opensolaris man page for samestr

SAMESTR(9F)						   Kernel Functions for Drivers 					       SAMESTR(9F)

NAME
       SAMESTR, samestr - test if next queue is in the same stream

SYNOPSIS
       #include <sys/stream.h>

       int SAMESTR(queue_t *q);

INTERFACE LEVEL
       Architecture independent level 1 (DDI/DKI).

PARAMETERS
       q    Pointer to the queue.

DESCRIPTION
       The SAMESTR() function is used to see if the next queue in a stream (if it exists) is the same type as the current queue (that is, both are
       read queues or both are write queues). This function accounts for the twisted queue connections that occur in a STREAMS pipe and should	be
       used in preference to direct examination of the q_next field of queue(9S) to see if the stream continues beyond q.

RETURN VALUES
       The  SAMESTR() function returns 1 if the next queue is the same type as the current queue. It returns 0 if the next queue does not exist or
       if it is not the same type.

CONTEXT
       The SAMESTR() function can be called from user, interrupt, context.

SEE ALSO
       OTHERQ(9F)

       Writing Device Drivers

       STREAMS Programming Guide

SunOS 5.11							    16 Jan 2006 						       SAMESTR(9F)