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Ayke van Laethem
26c36d0a2e
This ensures that calls to print/println happening in different threads are not interleaved. It's a task.PMutex, so this should only change things when threading is used. This matches the Go compiler, which does the same thing: https://godbolt.org/z/na5KzE7en The locks are not recursive, which means that we need to be careful to not call `print` or `println` inside a runtime.print* implementation, inside putchar (recursively), and inside signal handlers. Making them recursive might be useful to do in the future, but it's not really necessary.