XBT_PUBLIC(void) xbt_fifo_push_item(xbt_fifo_t, xbt_fifo_item_t);
XBT_PUBLIC(xbt_fifo_item_t) xbt_fifo_pop_item(xbt_fifo_t);
XBT_PUBLIC(void) xbt_fifo_unshift_item(xbt_fifo_t, xbt_fifo_item_t);
XBT_PUBLIC(xbt_fifo_item_t) xbt_fifo_shift_item(xbt_fifo_t);
XBT_PUBLIC(void) xbt_fifo_push_item(xbt_fifo_t, xbt_fifo_item_t);
XBT_PUBLIC(xbt_fifo_item_t) xbt_fifo_pop_item(xbt_fifo_t);
XBT_PUBLIC(void) xbt_fifo_unshift_item(xbt_fifo_t, xbt_fifo_item_t);
XBT_PUBLIC(xbt_fifo_item_t) xbt_fifo_shift_item(xbt_fifo_t);