qunbufcall(9F) Kernel Functions for Drivers qunbufcall(9F)NAMEqunbufcall - cancel a pending qbufcall request
SYNOPSIS
#include <sys/stream.h>
#include <sys/ddi.h>
void qunbufcall(queue_t *q, bufcall_id_t id);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
PARAMETERS
q Pointer to STREAMS queue_t structure.
id Identifier returned from qbufcall(9F).
DESCRIPTION
The qunbufcall() function cancels a pending qbufcall() request. The
argument id is a non-zero identifier of the request to be cancelled. id
is returned from the qbufcall() function used to issue the cancel
request.
The qunbufcall() function is tailored to be used with the enhanced
STREAMS framework interface which is based on the concept of perime‐
ters. (See mt-streams(9F).) qunbufcall() returns when the bufcall has
been cancelled or finished executing. The bufcall will be cancelled
even if it is blocked at the perimeters associated with the queue. All
outstanding timeouts and bufcalls must be cancelled before a driver
close routine can block and before the close routine calls qproc‐
soff(9F).
CONTEXT
The qunbufcall() function can be called from user, interrupt, or kernel
context.
SEE ALSOmt-streams(9F), qbufcall(9F), qtimeout(9F), quntimeout(9F)
Writing Device Drivers
STREAMS Programming Guide
SunOS 5.10 16 Jan 2006 qunbufcall(9F)
