void wxObject::Ref(const wxObject& clone)
{
#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
- DEBUG_PRINTF(wxObject::Ref)
+ DEBUG_PRINTF(wxObject::Ref)
#endif
// delete reference to old data
UnRef();
// reference new data
- if( clone.m_refData )
+ if ( clone.m_refData )
{
m_refData = clone.m_refData;
++(m_refData->m_count);
void wxObject::UnRef()
{
- if( m_refData )
+ 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 = 0;
+ m_refData = NULL;
}
}
+void wxObject::AllocExclusive()
+{
+ if ( !m_refData )
+ {
+ m_refData = CreateRefData();
+ }
+ else if ( m_refData->GetRefCount() > 1 )
+ {
+ // note that ref is not going to be destroyed in this case
+ wxObjectRefData* ref = m_refData;
+ UnRef();
+
+ // ... so we can still access it
+ m_refData = CloneRefData(ref);
+ }
+ //else: ref count is 1, we are exclusive owners of m_refData anyhow
+
+ wxASSERT_MSG( m_refData && m_refData->GetRefCount() == 1,
+ _T("wxObject::AllocExclusive() failed.") );
+}
+
+wxObjectRefData *wxObject::CreateRefData() const
+{
+ return NULL;
+}
+
+wxObjectRefData *wxObject::CloneRefData(wxObjectRefData * WXUNUSED(data)) const
+{
+ return NULL;
+}
+
+// ----------------------------------------------------------------------------
+// misc
+// ----------------------------------------------------------------------------
#if defined(__DARWIN__) && defined(DYLIB_INIT)