UNBUFCALL(9F) Kernel Functions for Drivers UNBUFCALL(9F)

NAME

unbufcall - cancel a pending bufcall request

SYNOPSIS

#include <sys/stream.h>


void unbufcall(bufcall_id_t id);

INTERFACE LEVEL

Architecture independent level 1 (DDI/DKI).

PARAMETERS

id
Identifier returned from bufcall(9F) or esbbcall(9F).

DESCRIPTION

The unbufcall function cancels a pending bufcall() or esbbcall()
request. The argument id is a non-zero identifier for the request to
be cancelled. id is returned from the bufcall() or esbbcall()
function used to issue the request. unbufcall() will not return until
the pending callback is cancelled or has run. Because of this, locks
acquired by the callback routine should not be held across the call
to unbufcall() or deadlock may result.

RETURN VALUES

None.

CONTEXT

The unbufcall function can be called from user, interrupt, or kernel
context.

SEE ALSO

bufcall(9F), esbbcall(9F)


Writing Device Drivers


STREAMS Programming Guide

January 16, 2006 UNBUFCALL(9F)