UNBUFCALL(9F) Kernel Functions for Drivers UNBUFCALL(9F)
unbufcall - cancel a pending bufcall request
#include <sys/stream.h>
void unbufcall(bufcall_id_t id);
Architecture independent level 1 (DDI/DKI).
id
Identifier returned from bufcall(9F) or esbbcall(9F).
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.
None.
The unbufcall function can be called from user, interrupt, or kernel
context.
bufcall(9F), esbbcall(9F)
Writing Device Drivers
STREAMS Programming Guide
January 16, 2006 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)