Should read mq_receive and write mq_send be protected by semaphores when accessing a queue in a multiprocess program or is there any sort of protection alredy built in
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Answer
It’s always recomended to read the formal documentation for API you are using.
Specifcally for mq_receive and mq_send these are:
- https://man7.org/linux/man-pages/man3/mq_send.3.html
- https://man7.org/linux/man-pages/man3/mq_receive.3.html
In the atributes section you can see that both these functions are thread safe, meaning you can access them from multiple threads without additional protection.