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