segment_manager_t *segment_manager_get_if_valid (u32 index);
u32 segment_manager_index (segment_manager_t * sm);
-int segment_manager_add_segment (segment_manager_t * sm, uword segment_size);
+int segment_manager_add_segment (segment_manager_t *sm, uword segment_size,
+ u8 notify_app);
void segment_manager_del_segment (segment_manager_t * sm,
fifo_segment_t * fs);
void segment_manager_lock_and_del_segment (segment_manager_t * sm,