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
SunOS 5.11 16 Jan 2006 qsize(9F)
