NOCHPOLL(9F) Kernel Functions for Drivers NOCHPOLL(9F)
nochpoll - error return function for non-pollable devices
#include <sys/ddi.h>
#include <sys/sunddi.h>
int nochpoll(dev_t dev, short events, int anyyet, short *reventsp,
struct pollhead **pollhdrp);
illumos DDI specific (illumos DDI).
dev
Device number.
events
Event flags.
anyyet
Check current events only.
reventsp
Event flag pointer.
pollhdrp
Poll head pointer.
The nochpoll() function is a routine that simply returns the value
ENXIO. It is intended to be used in the cb_ops(9S) structure of a
device driver for devices that do not support the poll(2) system
call.
The nochpoll() function returns ENXIO.
The nochpoll() function can be called from user, interrupt, or kernel
context.
poll(2), chpoll(9E), cb_ops(9S)
Writing Device Drivers
January 16, 2006 NOCHPOLL(9F)
NAME
nochpoll - error return function for non-pollable devices
SYNOPSIS
#include <sys/ddi.h>
#include <sys/sunddi.h>
int nochpoll(dev_t dev, short events, int anyyet, short *reventsp,
struct pollhead **pollhdrp);
INTERFACE LEVEL
illumos DDI specific (illumos DDI).
PARAMETERS
dev
Device number.
events
Event flags.
anyyet
Check current events only.
reventsp
Event flag pointer.
pollhdrp
Poll head pointer.
DESCRIPTION
The nochpoll() function is a routine that simply returns the value
ENXIO. It is intended to be used in the cb_ops(9S) structure of a
device driver for devices that do not support the poll(2) system
call.
RETURN VALUES
The nochpoll() function returns ENXIO.
CONTEXT
The nochpoll() function can be called from user, interrupt, or kernel
context.
SEE ALSO
poll(2), chpoll(9E), cb_ops(9S)
Writing Device Drivers
January 16, 2006 NOCHPOLL(9F)