[Go to CFHT Home Page] Man Pages
Back to Software Index  BORDER=0Manpage Top Level
    strqset(9F) manual page Table of Contents

Name

strqset - change information about a queue or band of the queue

Synopsis


#include <sys/stream.h>

int strqset(queue_t *q, qfields_t what, unsigned char pri, long val);

Interface Level

Architecture independent level 1 (DDI/DKI).

Arguments

q
Pointer to the queue.
what
Field of the queue structure (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.
pri
Priority band of interest.
val
The value for the field to be changed.

Description

strqset() gives drivers and modules a way to change information about a queue or a particular band of a queue without directly accessing STREAMS data structures.

Return Values

On success, 0 is returned. EINVAL is returned if an undefined attribute is specified.

Context

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

See Also

freezestr(9F) , strqget(9F) , unfreezestr(9F) , queue(9S)


Notes

The stream must be frozen using freezestr(9F) before calling strqset().

To set the values of QMINPSZ and QMAXPSZ from within a single call to freezestr(9F) and unfreezestr(9F) : when lowering the existing values, set QMINPSZ before setting QMAXPSZ ; when raising the existing values, set QMAXPSZ before setting QMINPSZ .

Table of Contents