replace double-checked locking patterns with thread safe ...

local statics.

Change-Id: Iab4963a04d15f06e9b1a36079a36d32453e09c8f
Reviewed-on: https://gerrit.libreoffice.org/61538
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

scripting/source/basprov/basprov.cxx

@@ -76,21 +76,13 @@ namespace basprov
 
     static Sequence< OUString > getSupportedServiceNames_BasicProviderImpl()
     {
-        static Sequence< OUString >* pNames = nullptr;
-        if ( !pNames )
-        {
-            ::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
-            if ( !pNames )
-            {
-                static Sequence< OUString > aNames(4);
-                aNames.getArray()[0] = "com.sun.star.script.provider.ScriptProviderForBasic";
-                aNames.getArray()[1] = "com.sun.star.script.provider.LanguageScriptProvider";
-                aNames.getArray()[2] = "com.sun.star.script.provider.ScriptProvider";
-                aNames.getArray()[3] = "com.sun.star.script.browse.BrowseNode";
-                pNames = &aNames;
-            }
-        }
-        return *pNames;
+        static Sequence< OUString > s_Names{
+            "com.sun.star.script.provider.ScriptProviderForBasic",
+            "com.sun.star.script.provider.LanguageScriptProvider",
+            "com.sun.star.script.provider.ScriptProvider",
+            "com.sun.star.script.browse.BrowseNode"};
+
+        return s_Names;
     }
 
 

scripting/source/dlgprov/dlgprov.cxx

@@ -176,18 +176,10 @@ namespace dlgprov
 
 
     ::osl::Mutex& getMutex()
-    {
-        static ::osl::Mutex* s_pMutex = nullptr;
-        if ( !s_pMutex )
-        {
-            ::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
-            if ( !s_pMutex )
     {
         static ::osl::Mutex s_aMutex;
-                s_pMutex = &s_aMutex;
-            }
-        }
-        return *s_pMutex;
+
+        return s_aMutex;
     }
 
 

scripting/source/stringresource/stringresource.cxx

@@ -62,17 +62,9 @@ namespace stringresource
 
 ::osl::Mutex& getMutex()
 {
-    static ::osl::Mutex* s_pMutex = nullptr;
-    if ( !s_pMutex )
-    {
-        ::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
-        if ( !s_pMutex )
-        {
     static ::osl::Mutex s_aMutex;
-            s_pMutex = &s_aMutex;
-        }
-    }
-    return *s_pMutex;
+
+    return s_aMutex;
 }
 
 

sfx2/source/doc/objxtor.cxx

@@ -838,19 +838,9 @@ SfxObjectShell* SfxObjectShell::GetObjectShell()
 
 uno::Sequence< OUString > SfxObjectShell::GetEventNames()
 {
-    static uno::Sequence< OUString >* pEventNameContainer = nullptr;
+    static uno::Sequence< OUString > s_EventNameContainer(rtl::Reference<GlobalEventConfig>(new GlobalEventConfig)->getElementNames());
 
-    if ( !pEventNameContainer )
-    {
-        SolarMutexGuard aGuard;
-        if ( !pEventNameContainer )
-        {
-            static uno::Sequence< OUString > aEventNameContainer = rtl::Reference<GlobalEventConfig>(new GlobalEventConfig)->getElementNames();
-            pEventNameContainer = &aEventNameContainer;
-        }
-    }
-
-    return *pEventNameContainer;
+    return s_EventNameContainer;
 }