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