SVR5 and SCO OpenServer 5

qsize(D3str)

qsize -- find the number of messages on a queue

Synopsis

   #include <sys/stream.h>
   #include <sys/ddi.h>
   
   int qsize(queue_t *q);

qsize evaluates the queue pointed to by q and returns the number of messages it contains.

If there are no message on the queue, qsize returns 0. Otherwise, it returns the number of messages on the queue.

qreply( ) is typically used to send back a response of the M_IOCACK(D7str) or M_IOCNAK(D7str) message type to an M_IOCTL(D7str) message.

Base or Interrupt.

Does not block.

Driver-defined basic locks, read/write locks, and sleep locks may be held across calls to this function.

The caller cannot have the stream frozen [see freezestr(D3str)] when calling this function.

All

ddi: 1, 2, 3, 4, 5, 5mp, 6, 6mp, 7, 7mp, 7.1, 7.1mp, 8, 8mp
oddi: 1, 2, 2mp, 3, 3mp, 4, 4mp, 5, 5mp, 6, 6mp