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)