Content-type: text/html Man page of strqget

strqget

Section: Kernel Functions for Drivers (9F)
Updated: 16 Jan 2006
Index Return to Main Contents
 

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

q 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.  

SEE ALSO

strqset(9F), queue(9S)

Writing Device Drivers

STREAMS Programming Guide


 

Index

NAME
SYNOPSIS
INTERFACE LEVEL
PARAMETERS
DESCRIPTION
RETURN VALUES
CONTEXT
SEE ALSO

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