3 cancellation race concerns - better tracking of kernel feedback?
5 isochronous endpoint I/O
7 abstraction for cross-platform-ness
11 add some libusb_transfer flags:
12 - treat short transfers as errors
13 - unlink behaviour control
14 - setup packet prepends data (no copying needed)
15 - update timeout with time remaining
17 1.0 API style/naming points to reconsider
18 =========================================
20 config struct/function naming
21 typedef _cb or _cb_fn or _cb_t?
22 typedef as-is or pointers? libusb_dev_t rather than libusb_dev *?
26 optional timerfd support (runtime detection)
27 notifications of hotplugged/unplugged devices
28 use poll() rather than select()?