NAME

       mq_close - close a message queue (REALTIME)

SYNOPSIS

       #include <mqueue.h>

       int mq_close(mqd_t mqdes);

DESCRIPTION

       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.

RETURN VALUE

       Upon successful completion, the mq_close() function shall return a value of zero; otherwise, the function
       shall return a value of -1 and set errno to indicate the error.

ERRORS

       The mq_close() function shall fail if:

       EBADF  The mqdes argument is not a valid message queue descriptor.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       mq_open() , mq_unlink() , msgctl() , msgget() , msgrcv() , msgsnd() ,  the  Base  Definitions  volume  of
       IEEE Std 1003.1-2001, <mqueue.h>

COPYRIGHT

       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
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                                   2003                                           MQ_CLOSE(P)