Headers                                           mqueue.h(3HEAD)



NAME
     mqueue.h, mqueue - message queues

SYNOPSIS
     #include 


DESCRIPTION
     The  header defines the mqdt type, which is  used
     for  message  queue  descriptors.  This will not be an array
     type.  A message queue descriptor may be implemented using a
     file  descriptor,  in which case applications can open up to
     at least OPENMAX file and message queues.


     The  header defines  the  sigevent  structure  (as
     described   in  ,  see  signal.h(3HEAD))  and  the
     mqattr structure, which is used in getting and setting  the
     attributes of a message queue.  Attributes are initially set
     when the message queue is created.  A mqattr structure  has
     the following members:

       long    mqflags       message queue flags
       long    mqmaxmsg      maximum number of messages
       long    mqmsgsize     maximum message size
       long    mqcurmsgs     number of messages currently queued




     Inclusion of the  header may make visible  symbols
     defined in the headers , , ,
     and .

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Standard                    
    


SEE ALSO
     fcntl.h(3HEAD),       signal.h(3HEAD),        time.h(3HEAD),
     types.h(3HEAD), attributes(5), standards(5)





SunOS 5.11          Last change: 30 Aug 2002                    1