+clib_error_t *
+stat_segment_register_state_counter (u8 * name, u32 * index)
+{
+ stat_segment_main_t *sm = &stat_segment_main;
+ stat_segment_shared_header_t *shared_header = sm->shared_header;
+ void *oldheap;
+ stat_segment_directory_entry_t e;
+
+ ASSERT (shared_header);
+ ASSERT (vlib_get_thread_index () == 0);
+
+ u32 vector_index = lookup_hash_index (name);
+
+ if (vector_index != STAT_SEGMENT_INDEX_INVALID) /* Already registered */
+ return clib_error_return (0, "%v is already registered", name);
+
+ memset (&e, 0, sizeof (e));
+ e.type = STAT_DIR_TYPE_SCALAR_INDEX;
+ memcpy (e.name, name, vec_len (name));
+
+ oldheap = vlib_stats_push_heap (NULL);
+ vlib_stat_segment_lock ();
+
+ vector_index = vlib_stats_create_counter (&e, oldheap);
+
+ shared_header->directory_offset =
+ stat_segment_offset (shared_header, sm->directory_vector);
+
+ vlib_stat_segment_unlock ();
+ clib_mem_set_heap (oldheap);
+
+ *index = vector_index;
+ return 0;
+}
+
+clib_error_t *
+stat_segment_deregister_state_counter (u32 index)
+{
+ stat_segment_main_t *sm = &stat_segment_main;
+ stat_segment_shared_header_t *shared_header = sm->shared_header;
+ stat_segment_directory_entry_t *e;
+ void *oldheap;
+
+ ASSERT (shared_header);
+
+ if (index > vec_len (sm->directory_vector))
+ return clib_error_return (0, "%u index does not exist", index);
+
+ e = &sm->directory_vector[index];
+ if (e->type != STAT_DIR_TYPE_SCALAR_INDEX)
+ return clib_error_return (0, "%u index cannot be deleted", index);
+
+ oldheap = vlib_stats_push_heap (NULL);
+ vlib_stat_segment_lock ();
+
+ vlib_stats_delete_counter (index, oldheap);
+
+ vlib_stat_segment_unlock ();
+ clib_mem_set_heap (oldheap);
+
+ return 0;
+}
+
+void
+stat_segment_set_state_counter (u32 index, u64 value)
+{
+ stat_segment_main_t *sm = &stat_segment_main;
+
+ ASSERT (index < vec_len (sm->directory_vector));
+ sm->directory_vector[index].index = value;
+}
+