#include <uhd/transport/usb_zero_copy.hpp>

Inheritance diagram for uhd::transport::usb_zero_copy:

Public Types
typedef std::shared_ptr< usb_zero_copy >	sptr

Public Types inherited from uhd::transport::zero_copy_if
typedef std::shared_ptr< zero_copy_if >	sptr

Public Member Functions
	~usb_zero_copy (void) override

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

typedef std::shared_ptr<usb_zero_copy> uhd::transport::usb_zero_copy::sptr

Constructor & Destructor Documentation

◆ ~usb_zero_copy()

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

override

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()`
	)

static

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.

Parameters

handle	a device handle that uniquely identifying the device
recv_interface	an integer specifying an IN interface number
recv_endpoint	an integer specifying an IN endpoint number
send_interface	an integer specifying an OUT interface number
send_endpoint	an integer specifying an OUT endpoint number
hints	optional parameters to pass to the underlying transport

Returns: a new zero copy USB object

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

usb_zero_copy.hpp

Public Types

Public Member Functions