Would signaling, say, a semaphore count? That could cause another higher priority realtime process to wake-up and block the signaler forever. I think the canon

Would signaling, say, a semaphore count? That could cause another higher priority realtime process to wake-up and block the signaler forever. I think the canonical meaning of "blocking code" is more of the "I know it when I see it" variety than an useful and rigorous definition.