POSIX Messages

The POSIX message queue interfaces are listed in the following table.

Table 5–2 POSIX Message Queue Interfaces

Interface Name	Purpose
mq_open(3RT)	Connects to, and optionally creates, a named message queue
mq_close(3RT)	Ends the connection to an open message queue
mq_unlink(3RT)	Ends the connection to an open message queue and causes the queue to be removed when the last process closes it
mq_send(3RT)	Places a message in the queue
mq_receive(3RT)	Receives (removes) the oldest, highest priority message from the queue
mq_notify(3RT)	Notifies a process or thread that a message is available in the queue
mq_setattr(3RT), mq_getattr(3RT)	Set or get message queue attributes