MQ_CLOSE(2) MidnightBSD System Calls Manual MQ_CLOSE(2)
mq_close — close a message queue (REALTIME)
POSIX Real-time Library (librt, −lrt)
The mq_close() system call removes the association between the message queue descriptor, mqdes, and its message queue. The results of using this message queue descriptor after successful return from this mq_close(), and until the return of this message queue descriptor from a subsequent mq_open(), are undefined.
If the process has successfully attached a notification request to the message queue via this mqdes, this attachment will be removed, and the message queue is available for another process to attach for notification.
Upon successful completion, the value 0 is returned; otherwise the value −1 is returned and the global variable errno is set to indicate the error.
The mq_close() system call will fail if:
The mqdes argument is not a valid message queue descriptor.
The mq_close() system call conforms to IEEE Std 1003.1-2004 (‘‘POSIX.1’’).
Support for POSIX message queues first appeared in FreeBSD 7.0.
MidnightBSD 0.3 November 29, 2005 MidnightBSD 0.3