Проект OpenNet: MAN OTHERQ (9) Ядро (FreeBSD и Linux)

Интерактивная система просмотра системных руководств (man-ов)

OTHERQ (9)

>> OTHERQ (9) ( Solaris man: Ядро )

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

: 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

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

CONTEXT

The OTHERQ() function can be called from user, interrupt, or kernel 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  }