mq_close2
Close a message queue (realtime)
Usage
#include <mqueue.h>
int
mq_close(mqd_t mqdes);
Library
library “librt”
Overview
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.
Return values
The mq_close() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
Errors
The mq_close() system call will fail if:
- [EBADF]
-
The mqdes argument is not a valid message queue descriptor.
Releases
44 releases since FreeBSD 7.0-RELEASE; the text changed 30 times.