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Kernel Functions for Driversnochpoll(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

 

Solaris DDI specific (Solaris DDI).

PARAMETERS

 
dev
Device number.
events
Event flags.
anyyet
Check current events only.
reventsp
Event flag pointer.
pollhdrp
Poll head pointer.

DESCRIPTION

 

nochpoll() 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

 

nochpoll() returns ENXIO.

CONTEXT

 

nochpoll() can be called from user or interrupt context.

SEE ALSO

 

poll(2), chpoll(9E), cb_ops(9S)

Writing Device Drivers


SunOS 5.9Go To TopLast Changed 11 Oct 1995

 
      
      
Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.