Belkin F8E211 Guia do Utilizador descarregar pdf (Página 53)

device

lookup()

Map the device instance identiﬁer to an opaque device handle (from usbd

attach())

Synopsis:

#include <sys/usbdi.h>

struct usbd_device *usbd_device_lookup(

struct usbd_connection *connection,

usbd_device_instance_t *instance );

Arguments:

connection A handle obtained by calling usbd

connect().

instance The device instance identiﬁer obtained by calling usbd

attach().

Library:

libusbdi

Description:

You use the usbd

device

lookup() function to map the device instance identiﬁer to an

opaque device handle. This is typically required in the removal callback.

Returns:

An opaque device handle, or NULL.

Classiﬁcation:

QNX Neutrino, QNX 4

Safety

Cancellation point No

Interrupt handler No

Signal handler No

Thread Yes

See also:

usbd

args

lookup(), usbd

attach(), usbd

conﬁguration

descriptor(),

usbd

device

extra(), usbd

device

descriptor(), usbd

endpoint

descriptor(),

usbd

hcd

info(), usbd

hub

descriptor(), usbd

interface

descriptor(),

usbd

languages

descriptor(), usbd

parse

descriptors(), usbd

string(),

usbd

urb

status()

September 10, 2007 Chapter 4 • USB Library Reference 39

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