tdf#89329: use shared_ptr for pImpl in dynamicmenuoptions

Change-Id: I66bdeeee7f70e6ca16a39e8804aaf8a5f0d08205
Reviewed-on: https://gerrit.libreoffice.org/26327Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>

include/unotools/dynamicmenuoptions.hxx

@@ -25,6 +25,7 @@
 #include <com/sun/star/uno/Sequence.h>
 #include <com/sun/star/beans/PropertyValue.hpp>
 #include <unotools/options.hxx>
+#include <memory>
 
 /*-************************************************************************************************************
     @descr          The method GetList() returns a list of property values.
@@ -63,17 +64,6 @@ class SvtDynamicMenuOptions_Impl;
 class SAL_WARN_UNUSED UNOTOOLS_DLLPUBLIC SvtDynamicMenuOptions : public utl::detail::Options
 {
     public:
-        /*-****************************************************************************************************
-            @short      standard constructor and destructor
-            @descr      This will initialize an instance with default values.
-                        We implement these class with a refcount mechanism! Every instance of this class increase it
-                        at create and decrease it at delete time - but all instances use the same data container!
-                        He is implemented as a static member ...
-
-            @seealso    member m_nRefCount
-            @seealso    member m_pDataContainer
-        *//*-*****************************************************************************************************/
-
          SvtDynamicMenuOptions();
         virtual ~SvtDynamicMenuOptions();
 
@@ -101,17 +91,7 @@ class SAL_WARN_UNUSED UNOTOOLS_DLLPUBLIC SvtDynamicMenuOptions : public utl::det
         UNOTOOLS_DLLPRIVATE static ::osl::Mutex& GetOwnStaticMutex();
 
     private:
-
-        /*Attention
-
-            Don't initialize these static members in these headers!
-            a) Double defined symbols will be detected ...
-            b) and unresolved externals exist at linking time.
-            Do it in your source only.
-         */
-
-        static SvtDynamicMenuOptions_Impl* m_pDataContainer;
-        static sal_Int32             m_nRefCount;
+        std::shared_ptr<SvtDynamicMenuOptions_Impl> m_pImpl;
 
 };      // class SvtDynamicMenuOptions
 

unotools/source/config/dynamicmenuoptions.cxx

@@ -566,44 +566,31 @@ void SvtDynamicMenuOptions_Impl::impl_SortAndExpandPropertyNames( const Sequence
     }
 }
 
-//  initialize static member
-//  DON'T DO IT IN YOUR HEADER!
-//  see definition for further information
-
-SvtDynamicMenuOptions_Impl*     SvtDynamicMenuOptions::m_pDataContainer = nullptr;
-sal_Int32                       SvtDynamicMenuOptions::m_nRefCount      = 0;
-
-//  constructor
+namespace {
+    // global
+    std::weak_ptr<SvtDynamicMenuOptions_Impl> g_pDynamicMenuOptions;
+}
 
 SvtDynamicMenuOptions::SvtDynamicMenuOptions()
 {
     // Global access, must be guarded (multithreading!).
     MutexGuard aGuard( GetOwnStaticMutex() );
-    // Increase our refcount ...
-    ++m_nRefCount;
-    // ... and initialize our data container only if it not already exist!
-    if( m_pDataContainer == nullptr )
+
+    m_pImpl = g_pDynamicMenuOptions.lock();
+    if( !m_pImpl )
     {
-        m_pDataContainer = new SvtDynamicMenuOptions_Impl;
+        m_pImpl = std::make_shared<SvtDynamicMenuOptions_Impl>();
+        g_pDynamicMenuOptions = m_pImpl;
         ItemHolder1::holdConfigItem(E_DYNAMICMENUOPTIONS);
     }
 }
 
-//  destructor
-
 SvtDynamicMenuOptions::~SvtDynamicMenuOptions()
 {
     // Global access, must be guarded (multithreading!)
     MutexGuard aGuard( GetOwnStaticMutex() );
-    // Decrease our refcount.
-    --m_nRefCount;
-    // If last instance was deleted ...
-    // we must destroy our static data container!
-    if( m_nRefCount <= 0 )
-    {
-        delete m_pDataContainer;
-        m_pDataContainer = nullptr;
-    }
+
+    m_pImpl.reset();
 }
 
 //  public method
@@ -611,7 +598,7 @@ SvtDynamicMenuOptions::~SvtDynamicMenuOptions()
 Sequence< Sequence< PropertyValue > > SvtDynamicMenuOptions::GetMenu( EDynamicMenuType eMenu ) const
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    return m_pDataContainer->GetMenu( eMenu );
+    return m_pImpl->GetMenu( eMenu );
 }
 
 namespace