>> I am unsure if the check reordering would be desirable for this function implementation. > > Ah, you want to confirm whether > > usb_endpoint_dir_in(ep) && usb_endpoint_xfer_bulk(ep) > > is the same as > > usb_endpoint_xfer_bulk(ep) && usb_endpoint_dir_in(ep) > > ? Exactly, yes. Commutativity can probably be applied in this case. But the different execution order will influence the corresponding run time characteristics. https://en.wikipedia.org/wiki/Short-circuit_evaluation https://en.wikipedia.org/wiki/Commutative_property The data processing order from known API function implementations might get priority also at discussed source code places in the near future. Regards, Markus
