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46. System V Message Queues > Disadvantages of System V Message Queues

Disadvantages of System V Message Queues

UNIX systems provide a number of mechanisms for transmitting data from one process to another on the same system, either in the form of an undelimited byte stream (pipes, FIFOs, and UNIX domain stream sockets) or as delimited messages (System V message queues, POSIX message queues, and UNIX domain datagram sockets).

A distinctive feature of System V message queues is the ability to attach a numeric type to each message. This provides for two possibilities that may be useful to applications: reading processes may select messages by type, or they may employ a priority-queue strategy so that higher-priority messages (i.e., those with lower message type values) are read first.


  

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