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
SAMESTR() 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
SAMESTR() can be called from user or interrupt context.
SEE ALSO
OTHERQ(9F)
Writing Device Drivers
STREAMS Programming Guide
SunOS 5.10 11 Apr 1991 SAMESTR(9F)
