X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/807d848702772c7dc59e7a2bb35b2971ad86a64d..2c892c0b0cf6ef67614413c0d927eeefefe63ece:/src/common/object.cpp

diff --git a/src/common/object.cpp b/src/common/object.cpp
index d502615e27..7bf7dbdc11 100644
--- a/src/common/object.cpp
+++ b/src/common/object.cpp
@@ -230,6 +230,10 @@ void wxObject::Ref(const wxObject& clone)
     DEBUG_PRINTF(wxObject::Ref)
 #endif
 
+    // nothing to be done
+    if (m_refData == clone.m_refData)
+        return;
+
     // delete reference to old data
     UnRef();
 
@@ -262,7 +266,7 @@ void wxObject::AllocExclusive()
     else if ( m_refData->GetRefCount() > 1 )
     {
         // note that ref is not going to be destroyed in this case
-        wxObjectRefData* ref = m_refData;
+        const wxObjectRefData* ref = m_refData;
         UnRef();
 
         // ... so we can still access it
@@ -276,11 +280,18 @@ void wxObject::AllocExclusive()
 
 wxObjectRefData *wxObject::CreateRefData() const
 {
+    // if you use AllocExclusive() you must override this method
+    wxFAIL_MSG( _T("CreateRefData() must be overridden if called!") );
+
     return NULL;
 }
 
-wxObjectRefData *wxObject::CloneRefData(wxObjectRefData * WXUNUSED(data)) const
+wxObjectRefData *
+wxObject::CloneRefData(const wxObjectRefData * WXUNUSED(data)) const
 {
+    // if you use AllocExclusive() you must override this method
+    wxFAIL_MSG( _T("CloneRefData() must be overridden if called!") );
+
     return NULL;
 }