MQ_CLOSE(P) POSIX Programmer's Manual MQ_CLOSE(P)
mq_close - close a message queue (REALTIME)
int mq_close(mqd_t mqdes);
The mq_close() function shall remove 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 shall be removed, and the message queue is available for
another process to attach for notification.
Upon successful completion, the mq_close() function shall return a value of zero; other-
wise, the function shall return a value of -1 and set errno to indicate the error.
The mq_close() function shall fail if:
EBADF The mqdes argument is not a valid message queue descriptor.
The following sections are informative.
mq_open() , mq_unlink() , msgctl() , msgget() , msgrcv() , msgsnd() , the Base Definitions
volume of IEEE Std 1003.1-2001, <mqueue.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and The Open Group
Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 MQ_CLOSE(P)