RTOS Internals - Mailbox,Message Queue and PIPE

[vijay s]

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...

 

[VirtualThread]

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.

 

[vijay s]

can you post some link which describes more on this...

 

[john2020]

if its helpful,let me know

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

 

[afinko]

Message Queues, Mailboxes, and Pipes:
Message Queues, Mailboxes, and Pipes - RTOS

 

[navenmou]

https://web.mit.edu/16.070/www/year2001/itc.pdf