CAA Memory Block Manager documentation

2022-03-28T16:01:09.171000Z

The Codesys help reference this library in "Synchronization of Concurrent Execution" page https://help.codesys.com/webapp/synchronization;product=LibDevSummary;version=3.5.17.0 talking about message queues vs. shared memory.

Since I was investigating that page to build a N-producer,1-consumer message queue synchronized by SEMA (doh!), I thought "Fantastic, infrastructure has already been created!" but then I stumped into the documentation... er, not: I could not stump into it because there was NO documentation of MsgSend, MsgReceive, XChgCreateP, and their relatives.

It's not very difficult to imagine how XChgCreateP/H works, and I think that MsgReceive is straightforward (except for the potential requirement of releasing the read message?), but... how to create a message to invoke MsgSend with?

Or should I roll the well-known ringbuffer?

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CAA Memory Block Manager documentation