QSIZE(9F) Kernel Functions for Drivers QSIZE(9F)
NAME
qsize - find the number of messages on a queue
SYNOPSIS
#include <sys/stream.h>
int qsize(
queue_t *q);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
q Queue to be evaluated.
DESCRIPTION
The
qsize() function evaluates the queue
q and returns the number of
messages it contains.
RETURN VALUES
If there are no message on the queue,
qsize() returns
0. Otherwise,
it returns the integer representing the number of messages on the
queue.
CONTEXT
The
qsize() function can be called from user, interrupt, or kernel
context.
SEE ALSO
Writing Device Drivers STREAMS Programming Guide January 16, 2006 QSIZE(9F)
