNICODE + FreeConvertedArgs(); +#endif // wxUSE_UNICODE + + // use Set(NULL) and not Get() to avoid creating a message output object on + // demand when we just want to delete it + delete wxMessageOutput::Set(NULL); + +#if wxUSE_LOG + // and now delete the last logger as well + // + // we still don't disable log target auto-vivification even if any log + // objects created now will result in memory leaks because it seems better + // to leak memory which doesn't matter much considering the application is + // exiting anyhow than to not show messages which could still be logged + // from the user code (e.g. static dtors and such) + delete wxLog::SetActiveTarget(NULL); +#endif // wxUSE_LOG +} + +void wxEntryCleanup() +{ + DoCommonPreCleanup(); + + + // delete the application object + if ( wxTheApp ) + { + wxTheApp->CleanUp(); + + // reset the global pointer to it to NULL before destroying it as in + // some circumstances this can result in executing the code using + // wxTheApp and using half-destroyed object is no good + wxAppConsole * const app = wxApp::GetInstance(); + wxApp::SetInstance(NULL); + delete app; + } + + + DoCommonPostCleanup(); +} + +// ---------------------------------------------------------------------------- +// wxEntry +// ---------------------------------------------------------------------------- + +// for MSW the real wxEntry is defined in msw/main.cpp +#ifndef __WXMSW__ + #define wxEntryReal wxEntry +#endif // !__WXMSW__ + +int wxEntryReal(int& argc, wxChar **argv) +{ + // library initialization + wxInitializer initializer(argc, argv); + + if ( !initializer.IsOk() ) + { +#if wxUSE_LOG + // flush any log messages explaining why we failed + delete wxLog::SetActiveTarget(NULL); +#endif + return -1; + } + + wxTRY + { + // app initialization + if ( !wxTheApp->CallOnInit() ) + { + // don't call OnExit() if OnInit() failed + return -1; + } + + // ensure that OnExit() is called if OnInit() had succeeded + class CallOnExit + { + public: + ~CallOnExit() { wxTheApp->OnExit(); } + } callOnExit; + + WX_SUPPRESS_UNUSED_WARN(callOnExit); + + // app execution + return wxTheApp->OnRun(); + } + wxCATCH_ALL( wxTheApp->OnUnhandledException(); return -1; ) +} + +#if wxUSE_UNICODE + +// as with wxEntryStart, we provide an ANSI wrapper +int wxEntry(int& argc, char **argv) +{ + ConvertArgsToUnicode(argc, argv); + + return wxEntry(gs_initData.argc, gs_initData.argv); +} + +#endif // wxUSE_UNICODE + +// ---------------------------------------------------------------------------- +// wxInitialize/wxUninitialize +// ---------------------------------------------------------------------------- + +bool wxInitialize() +{ + return wxInitialize(0, (wxChar**)NULL); +} + +bool wxInitialize(int argc, wxChar **argv) +{ + wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit); + + if ( gs_initData.nInitCount++ ) { // already initialized - return TRUE; + return true; } - wxASSERT_MSG( !wxTheApp, - T("either call wxInitialize or create app, not both!") ); + return wxEntryStart(argc, argv); +} + +#if wxUSE_UNICODE +bool wxInitialize(int argc, char **argv) +{ + wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit); - wxTheApp = new wxConsoleApp; + if ( gs_initData.nInitCount++ ) + { + // already initialized + return true; + } - return wxTheApp != NULL; + return wxEntryStart(argc, argv); } +#endif // wxUSE_UNICODE -void WXDLLEXPORT wxUninitialize() +void wxUninitialize() { - if ( !--gs_nInitCount ) + wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit); + + if ( --gs_initData.nInitCount == 0 ) { - // delete the application object - delete wxTheApp; - wxTheApp = (wxApp *)NULL; + wxEntryCleanup(); } }