Manual Pages for UNIX Operating System command usage for man qunbufcall

Kernel Functions for Drivers                       qunbufcall(9F)



NAME
     qunbufcall - cancel a pending qbufcall request

SYNOPSIS
     #include 
      #include 


     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 perimeters.  (See  mt-streams(9F).)  qunbufcall()
     returns when the bufcall has been cancelled or finished exe-
     cuting. 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
     The qunbufcall() function can be called  from  user,  inter-
     rupt, or kernel context.

SEE ALSO
     mt-streams(9F), qbufcall(9F), qtimeout(9F), quntimeout(9F)


     Writing Device Drivers


     STREAMS Programming Guide





SunOS 5.11          Last change: 16 Jan 2006                    1