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NAME="POSIX-MESSAGE-PASSING">Message Passing &#0091;POSIX Section 15&#0093;</H1
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>mqd&#0095;t mq&#0095;open( const char &#0042;name, int  oflag, ... ); 
int mq&#0095;close( mqd&#0095;t  mqdes ); 
int mq&#0095;unlink( const char &#0042;name );
int mq&#0095;send( mqd&#0095;t mqdes, const char &#0042;msg&#0095;ptr,
	     size&#0095;t msg&#0095;len, unsigned int msg&#0095;prio ); 
ssize&#0095;t mq&#0095;receive( mqd&#0095;t mqdes, char &#0042;msg&#0095;ptr,
	            size&#0095;t msg&#0095;len, unsigned int &#0042;msg&#0095;prio );
int mq&#0095;setattr( mqd&#0095;t mqdes, const struct mq&#0095;attr &#0042;mqstat,
	        struct mq&#0095;attr &#0042;omqstat ); 
int mq&#0095;getattr( mqd&#0095;t mqdes, struct mq&#0095;attr &#0042;mqstat ); 
int mq&#0095;notify( mqd&#0095;t mqdes, const struct sigevent &#0042;notification );</PRE
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>int mq&#0095;send( mqd&#0095;t mqdes, const char &#0042;msg&#0095;ptr,
	     size&#0095;t msg&#0095;len, unsigned int msg&#0095;prio,
             const struct timespec *abs_timeout ); 
ssize&#0095;t mq&#0095;receive( mqd&#0095;t mqdes, char &#0042;msg&#0095;ptr,
	            size&#0095;t msg&#0095;len, unsigned int &#0042;msg&#0095;prio,
             const struct timespec *abs_timeout );</PRE
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>    The presence of message queues is controlled by the
    CYGPKG&#0095;POSIX&#0095;MQUEUES option.  Setting this will
    cause &#0091;&#0095;POSIX&#0095;MESSAGE&#0095;PASSING&#0093; to
    be defined and the message queue API to be made available.
    </P
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>    Message queues are not currently filesystem objects. They live in
    their own name and descriptor spaces.
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