fix memory leak in wxScreenDC, fixes #13249

[wxWidgets.git] / src / common / init.cpp

diff --git a/src/common/init.cpp b/src/common/init.cpp
index a183c256f21c3af6120e9a1e9aab1d909d2aa504..561b726ccd2cc0743a1c8886b4922299818febdf 100644 (file)
--- a/src/common/init.cpp
+++ b/src/common/init.cpp
@@ -38,6 +38,7 @@
 #include "wx/except.h"
 
 #if defined(__WXMSW__)
 #include "wx/except.h"
 
 #if defined(__WXMSW__)

+    #include "wx/msw/private.h"

     #include "wx/msw/msvcrt.h"
 
     #ifdef wxCrtSetDbgFlag
     #include "wx/msw/msvcrt.h"
 
     #ifdef wxCrtSetDbgFlag


@@ -64,7 +65,7 @@ class wxDummyConsoleApp : public wxAppConsole
 public:
     wxDummyConsoleApp() { }
 
 public:
     wxDummyConsoleApp() { }
 

-    virtual int OnRun() { wxFAIL_MSG( _T("unreachable code") ); return 0; }
+    virtual int OnRun() { wxFAIL_MSG( wxT("unreachable code") ); return 0; }

     virtual bool DoYield(bool, long) { return true; }
 
     wxDECLARE_NO_COPY_CLASS(wxDummyConsoleApp);
     virtual bool DoYield(bool, long) { return true; }
 
     wxDECLARE_NO_COPY_CLASS(wxDummyConsoleApp);


@@ -113,14 +114,6 @@ private:
     wxAppConsole *m_app;
 };
 
     wxAppConsole *m_app;
 };
 

-// another tiny class which simply exists to ensure that wxEntryCleanup is
-// always called
-class wxCleanupOnExit
-{
-public:
-    ~wxCleanupOnExit() { wxEntryCleanup(); }
-};
-

 // ----------------------------------------------------------------------------
 // private functions
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // private functions
 // ----------------------------------------------------------------------------


@@ -211,8 +204,7 @@ static void FreeConvertedArgs()
             free(gs_initData.argv[i]);
         }
 
             free(gs_initData.argv[i]);
         }
 

-        delete [] gs_initData.argv;
-        gs_initData.argv = NULL;
+        wxDELETEA(gs_initData.argv);

         gs_initData.argc = 0;
     }
 }
         gs_initData.argc = 0;
     }
 }


@@ -230,14 +222,32 @@ static bool DoCommonPreInit()
     // Reset logging in case we were cleaned up and are being reinitialized.
     wxLog::DoCreateOnDemand();
 
     // Reset logging in case we were cleaned up and are being reinitialized.
     wxLog::DoCreateOnDemand();
 

-    // install temporary log sink: we can't use wxLogGui before wxApp is
-    // constructed and if we use wxLogStderr, all messages during
-    // initialization simply disappear under Windows
+    // 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

     //
     //

-    // note that we will delete this log target below
-    delete wxLog::SetActiveTarget(new wxLogBuffer);
+    // 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
 
 #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;
 }
 
     return true;
 }
 


@@ -252,44 +262,6 @@ static bool DoCommonPostInit()
         return false;
     }
 
         return false;
     }
 

-#if defined(__WXDEBUG__)
-    // check if event classes implement Clone() correctly
-    // NOTE: the check is done against _all_ event classes which are linked to
-    //       the executable currently running, which are not necessarily all
-    //       wxWidgets event classes.
-    const wxClassInfo *ci = wxClassInfo::GetFirst();
-    for (; ci; ci = ci->GetNext())
-    {
-        // is this class derived from wxEvent?
-        if (!ci->IsKindOf(CLASSINFO(wxEvent)) || wxString(ci->GetClassName()) == "wxEvent")
-            continue;
-
-        if (!ci->IsDynamic())
-        {
-            wxLogWarning("The event class '%s' should have a DECLARE_DYNAMIC_CLASS macro!",
-                         ci->GetClassName());
-            continue;
-        }
-
-        // yes; test if it implements Clone() correctly
-        wxEvent* test = wxDynamicCast(ci->CreateObject(),wxEvent);
-        if (test == NULL)
-        {
-            wxLogWarning("The event class '%s' should have a DECLARE_DYNAMIC_CLASS macro!",
-                         ci->GetClassName());
-            continue;
-        }
-
-        wxEvent* cloned = test->Clone();
-        if (!cloned || cloned->GetClassInfo() != ci)
-            wxLogWarning("The event class '%s' does not correctly implement Clone()!",
-                         ci->GetClassName());
-
-        delete cloned;
-        delete test;
-    }
-#endif
-

     return true;
 }
 
     return true;
 }
 


@@ -394,14 +366,15 @@ bool wxEntryStart(int& argc, char **argv)
 static void DoCommonPreCleanup()
 {
 #if wxUSE_LOG
 static void DoCommonPreCleanup()
 {
 #if wxUSE_LOG

-    // flush the logged messages if any and install a 'safer' log target: the
-    // default one (wxLogGui) can't be used after the resources are freed just
-    // below and the user supplied one might be even more unsafe (using any
-    // wxWidgets GUI function is unsafe starting from now)
-    wxLog::DontCreateOnDemand();
-
-    // this will flush the old messages if any
-    delete wxLog::SetActiveTarget(new wxLogStderr);
+    // 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
 }
 
 #endif // wxUSE_LOG
 }
 


@@ -422,6 +395,12 @@ static void DoCommonPostCleanup()
 
 #if wxUSE_LOG
     // and now delete the last logger as well
 
 #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
 }
     delete wxLog::SetActiveTarget(NULL);
 #endif // wxUSE_LOG
 }


@@ -460,7 +439,9 @@ void wxEntryCleanup()
 int wxEntryReal(int& argc, wxChar **argv)
 {
     // library initialization
 int wxEntryReal(int& argc, wxChar **argv)
 {
     // library initialization

-    if ( !wxEntryStart(argc, argv) )
+    wxInitializer initializer(argc, argv);
+
+    if ( !initializer.IsOk() )

     {
 #if wxUSE_LOG
         // flush any log messages explaining why we failed
     {
 #if wxUSE_LOG
         // flush any log messages explaining why we failed


@@ -469,12 +450,6 @@ int wxEntryReal(int& argc, wxChar **argv)
         return -1;
     }
 
         return -1;
     }
 

-    // if wxEntryStart succeeded, we must call wxEntryCleanup even if the code
-    // below returns or throws
-    wxCleanupOnExit cleanupOnExit;
-
-    WX_SUPPRESS_UNUSED_WARN(cleanupOnExit);
-

     wxTRY
     {
         // app initialization
     wxTRY
     {
         // app initialization


@@ -515,6 +490,11 @@ int wxEntry(int& argc, char **argv)
 // wxInitialize/wxUninitialize
 // ----------------------------------------------------------------------------
 
 // wxInitialize/wxUninitialize
 // ----------------------------------------------------------------------------
 

+bool wxInitialize()
+{
+    return wxInitialize(0, (wxChar**)NULL);
+}
+

 bool wxInitialize(int argc, wxChar **argv)
 {
     wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);
 bool wxInitialize(int argc, wxChar **argv)
 {
     wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);


@@ -528,6 +508,21 @@ bool wxInitialize(int argc, wxChar **argv)
     return wxEntryStart(argc, argv);
 }
 
     return wxEntryStart(argc, argv);
 }
 

+#if wxUSE_UNICODE
+bool wxInitialize(int argc, char **argv)
+{
+    wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);
+
+    if ( gs_initData.nInitCount++ )
+    {
+        // already initialized
+        return true;
+    }
+
+    return wxEntryStart(argc, argv);
+}
+#endif // wxUSE_UNICODE
+

 void wxUninitialize()
 {
     wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);
 void wxUninitialize()
 {
     wxCRIT_SECT_LOCKER(lockInit, gs_initData.csInit);