Belkin F8E211 Guia do Utilizador descarregar pdf (Página 52)

usbd

device

Get a pointer to the memory allocated by the extra parameter

Synopsis:

#include <sys/usbdi.h>

void *usbd_device_extra( struct usbd_device *device );

Arguments:

device A handle obtained by calling usbd

attach().

Library:

libusbdi

Description:

You use the usbd

device

extra() function to get a pointer to the additional memory

allocated via the extra parameter in usbd

attach().

Returns:

A pointer to the additional memory, or NULL if no device-speciﬁc memory was

allocated by usbd

attach().

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

lookup(), 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()

38 Chapter 4 • USB Library Reference September 10, 2007

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