man pages section 3: Basic Library Functions

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Updated: July 2014
 
 

mq_close(3C)

Name

mq_close - close a message queue

Synopsis

#include <mqueue.h> 

int mq_close(mqd_t mqdes);

Description

The mq_close() function 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(3C), are undefined.

If the process (or thread) has successfully attached a notification request to the message queue via this mqdes, this attachment is removed and the message queue is available for another process to attach for notification.

Return Values

Upon successful completion, mq_close() returns 0; otherwise, the function returns −1 and sets errno to indicate the error condition.

Errors

The mq_close() function will fail if:

EBADF

The mqdes argument is an invalid message queue descriptor.

ENOSYS

The mq_open() function is not supported by the system.

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
MT-Level
MT-Safe
Standard

See Also

mqueue.h(3HEAD), mq_notify(3C), mq_open(3C), mq_unlink(3C), attributes(5), standards(5)