SR_PRIV int lascar_el_usb_handle_events(int fd, int revents, void *cb_data);
SR_PRIV void lascar_el_usb_receive_transfer(struct libusb_transfer *transfer);
SR_PRIV int lascar_start_logging(const struct sr_dev_inst *sdi);
SR_PRIV int lascar_el_usb_handle_events(int fd, int revents, void *cb_data);
SR_PRIV void lascar_el_usb_receive_transfer(struct libusb_transfer *transfer);
SR_PRIV int lascar_start_logging(const struct sr_dev_inst *sdi);