tdf#89329: use shared_ptr for pImpl in printwarningoptions

Change-Id: I0b202ae78d2afe5fad4aa4bb4a3323f2672b1b93
Reviewed-on: https://gerrit.libreoffice.org/26321
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>

2 files changed, 18 insertions, 54 deletions

diff --git a/include/unotools/printwarningoptions.hxx b/include/unotools/printwarningoptions.hxx
index 7c425539a6c2..b0f8ef9f2a63 100644
--- a/include/unotools/printwarningoptions.hxx
+++ b/include/unotools/printwarningoptions.hxx
@@ -25,6 +25,7 @@
 #include <osl/mutex.hxx>
 #include <rtl/ustring.hxx>
 #include <unotools/options.hxx>
+#include <memory>
 
 /*-************************************************************************************************************
     @short          forward declaration to our private date container implementation
@@ -43,17 +44,6 @@ class SvtPrintWarningOptions_Impl;
 class SAL_WARN_UNUSED UNOTOOLS_DLLPUBLIC SvtPrintWarningOptions : 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
-        *//*-*****************************************************************************************************/
-
          SvtPrintWarningOptions();
         virtual ~SvtPrintWarningOptions();
 
@@ -86,17 +76,7 @@ class SAL_WARN_UNUSED UNOTOOLS_DLLPUBLIC SvtPrintWarningOptions : public utl::de
         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 SvtPrintWarningOptions_Impl* m_pDataContainer;
-        static sal_Int32                    m_nRefCount;
+        std::shared_ptr<SvtPrintWarningOptions_Impl> m_pImpl;
 
 };      // class SvtPrintWarningOptions
 
diff --git a/unotools/source/config/printwarningoptions.cxx b/unotools/source/config/printwarningoptions.cxx
index 4cc0f26c108a..42b1059759eb 100644
--- a/unotools/source/config/printwarningoptions.cxx
+++ b/unotools/source/config/printwarningoptions.cxx
@@ -221,44 +221,28 @@ Sequence< OUString > SvtPrintWarningOptions_Impl::impl_GetPropertyNames()
     return seqPropertyNames;
 }
 
-//  initialize static member
-//  DON'T DO IT IN YOUR HEADER!
-//  see definition for further information
-
-SvtPrintWarningOptions_Impl*    SvtPrintWarningOptions::m_pDataContainer = nullptr;
-sal_Int32                       SvtPrintWarningOptions::m_nRefCount = 0;
-
-//  constructor
+std::weak_ptr<SvtPrintWarningOptions_Impl> m_pPrintWarningOptions;
 
 SvtPrintWarningOptions::SvtPrintWarningOptions()
 {
     // Global access, must be guarded (multithreading!).
     MutexGuard aGuard( GetOwnStaticMutex() );
-    // Increase our refcount ...
-    ++m_nRefCount;
-    // ... and initialize our data container only if it not already!
-    if( m_pDataContainer == nullptr )
+
+    m_pImpl = m_pPrintWarningOptions.lock();
+    if( !m_pImpl )
     {
-        m_pDataContainer = new SvtPrintWarningOptions_Impl();
+        m_pImpl = std::make_shared<SvtPrintWarningOptions_Impl>();
+        m_pPrintWarningOptions = m_pImpl;
         ItemHolder1::holdConfigItem(E_PRINTWARNINGOPTIONS);
     }
 }
 
-//  destructor
-
 SvtPrintWarningOptions::~SvtPrintWarningOptions()
 {
     // 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
@@ -266,7 +250,7 @@ SvtPrintWarningOptions::~SvtPrintWarningOptions()
 bool SvtPrintWarningOptions::IsPaperSize() const
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    return m_pDataContainer->IsPaperSize();
+    return m_pImpl->IsPaperSize();
 }
 
 //  public method
@@ -274,7 +258,7 @@ bool SvtPrintWarningOptions::IsPaperSize() const
 bool SvtPrintWarningOptions::IsPaperOrientation() const
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    return m_pDataContainer->IsPaperOrientation();
+    return m_pImpl->IsPaperOrientation();
 }
 
 //  public method
@@ -282,7 +266,7 @@ bool SvtPrintWarningOptions::IsPaperOrientation() const
 bool SvtPrintWarningOptions::IsTransparency() const
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    return m_pDataContainer->IsTransparency();
+    return m_pImpl->IsTransparency();
 }
 
 //  public method
@@ -290,7 +274,7 @@ bool SvtPrintWarningOptions::IsTransparency() const
 void SvtPrintWarningOptions::SetPaperSize( bool bState )
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    m_pDataContainer->SetPaperSize( bState );
+    m_pImpl->SetPaperSize( bState );
 }
 
 //  public method
@@ -298,7 +282,7 @@ void SvtPrintWarningOptions::SetPaperSize( bool bState )
 void SvtPrintWarningOptions::SetPaperOrientation( bool bState )
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    m_pDataContainer->SetPaperOrientation( bState );
+    m_pImpl->SetPaperOrientation( bState );
 }
 
 //  public method
@@ -306,19 +290,19 @@ void SvtPrintWarningOptions::SetPaperOrientation( bool bState )
 void SvtPrintWarningOptions::SetTransparency( bool bState )
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    m_pDataContainer->SetTransparency( bState );
+    m_pImpl->SetTransparency( bState );
 }
 
 bool SvtPrintWarningOptions::IsModifyDocumentOnPrintingAllowed() const
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    return m_pDataContainer->IsModifyDocumentOnPrintingAllowed();
+    return m_pImpl->IsModifyDocumentOnPrintingAllowed();
 }
 
 void SvtPrintWarningOptions::SetModifyDocumentOnPrintingAllowed( bool bState )
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    m_pDataContainer->SetModifyDocumentOnPrintingAllowed( bState );
+    m_pImpl->SetModifyDocumentOnPrintingAllowed( bState );
 }
 
 namespace