insq(9r)insq(9r)NAMEinsq - STREAMS: Inserts a STREAMS message into a queue
SYNOPSIS
#include <sys/stream.h>
int insq(
queue_t *message_queue,
MBLKP message,
MBLKP message_to_be_inserted );
ARGUMENTS
Specifies a pointer to the message queue that contains the message
passed to the message argument. The typedef queue_t is an alternate
name for struct queue_entry *. Specifies the enqueued message before
which the new message is to be inserted. The typedef MBLKP is an alter‐
nate name for typedef struct msgb *. Specifies the message to be
inserted. The typedef MBLKP is an alternate name for typedef struct
msgb *.
DESCRIPTION
The insq interface inserts a STREAMS message into a queue. The message
to be inserted (the message_to_be_inserted argument) is placed in the
queue (the message_queue argument) immediately before the message asso‐
ciated with the message argument. If the message argument is NULL, insq
places the new message at the end of the queue. The interface ignores
the queue class of the new message and it updates all flow-control
parameters. The insq interface also enables the service procedure
unless the QNOENB flag bit is set.
CAUTIONS
If the message argument is non-NULL, it must point to a message on the
queue or a system panic could occur.
RETURN VALUES
Upon successful completion, insq returns the value 1. On failure, it
returns the value zero (0).
SEE ALSO
Programmer's Guide: STREAMS
insq(9r)