OTHERQ(D3)OTHERQ(D3)NAMEOTHERQ - get a pointer to queue's partner queue
SYNOPSIS
#include <sys/stream.h>
#include <sys/ddi.h>
queue_t *OTHERQ(queue_t *q);
Arguments
q Pointer to the queue.
DESCRIPTION
The OTHERQ function returns a pointer to the other of the two queue
structures that make up an instance of a STREAMS module or driver.
Return Values
OTHERQ returns a pointer to a queue's partner.
USAGE
Level
Base or Interrupt.
Synchronization Constraints
Does not sleep.
Multithreaded drivers may hold driver-defined basic locks, read/write
locks, and sleep locks across calls to this function.
Examples
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(queue_t *q, long min, long max, ulong_t hi, ulong_t lo)
3 {
4 pl_t pl; /* for multi-threaded drivers */
5 (void) strqset(q, QMINPSZ, 0, min);
6 (void) strqset(q, QMAXPSZ, 0, max);
7 (void) strqset(q, QHIWAT, 0, hi);
8 (void) strqset(q, QLOWAT, 0, lo);
9 (void) strqset(OTHERQ(q), QMINPSZ, 0, min);
10 (void) strqset(OTHERQ(q), QMAXPSZ, 0, max);
11 (void) strqset(OTHERQ(q), QHIWAT, 0, hi);
12 (void) strqset(OTHERQ(q), QLOWAT, 0, lo);
13 }
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OTHERQ(D3)OTHERQ(D3)REFERENCESRD(D3), WR(D3)
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