- 1. The calls act as a warning to other threads to go to sleep and wait their turn for the mutex lock.
- 这两个函数调用的作用就是警告其它线程，要它们继续睡眠并等待轮到它们对互斥对象加锁。
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- 2. There is warning function while opening and closing lock, opening and closing door;
- 开锁、关锁及开门、关门警示功能；
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- 3. System can accomplish password lock, error warning, super times lock, such as password changing the basic function of combination lock.
- 系统能完成密码开锁、错误警示、超次锁定、密码修改等密码锁的基本功能。
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- 4. A friendly warning: If I find sales are lagging, I get testy and lock the exits.
- 友情提示，如果我发现销量上不去将会很生气，并把出口锁上。
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- 5. Provide key override, low-battery detection and warning, LED status indicators, and ability to program at the lock.
- 提供锁覆盖、低电池电压检测和预警，以及LED状态指示灯，从而能够锁定程序。
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- 6. Provide key override, low-battery detection and warning, LED status indicators, and ability to program at the lock.
- 提供锁覆盖、低电池电压检测和预警，以及LED状态指示灯，从而能够锁定程序。
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