58 

    59 inline ClassLoaderData *ClassLoaderDataGraph::find_or_create(Handle loader) {

    60   guarantee(loader() != NULL && oopDesc::is_oop(loader()), "Loader must be oop");

    61   // Gets the class loader data out of the java/lang/ClassLoader object, if non-null

    62   // it's already in the loader_data, so no need to add

    63   ClassLoaderData* loader_data= java_lang_ClassLoader::loader_data_acquire(loader());

    64   if (loader_data) {

    65      return loader_data;

    66   }

    67   return ClassLoaderDataGraph::add(loader, false);

    68 }

    69 

    70 size_t ClassLoaderDataGraph::num_instance_classes() {

    71   return _num_instance_classes;

    72 }

    73 

    74 size_t ClassLoaderDataGraph::num_array_classes() {

    75   return _num_array_classes;

    76 }

    77 

    78 void ClassLoaderDataGraph::inc_instance_classes(size_t count) {

    79   Atomic::add(count, &_num_instance_classes);

    80 }

    81 

    82 void ClassLoaderDataGraph::dec_instance_classes(size_t count) {

    83   assert(count <= _num_instance_classes, "Sanity");

    84   Atomic::sub(count, &_num_instance_classes);

    85 }

    86 

    87 void ClassLoaderDataGraph::inc_array_classes(size_t count) {

    88   Atomic::add(count, &_num_array_classes);

    89 }

    90 

    91 void ClassLoaderDataGraph::dec_array_classes(size_t count) {

    92   assert(count <= _num_array_classes, "Sanity");

    93   Atomic::sub(count, &_num_array_classes);

    94 }

    95 

    96 bool ClassLoaderDataGraph::should_clean_metaspaces_and_reset() {

    97   // Only clean metaspaces after full GC.

    98   bool do_cleaning = _safepoint_cleanup_needed;

    99 #if INCLUDE_JVMTI

   100   do_cleaning = do_cleaning && (_should_clean_deallocate_lists || InstanceKlass::has_previous_versions());

   101 #else

   102   do_cleaning = do_cleaning && _should_clean_deallocate_lists;

   103 #endif

   104   _safepoint_cleanup_needed = false;  // reset

   105   return do_cleaning;

   106 }

   107