struct sr_usb_device_instance *sr_usb_device_instance_new(uint8_t bus,
uint8_t address, struct libusb_device_handle *hdl);
void sr_usb_device_instance_free(struct sr_usb_device_instance *usb);
struct sr_usb_device_instance *sr_usb_device_instance_new(uint8_t bus,
uint8_t address, struct libusb_device_handle *hdl);
void sr_usb_device_instance_free(struct sr_usb_device_instance *usb);