qunbufcall(9F) Kernel Functions for Drivers qunbufcall(9F)
NAME
qunbufcall - 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
qunbufcall() 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 perimeters.
(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 qprocsoff(9F).
CONTEXT
qunbufcall() can be called from user or interrupt context.
SEE ALSO
mt-streams(9F), qbufcall(9F), qtimeout(9F), quntimeout(9F)
Writing Device Drivers
STREAMS Programming Guide
SunOS 5.10 17 Oct 2002 qunbufcall(9F)
