Object data locking is generally per-object. Well, unless you don't have huge scalability issues, in which case you may have some external bigger lock (extreme case: one single global lock).

对象数据保护一般是一个对象拥有一个锁，假设你没有海量扩展性问题，不然你需要一些外部大一点的锁(极端的例子，一个对象一个全局锁)。

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With this kind of thinking, locking the data in the beginning of the transaction can be avoided.

带着这样的思想，我们可以避免在事务处理一开始就锁定数据。

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That is, you make sure that only one thread at a time can access a certain data structure by locking and unlocking it.

这就是说，通过线程的锁定和解锁，对于某一数据结构，确保某一时刻只能有一个线程能够访问它。

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Also new is a smart card API, which will let computer manufacturers add card readers to these handhelds, effectively locking up any data they hold if the devices are lost or stolen.

CNN: Microsoft reinvigorates handheld PC

Medicare, insurers and consumers will have to exert pressure, since individual players may benefit from locking down their own data.

FORBES: Why Haven't Electronic Health Records Made Us Healthier?

One startup called Lookout offers free antivirus filtering along with features for tracking a lost phone and locking or wiping its data remotely.

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