freebsd man page for unbufcall

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

       unbufcall  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

       unbufcall() can be called from user or interrupt context.

SEE ALSO

       bufcall(9F), esbbcall(9F)

       Writing Device Drivers

       STREAMS Programming Guide

SunOS 5.10							    18 Feb 1998 						     unbufcall(9F)