OTHERQ(9F)						   Kernel Functions for Drivers 						OTHERQ(9F)

NAME

       OTHERQ, otherq - get pointer to queue's partner queue

SYNOPSIS

       #include <sys/stream.h>
       #include <sys/ddi.h>

       queue_t *OTHERQ(queue_t *q);

INTERFACE LEVEL

       Architecture independent level 1 (DDI/DKI).

PARAMETERS

       q	Pointer to the queue.

DESCRIPTION

       The  OTHERQ()  function returns a pointer to the other of the two queue structures that make up a STREAMS module or driver.  If q points to
       the read queue the write queue will be returned, and vice versa.

RETURN VALUES

       OTHERQ() returns a pointer to a queue's partner.

CONTEXT

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

EXAMPLES

       Example 1: Setting Queues

       This routine sets the minimum packet size, the maximum packet size, the high water mark, and the low water mark	for  the  read	and  write
       queues  of  a given module or driver. It is passed either one of the queues.  This could be used if a module or driver wished to update its
       queue parameters dynamically.

	1  void
	2  set_q_params(q, min, max, hi, lo)
	3      queue_t *q;
	4      short min;
	5      short max;
	6      ushort_t hi;
	7      ushort_t lo;
	8  {
	9	    q->q_minpsz = min;
       10	    q->q_maxpsz = max;
       11	    q->q_hiwat = hi;
       12	      q->q_lowat = lo;
       13	    OTHERQ(q)->q_minpsz = min;
       14	    OTHERQ(q)->q_maxpsz = max;
       15	    OTHERQ(q)->q_hiwat = hi;
       16	    OTHERQ(q)->q_lowat = lo;
       17  }

SEE ALSO

       Writing Device Drivers

       STREAMS Programming Guide

SunOS 5.10							    11 Apr 1991 							OTHERQ(9F)