USRP Hardware Driver and USRP Manual  Version:
UHD and USRP Manual
uhd::transport::usb_zero_copy Class Reference

#include <uhd/transport/usb_zero_copy.hpp>

Inheritance diagram for uhd::transport::usb_zero_copy:

Public Types

typedef std::shared_ptr< usb_zero_copysptr
- Public Types inherited from uhd::transport::zero_copy_if
typedef std::shared_ptr< zero_copy_ifsptr

Public Member Functions

virtual ~usb_zero_copy (void)
- Public Member Functions inherited from uhd::transport::zero_copy_if
virtual ~zero_copy_if ()
virtual managed_recv_buffer::sptr get_recv_buff (double timeout=0.1)=0
virtual size_t get_num_recv_frames (void) const =0
virtual size_t get_recv_frame_size (void) const =0
virtual managed_send_buffer::sptr get_send_buff (double timeout=0.1)=0
virtual size_t get_num_send_frames (void) const =0
virtual size_t get_send_frame_size (void) const =0

Static Public Member Functions

static sptr make (usb_device_handle::sptr handle, const int recv_interface, const unsigned char recv_endpoint, const int send_interface, const unsigned char send_endpoint, const device_addr_t &hints=device_addr_t())

Detailed Description

A zero copy USB transport provides an efficient way to handle data. by avoiding the extra copy when recv() or send() is called on the handle. Rather, the zero copy transport gives the caller memory references. The caller informs the transport when it is finished with the reference.

On Linux systems, the zero copy transport can use a kernel packet ring. If no platform specific solution is available, make returns a boost asio implementation that wraps functionality around standard send/recv calls.

Member Typedef Documentation

◆ sptr

Constructor & Destructor Documentation

◆ ~usb_zero_copy()

virtual uhd::transport::usb_zero_copy::~usb_zero_copy ( void  )

Member Function Documentation

◆ make()

static sptr uhd::transport::usb_zero_copy::make ( usb_device_handle::sptr  handle,
const int  recv_interface,
const unsigned char  recv_endpoint,
const int  send_interface,
const unsigned char  send_endpoint,
const device_addr_t hints = device_addr_t() 

Make a new zero copy USB transport: This transport is for sending and receiving between the host and a pair of USB bulk transfer endpoints. The primary usage for this transport is data transactions. The underlying implementation may be platform specific.

handlea device handle that uniquely identifying the device
recv_interfacean integer specifying an IN interface number
recv_endpointan integer specifying an IN endpoint number
send_interfacean integer specifying an OUT interface number
send_endpointan integer specifying an OUT endpoint number
hintsoptional parameters to pass to the underlying transport
a new zero copy USB object

The documentation for this class was generated from the following file: