Circular queues implementations and a test.

- naive circular queue, described in the article "A Scalable, Portable, and
Memory-Efficient Lock-Free FIFO Queue" by Ruslan Nikolaev:
https://drops.dags

Circular queues implementations and a test.

- naive circular queue, described in the article "A Scalable, Portable, and
Memory-Efficient Lock-Free FIFO Queue" by Ruslan Nikolaev:
https://drops.dagstuhl.de/opus/volltexte/2019/11335/pdf/LIPIcs-DISC-2019-28.pdf
- circular queue, proposed by Valentin Bartenev in the "Unit router application
IPC" design draft

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