NAME

strqget - get information about a queue or band of the queue

SYNOPSIS

#include <sys/stream.h>
int strqget(queue_t *q, qfields_t what, unsigned char pri, void *valp);

INTERFACE LEVEL

Architecture independent level 1 (DDI/DKI).

PARAMETERS

Pointer to the queue.

what

Field of the queue structure for (or the specified priority band) to return information about. Valid values are one of:

QHIWAT

High water mark.

QLOWAT

Low water mark.

QMAXPSZ

Largest packet accepted.

QMINPSZ

Smallest packet accepted.

QCOUNT

Approximate size (in bytes) of data.

QFIRST

First message.

QLAST

Last message.

QFLAG

Status.

pri

Priority band of interest.

valp

The address of where to store the value of the requested field.

DESCRIPTION

The strqget() function gives drivers and modules a way to get information about a queue or a particular band of a queue without directly accessing STREAMS data structures, thus insulating them from changes in the implementation of these data structures from release to release.

RETURN VALUES

On success, 0 is returned and the value of the requested field is stored in the location pointed to by valp. An error number is returned on failure.

CONTEXT

The strqget() function can be called from user, interrupt, or kernel context.