.NET：race conditions

最新推荐文章于 2025-02-11 09:47:55 发布

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最新推荐文章于 2025-02-11 09:47:55 发布

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原文链接：http://www.cnblogs.com/happyframework/p/4251528.html

本文解释了竞态条件的概念，即两个或多个线程同时访问共享数据并尝试更改它时发生的情况。由于线程调度算法可以在任何时候切换线程，因此无法预测线程访问共享数据的顺序。这导致数据变化的结果依赖于线程调度算法。文章还提到了当一个线程进行检查-然后-行动操作，而另一个线程在这期间修改了值时，通常会出现问题。

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race conditions (when an anomalous result occurs due to an unexpected critical dependence on the timing of two events).

A race condition occurs when two or more threads can access shared data and they try to change it at the same time. Because the thread scheduling algorithm can swap between threads at any time, you don't know the order in which the threads will attempt to access the shared data. Therefore, the result of the change in data is dependent on the thread scheduling algorithm, i.e. both threads are "racing" to access/change the data.

Problems often occur when one thread does a "check-then-act" (e.g. "check" if the value is X, then "act" to do something that depends on the value being X) and another thread does something to the value in between the "check" and the "act".

http://stackoverflow.com/questions/34510/what-is-a-race-condition

转载于:https://www.cnblogs.com/happyframework/p/4251528.html