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* worker_queue: fix worker_queue_add_lastEgor Tensin2023-06-09
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* STAILQ -> SIMPLEQEgor Tensin2023-06-09
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* add {file,net}_close as a wrapper to close(2)Egor Tensin2023-06-09
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* worker_queue: forgot to close file descriptors in worker_destroyEgor Tensin2023-05-15
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* rework server-worker communicationEgor Tensin2023-05-15
| | | | | | | | | | | | | | | | | | OK, this is a major rework. * tcp_server: connection threads are not detached anymore, the caller has to clean them up. This was done so that the server can clean up the threads cleanly. * run_queue: simple refactoring, run_queue_entry is called just run now. * server: worker threads are now killed when a run is assigned to a worker. * worker: the connection to server is no longer persistent. A worker sends "new-worker", waits for a task, closes the connection, and when it's done, sends the "complete" message and waits for a new task. This is supposed to improve resilience, since the worker-server connections don't have to be maintained while the worker is doing a CI run.
* holy crap, it actually kinda works nowEgor Tensin2022-08-28
| | | | | | | | | | | | | | | | | | | | | | | Previously, I had a stupid system where I would create a thread after every accept(), and put worker descriptors in a queue. A special "scheduler" thread would then pick them out, and give out jobs to complete. The problem was, of course, I couldn't conveniently poll job status from workers. I thought about using poll(), but that turned out to be a horribly complicated API. How do I deal with partial reads, for example? I don't honestly know. Then it hit me that I could just use the threads that handle accept()ed connections as "worker threads", which would synchronously schedule jobs and wait for them to complete. This solves every problem and removes the need for a lot of inter-thread synchronization magic. It even works now, holy crap! You can launch and terminate workers at will, and they will pick up new jobs automatically. As a side not, msg_recv_and_handle turned out to be too limiting and complicated for me, so I got rid of that, and do normal msg_recv/msg_send calls.
* add check_errno macroEgor Tensin2022-08-26
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* add some more codeEgor Tensin2022-08-26
This adds a basic "worker" program. You can now do something like ./server & ./worker & ./client ci_run URL REV and the server should pass a message to worker, after which it should clone the repository at URL, checkout REV, and try to run the CI script. It's extremely unfinished: I need to sort out the graceful shutdown, how the server manages workers, etc.