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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federicoporritos84
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Shared resources between threads need synchronisation for data integrity & consistency. – जलजनक Mar 31 '22 at 21:10
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@SparKot The idea of message queues, that they implement the inter-process synchronization intrinsically. – Eugene Sh. Mar 31 '22 at 21:13
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*is there any sort of protection already built in* - yes, there is. This is exactly the idea of having message queues. – Eugene Sh. Mar 31 '22 at 21:34
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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.
wohlstad
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