/////////////////////////////////////////////////////////////////////////////
-// Name: common/init.cpp
+// Name: src/common/init.cpp
// Purpose: initialisation for the library
// Author: Vadim Zeitlin
// Modified by:
#include "wx/wxprec.h"
#ifdef __BORLANDC__
- #pragma hdrstop
+ #pragma hdrstop
#endif //__BORLANDC__
#ifndef WX_PRECOMP
#include "wx/app.h"
- #include "wx/debug.h"
+ #include "wx/filefn.h"
+ #include "wx/log.h"
+ #include "wx/intl.h"
+ #include "wx/module.h"
#endif
-#include "wx/module.h"
+#include "wx/init.h"
+#include "wx/thread.h"
+#include "wx/scopedptr.h"
+#include "wx/except.h"
-// ----------------------------------------------------------------------------
-// global vars
-// ----------------------------------------------------------------------------
-
-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:
+ 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:
- virtual int OnRun() { wxFAIL_MSG(wxT("unreachable")); return 0; }
+ 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
+// ----------------------------------------------------------------------------
+
+// suppress warnings about unused variables
+static inline void Use(void *) { }
+
+#define WX_SUPPRESS_UNUSED_WARN(x) Use(&x)
+
+// ----------------------------------------------------------------------------
+// initialization data
// ----------------------------------------------------------------------------
-static size_t gs_nInitCount = 0;
+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++ )
{
- // already initialized
- return TRUE;
+#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
+// ----------------------------------------------------------------------------
- wxASSERT_MSG( !wxTheApp,
- wxT("either call wxInitialize or create app, not both!") );
+// 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__
- wxClassInfo::InitializeClasses();
+ return true;
+}
+// non customizable initialization done after wxApp creation and initialization
+static bool DoCommonPostInit()
+{
wxModule::RegisterModules();
+
if ( !wxModule::InitializeModules() )
{
- return FALSE;
+ 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;
}
- wxTheApp = new wxConsoleApp;
- if ( !wxTheApp )
+ 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
{
- return FALSE;
+ // 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);
- gs_nInitCount++;
+ if ( gs_initData.nInitCount++ )
+ {
+ // already initialized
+ return true;
+ }
- return TRUE;
+ return wxEntryStart(argc, argv);
}
-void WXDLLEXPORT wxUninitialize()
+#if wxUSE_UNICODE
+bool wxInitialize(int argc, char **argv)
{
- if ( !--gs_nInitCount )
+ wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);
+
+ if ( gs_initData.nInitCount++ )
{
- wxModule::CleanUpModules();
+ // already initialized
+ return true;
+ }
- wxClassInfo::CleanUpClasses();
+ return wxEntryStart(argc, argv);
+}
+#endif // wxUSE_UNICODE
- // delete the application object
- delete wxTheApp;
- wxTheApp = (wxApp *)NULL;
+void wxUninitialize()
+{
+ wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);
+
+ if ( --gs_initData.nInitCount == 0 )
+ {
+ wxEntryCleanup();
}
}
projects / wxWidgets.git / blobdiff