StampedLock

StampedLock 讀模板：web final StampedLock sl = new StampedLock(); // 樂觀讀 long stamp = sl.tryOptimisticRead(); // 讀⼊⽅法局部變量 ...... // 校驗 stamp if (!sl.validate(stamp)){ // 升級爲悲觀讀鎖 stamp = sl.re

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