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RTOS Internals - Mailbox,Message Queue and PIPE

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vijay s

vijay s

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RTOS Internals

What is the difference between Mailbox,Message Queue and PIPE in RTOS

All these are Inter-Task communication Tool.. how they get differ...
 

Mailbox follows the pull model. i.e. the sender task can send a message to the mailbox and the receiver doesn't have to get it immediately. He has to check if there is a message in the mailbox to consume.

The difference depends on the OS implementation. Some OSes don't make any difference between pipe and queue; some do it one way and some other ways. Here are a couple of them

1.
Queue can be shared between multiple tasks i.e. multiple tasks can consume from queue while pipe can be share between two tasks only; one producer and the second consumer

2.
Message queue is same as pipe with the only difference that pipe is byte oriented while queue can be of any size.
 

if its helpful,let me know

idea.engr.uky.edu/wiki/data/media/.../embedded_software_primer_-_ch7.ppt
 
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