osx 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)