usbi_using_timerfd 285 third_party/libusb/src/libusb/libusbi.h #define usbi_using_timerfd(ctx) ((ctx)->timerfd >= 0) usbi_using_timerfd 287 third_party/libusb/src/libusb/libusbi.h #define usbi_using_timerfd(ctx) (0)