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Marc Schier
d0ef235286
Previous Reset(): Volatile.Write(ref m_started, 0); Interlocked.Exchange(ref m_startTicks, kNotStarted); A concurrent EnsureStarted() observer could see m_started == 0 (taking the "reset, so go start" branch), then read the stale m_startTicks value BEFORE the Interlocked.Exchange landed, and treat the budget as already-started against the pre-reset timestamp. IsExhausted / TryConsume then computed elapsed time from the old origin. Fix: reset m_startTicks first, then m_started. EnsureStarted writes m_started = 1 only after the CAS on m_startTicks succeeds, so resetting m_startTicks first preserves that invariant — no observer can see "started == 1" with a stale tick value.