'\" te
.\"  Copyright 1989 AT&T
.\"  Copyright (c) 2006, Sun Microsystems, Inc.,  All Rights Reserved
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.TH OTHERQ 9F "16 Jan 2006" "SunOS 5.11" "Kernel Functions for Drivers"
.SH NAME
OTHERQ, otherq \- get pointer to queue's partner queue
.SH SYNOPSIS
.LP
.nf
#include <sys/stream.h>
#include <sys/ddi.h>



\fBqueue_t *\fR\fBOTHERQ\fR(\fBqueue_t *\fR\fIq\fR);
.fi

.SH INTERFACE LEVEL
.sp
.LP
Architecture independent level 1 (DDI/DKI).
.SH PARAMETERS
.sp
.ne 2
.mk
.na
\fB\fIq\fR\fR
.ad
.RS 5n
.rt  
Pointer to the queue.
.RE

.SH DESCRIPTION
.sp
.LP
The \fBOTHERQ()\fR function returns a pointer to the other of the two
\fBqueue\fR structures that make up a STREAMS module or driver. If \fIq\fR
points to the read queue the write queue will be returned, and vice versa.
.SH RETURN VALUES
.sp
.LP
The \fBOTHERQ()\fR function returns a pointer to a queue's partner.
.SH CONTEXT
.sp
.LP
The \fBOTHERQ()\fR function can be called from user, interrupt, or kernel
context.
.SH EXAMPLES
.LP
\fBExample 1 \fRSetting Queues
.sp
.LP
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.

.sp
.in +2
.nf
 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  }
.fi
.in -2

.SH SEE ALSO
.sp
.LP
\fIWriting Device Drivers\fR
.sp
.LP
\fISTREAMS Programming Guide\fR