Daniel Black 1d6502b4f4 MDEV-34534 main.plugin_load(daemon_example) - AddressSanitizer: Joining already joined thread, aborting ...

Joining with a thread that has previously been joined results in undefined behavior.

This example plugin performs the same join to the same thread a few
lines later. ASAN keeps track of this and fails.

Make the behaviour defined by joining only once.

Thanks Vladislav Vaintroub for looking up the behaviour.

While here;
* init/deinit function argument was actually used.
* correct code comments
* attribute define not needed

Thanks Marko Mäkelä for review and suggesting other
fixes.

2024-11-18 22:35:40 +11:00

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