POSIX Messages

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

Table 6-2 POSIX Message Queue Interfaces

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