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POSIX Message Queues

Asynchronous Notification

Instead of calling mq_receive(), a process can receive asynchronous notification when a message arrives on a previously empty queue.

• mq_notify(2).
  
  
• Only one process can receive notifications.
  
  
• Various notification methods:
  
  
  • Send a signal.
    
    
  • Start a thread function.
  
  cf. POSIX timers (both from POSIX.1b).

(C) 2006, Michael Kerrisk