Applied some of the SGI fixes. Don't know about the

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

diff --git a/src/common/object.cpp b/src/common/object.cpp
index 3e3a612d488dedbd56ce666646560a7bad775658..857d89a0da4d89b4875364b9c0432a8981d9f99d 100644 (file)
--- a/src/common/object.cpp
+++ b/src/common/object.cpp
@@ -44,11 +44,9 @@
     #include "wx/ioswrap.h"
 #endif
 
-#if !USE_SHARED_LIBRARY
-wxClassInfo wxObject::sm_classwxObject((wxChar *) _T("wxObject"), (wxChar *) NULL, (wxChar *) NULL, (int ) sizeof(wxObject), (wxObjectConstructorFn) NULL);
+wxClassInfo wxObject::sm_classwxObject((wxChar *) wxT("wxObject"), (wxChar *) NULL, (wxChar *) NULL, (int ) sizeof(wxObject), (wxObjectConstructorFn) NULL);
 wxClassInfo* wxClassInfo::sm_first = (wxClassInfo *) NULL;
 wxHashTable* wxClassInfo::sm_classTable = (wxHashTable*) NULL;
-#endif
 
 /*
  * wxWindows root object.
@@ -94,7 +92,11 @@ wxObject *wxObject::Clone() const
     return object;
 }
 
+#ifdef __WXDEBUG__
 void wxObject::CopyObject(wxObject& object_dest) const
+#else // !Debug
+void wxObject::CopyObject(wxObject& WXUNUSED(object_dest)) const
+#endif // Debug/!Debug
 {
     wxASSERT(object_dest.GetClassInfo()->IsKindOf(GetClassInfo()));
 }
@@ -134,7 +136,7 @@ void wxObject::operator delete(void* pData, char* /* fileName */, int /* lineNum
 #endif
 
 // Cause problems for VC++ - crashes
-#if !defined(__VISUALC__) && wxUSE_ARRAY_MEMORY_OPERATORS
+#if (!defined(__VISUALC__) && wxUSE_ARRAY_MEMORY_OPERATORS ) || defined(__MWERKS__)
 void * wxObject::operator new[] (size_t size, wxChar * fileName, int lineNum)
 {
     return wxDebugAlloc(size, fileName, lineNum, TRUE, TRUE);
@@ -201,7 +203,7 @@ bool wxClassInfo::IsKindOf(wxClassInfo *info) const
     // PROBABLY NO LONGER TRUE now I've done DLL creation right.
     /*
 #if WXMAKINGDLL
-if (GetClassName() && info->GetClassName() && (strcmp(GetClassName(), info->GetClassName()) == 0))
+if (GetClassName() && info->GetClassName() && (wxStrcmp(GetClassName(), info->GetClassName()) == 0))
 return TRUE;
 #else
      */
@@ -221,6 +223,17 @@ return TRUE;
 // Set pointers to base class(es) to speed up IsKindOf
 void wxClassInfo::InitializeClasses()
 {
+    // using IMPLEMENT_DYNAMIC_CLASS() macro twice (which may happen if you
+    // link any object module twice mistakenly) will break this function
+    // because it will enter an infinite loop and eventually die with "out of
+    // memory" - as this is quite hard to detect if you're unaware of this,
+    // try to do some checks here
+#ifdef __WXDEBUG__
+    // more classes than we'll ever have
+    static const size_t nMaxClasses = 10000;
+    size_t nClass = 0;
+#endif // Debug
+
     wxClassInfo::sm_classTable = new wxHashTable(wxKEY_STRING);
 
     // Index all class infos by their class name
@@ -228,7 +241,15 @@ void wxClassInfo::InitializeClasses()
     while (info)
     {
         if (info->m_className)
+        {
+            wxASSERT_MSG( ++nClass < nMaxClasses,
+                          _T("an infinite loop detected - have you used "
+                            "IMPLEMENT_DYNAMIC_CLASS() twice (may be by "
+                            "linking some object module(s) twice)?") );
+
             sm_classTable->Put(info->m_className, (wxObject *)info);
+        }
+
         info = info->m_next;
     }
 
@@ -271,14 +292,12 @@ wxObject *wxCreateDynamicObject(const wxChar *name)
         }
         return (wxObject*) NULL;
     }
-    return (wxObject*) NULL;
 }
 
 #if wxUSE_SERIAL
 
 #include "wx/serbase.h"
 #include "wx/dynlib.h"
-#include "wx/msgdlg.h"
 
 wxObject* wxCreateStoredObject( wxInputStream &stream )
 {
@@ -351,13 +370,15 @@ void wxObject::Ref(const wxObject& clone)
 
 void wxObject::UnRef()
 {
-    if (m_refData) {
-        assert(m_refData->m_count > 0);
-        --(m_refData->m_count);
-        if (m_refData->m_count == 0)
+    if ( m_refData )
+    {
+        wxASSERT_MSG( m_refData->m_count > 0, _T("invalid ref data count") );
+
+        if ( !--m_refData->m_count )
             delete m_refData;
+
+        m_refData = (wxObjectRefData *) NULL;
     }
-    m_refData = (wxObjectRefData *) NULL;
 }
 
 /*