void segment_manager_del_segment (segment_manager_t * sm,
fifo_segment_t * fs);
void segment_manager_lock_and_del_segment (segment_manager_t * sm,
void segment_manager_del_segment (segment_manager_t * sm,
fifo_segment_t * fs);
void segment_manager_lock_and_del_segment (segment_manager_t * sm,