dbaccess: fix more memory leaks caused by circular Reference

Followup to 96ae2a3300811897c24cccb20f8c2faf382483df; more overridden
acquire() creating cycles in dbaccess.

(regression from 2660d24a07866e083c5135ea263030f3e3a2e729)

Change-Id: I134343b3afbcd5ee3f71212ec18e551455eaee5b
Reviewed-on: https://gerrit.libreoffice.org/73158
Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>
Tested-by: Michael Stahl <Michael.Stahl@cib.de>

3 files changed, 18 insertions, 13 deletions

diff --git a/dbaccess/source/core/dataaccess/ComponentDefinition.cxx b/dbaccess/source/core/dataaccess/ComponentDefinition.cxx
index 41de9c5f995c..1d0d30e88542 100644
--- a/dbaccess/source/core/dataaccess/ComponentDefinition.cxx
+++ b/dbaccess/source/core/dataaccess/ComponentDefinition.cxx
@@ -157,9 +157,10 @@ Sequence< OUString > SAL_CALL OComponentDefinition::getSupportedServiceNames()
 void SAL_CALL OComponentDefinition::disposing()
 {
     OContentHelper::disposing();
-    if ( m_xColumns.is() )
-        m_xColumns->disposing();
-    m_xColumns.clear();
+    if (m_pColumns)
+    {
+        m_pColumns->disposing();
+    }
     m_xColumnPropertyListener->clear();
     m_xColumnPropertyListener.clear();
 }
@@ -194,7 +195,7 @@ Reference< XNameAccess> OComponentDefinition::getColumns()
     ::osl::MutexGuard aGuard(m_aMutex);
     ::connectivity::checkDisposed(OContentHelper::rBHelper.bDisposed);
 
-    if ( !m_xColumns.is() )
+    if (!m_pColumns)
     {
         std::vector< OUString> aNames;
 
@@ -204,10 +205,11 @@ Reference< XNameAccess> OComponentDefinition::getColumns()
         for (auto const& definition : rDefinition)
             aNames.push_back(definition.first);
 
-        m_xColumns = new OColumns( *this, m_aMutex, true, aNames, this, nullptr, true, false, false );
-        m_xColumns->setParent( *this );
+        m_pColumns.reset(new OColumns(*this, m_aMutex, true, aNames, this, nullptr, true, false, false));
+        m_pColumns->setParent(*this);
     }
-    return m_xColumns.get();
+    // see OCollection::acquire
+    return m_pColumns.get();
 }
 
 OColumn* OComponentDefinition::createColumn(const OUString& _rName) const
diff --git a/dbaccess/source/core/dataaccess/ComponentDefinition.hxx b/dbaccess/source/core/dataaccess/ComponentDefinition.hxx
index d43ae556ec17..e71b5fe535a9 100644
--- a/dbaccess/source/core/dataaccess/ComponentDefinition.hxx
+++ b/dbaccess/source/core/dataaccess/ComponentDefinition.hxx
@@ -84,7 +84,8 @@ class OComponentDefinition  :public OContentHelper
                             ,public OComponentDefinition_BASE
                             ,public ::comphelper::OPropertyArrayUsageHelper< OComponentDefinition >
 {
-    rtl::Reference< OColumns >     m_xColumns;
+    // no Reference! see OCollection::acquire
+    std::unique_ptr<OColumns> m_pColumns;
     rtl::Reference<OColumnPropertyListener> m_xColumnPropertyListener;
     bool                        m_bTable;
 
diff --git a/dbaccess/source/ui/misc/singledoccontroller.cxx b/dbaccess/source/ui/misc/singledoccontroller.cxx
index ca4ae4253f25..87b1ca9b2447 100644
--- a/dbaccess/source/ui/misc/singledoccontroller.cxx
+++ b/dbaccess/source/ui/misc/singledoccontroller.cxx
@@ -39,10 +39,11 @@ namespace dbaui
     // OSingleDocumentController_Data
     struct OSingleDocumentController_Data
     {
-        rtl::Reference< UndoManager >  m_xUndoManager;
+        // no Reference! see UndoManager::acquire
+        std::unique_ptr<UndoManager> m_pUndoManager;
 
         OSingleDocumentController_Data( ::cppu::OWeakObject& i_parent, ::osl::Mutex& i_mutex )
-            :m_xUndoManager( new UndoManager( i_parent, i_mutex ) )
+            : m_pUndoManager(new UndoManager(i_parent, i_mutex))
         {
         }
     };
@@ -62,7 +63,7 @@ namespace dbaui
     {
         OSingleDocumentController_Base::disposing();
         ClearUndoManager();
-        m_pData->m_xUndoManager->disposing();
+        m_pData->m_pUndoManager->disposing();
     }
 
     void OSingleDocumentController::ClearUndoManager()
@@ -72,7 +73,7 @@ namespace dbaui
 
     SfxUndoManager& OSingleDocumentController::GetUndoManager() const
     {
-        return m_pData->m_xUndoManager->GetSfxUndoManager();
+        return m_pData->m_pUndoManager->GetSfxUndoManager();
     }
 
     void OSingleDocumentController::addUndoActionAndInvalidate(std::unique_ptr<SfxUndoAction> _pAction)
@@ -90,7 +91,8 @@ namespace dbaui
 
     Reference< XUndoManager > SAL_CALL OSingleDocumentController::getUndoManager(  )
     {
-        return m_pData->m_xUndoManager.get();
+        // see UndoManager::acquire
+        return m_pData->m_pUndoManager.get();
     }
 
     FeatureState OSingleDocumentController::GetState(sal_uInt16 _nId) const