tdf#89329: use shared_ptr for pImpl in cmdoptions

Change-Id: Ie6297cf8c26964a6c7cc017c1257c61825c2c791
Reviewed-on: https://gerrit.libreoffice.org/26320
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>

2 files changed, 13 insertions, 49 deletions

diff --git a/include/unotools/cmdoptions.hxx b/include/unotools/cmdoptions.hxx
index 8e0b48782f4e..b5d0ad854893 100644
--- a/include/unotools/cmdoptions.hxx
+++ b/include/unotools/cmdoptions.hxx
@@ -25,6 +25,7 @@
 #include <com/sun/star/frame/XFrame.hpp>
 #include <rtl/ustring.hxx>
 #include <unotools/options.hxx>
+#include <memory>
 
 /*-************************************************************************************************************
     @descr          The method GetList() returns a list of property values.
@@ -58,17 +59,6 @@ class SAL_WARN_UNUSED UNOTOOLS_DLLPUBLIC SvtCommandOptions : public utl::detail:
             CMDOPTION_NONE
         };
 
-        /*-****************************************************************************************************
-            @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
-        *//*-*****************************************************************************************************/
-
          SvtCommandOptions();
         virtual ~SvtCommandOptions();
 
@@ -121,17 +111,7 @@ class SAL_WARN_UNUSED UNOTOOLS_DLLPUBLIC SvtCommandOptions : public utl::detail:
         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 SvtCommandOptions_Impl*  m_pDataContainer;
-        static sal_Int32                m_nRefCount;
+        std::shared_ptr<SvtCommandOptions_Impl>  m_pImpl;
 
 };      // class SvtCmdOptions
 
diff --git a/unotools/source/config/cmdoptions.cxx b/unotools/source/config/cmdoptions.cxx
index 82e5a93167d4..0fb89bee6343 100644
--- a/unotools/source/config/cmdoptions.cxx
+++ b/unotools/source/config/cmdoptions.cxx
@@ -286,44 +286,28 @@ Sequence< OUString > SvtCommandOptions_Impl::impl_GetPropertyNames()
     return lDisabledItems;
 }
 
-//  initialize static member
-//  DON'T DO IT IN YOUR HEADER!
-//  see definition for further information
-
-SvtCommandOptions_Impl*     SvtCommandOptions::m_pDataContainer = nullptr;
-sal_Int32                   SvtCommandOptions::m_nRefCount      = 0;
-
-//  constructor
+std::weak_ptr<SvtCommandOptions_Impl> m_pCommandOptions;
 
 SvtCommandOptions::SvtCommandOptions()
 {
     // 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 = m_pCommandOptions.lock();
+    if( !m_pImpl )
     {
-        m_pDataContainer = new SvtCommandOptions_Impl;
+        m_pImpl = std::make_shared<SvtCommandOptions_Impl>();
+        m_pCommandOptions = m_pImpl;
         ItemHolder1::holdConfigItem(E_CMDOPTIONS);
     }
 }
 
-//  destructor
-
 SvtCommandOptions::~SvtCommandOptions()
 {
     // 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
@@ -331,7 +315,7 @@ SvtCommandOptions::~SvtCommandOptions()
 bool SvtCommandOptions::HasEntries( CmdOption eOption ) const
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    return m_pDataContainer->HasEntries( eOption );
+    return m_pImpl->HasEntries( eOption );
 }
 
 //  public method
@@ -339,7 +323,7 @@ bool SvtCommandOptions::HasEntries( CmdOption eOption ) const
 bool SvtCommandOptions::Lookup( CmdOption eCmdOption, const OUString& aCommandURL ) const
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    return m_pDataContainer->Lookup( eCmdOption, aCommandURL );
+    return m_pImpl->Lookup( eCmdOption, aCommandURL );
 }
 
 //  public method
@@ -347,7 +331,7 @@ bool SvtCommandOptions::Lookup( CmdOption eCmdOption, const OUString& aCommandUR
 void SvtCommandOptions::EstablisFrameCallback(const css::uno::Reference< css::frame::XFrame >& xFrame)
 {
     MutexGuard aGuard( GetOwnStaticMutex() );
-    m_pDataContainer->EstablisFrameCallback(xFrame);
+    m_pImpl->EstablisFrameCallback(xFrame);
 }
 
 namespace