LIBUSB_TRANSFER_FREE_BUFFER constant
int
const LIBUSB_TRANSFER_FREE_BUFFER
Automatically free() transfer buffer during libusb_free_transfer(). Note that buffers allocated with libusb_dev_mem_alloc() should not be attempted freed in this way, since free() is not an appropriate way to release such memory.
Implementation
static const int LIBUSB_TRANSFER_FREE_BUFFER = 2;