Use SolarMutexGuard instead of pairs of Acquire/ReleaseSolarMutex

Change-Id: I7ff41dd932fd9860dff944b3bf8ff5bdc230ae5d

desktop/source/lib/init.cxx

@@ -466,11 +466,8 @@ static void doc_setPart(LibreOfficeKitDocument* pThis, int nPart)
         return;
     }
 
-    Application::AcquireSolarMutex(1);
-    {
+    SolarMutexGuard aGuard;
     pDoc->setPart( nPart );
-    }
-    Application::ReleaseSolarMutex();
 }
 
 static char* doc_getPartName(LibreOfficeKitDocument* pThis, int nPart)
@@ -504,8 +501,8 @@ static void doc_setPartMode(LibreOfficeKitDocument* pThis,
         return;
     }
 
-    Application::AcquireSolarMutex(1);
-    {
+    SolarMutexGuard aGuard;
+
     int nCurrentPart = pDoc->getPart();
 
     pDoc->setPartMode(ePartMode);
@@ -527,8 +524,6 @@ static void doc_setPartMode(LibreOfficeKitDocument* pThis,
     {
         pDoc->setPart( 0 );
     }
-    }
-    Application::ReleaseSolarMutex();
 }
 
 void doc_paintTile (LibreOfficeKitDocument* pThis,
@@ -550,8 +545,8 @@ void doc_paintTile (LibreOfficeKitDocument* pThis,
         return;
     }
 
-    Application::AcquireSolarMutex(1);
-    {
+    SolarMutexGuard aGuard;
+
 #if defined(UNX) && !defined(MACOSX) && !defined(ENABLE_HEADLESS)
     ImplSVData* pSVData = ImplGetSVData();
     SvpSalInstance* pSalInstance = static_cast< SvpSalInstance* >(pSVData->mpDefInst);
@@ -580,8 +575,6 @@ void doc_paintTile (LibreOfficeKitDocument* pThis,
     (void) nTileWidth;
     (void) nTileHeight;
 #endif
-    }
-    Application::ReleaseSolarMutex();
 }
 
 static void doc_getDocumentSize(LibreOfficeKitDocument* pThis,