RTEMS 4.9.5 On-Line Library

Message Passing Manager mq_close - Close a Message Queue

RTEMS POSIX API User's Guide

16.4.2: mq_close - Close a Message Queue

CALLING SEQUENCE:

#include <mqueue.h>

int mq_close(
  mqd_t mqdes
);

STATUS CODES:

EINVAL - The descriptor does not represent a valid open message queue

DESCRIPTION:

The mq_close function removes the association between the message queue descriptor, mqdes, and its message queue. If mq_close() is successfully completed, the function returns a value of zero; otherwise, the function returns a value of -1 and sets errno to indicate the error.

NOTES:

If the process had successfully attached a notification request to the message queue via mq_notify, this attachment is removed, and the message queue is available for another process to attach for notification. mq_close has no effect on the contents of the message queue, all the messages that were in the queue remain in the queue.

RTEMS POSIX API User's Guide