Description
resource 
msg_get_queue ( int key [, int perms] )
     msg_get_queue() returns an id that can be used to
     access the System V message queue with the given
     key. The first call creates the message queue with
     the optional perms (default: 0666).
     A second call to msg_get_queue() for the same
     key will return a different message queue
     identifier, but both identifiers access the same underlying message
     queue.
     If the message queue already exists, the perms
     will be ignored.
    
     See also msg_remove_queue(),
     msg_receive(), msg_send(),
     msg_stat_queue() and
     msg_set_queue().