列表是否可以被多个线程访问? [英] Can a List<t> be accessed by multiple threads?

问题描述

我打算在多个线程之间共享一个列表.该列表在更改期间会被锁定，这种更改很少发生.如果同时从列表中的不同线程进行多次迭代，是否存在线程安全问题?

I am planning to share a List between multiple threads. The list will be locked during a changes, which happen infrequently. Is there a thread safety issue if multiple iterations are made from different threads through the list simultaneously?

推荐答案

如果可以(如果可以使用.NET 4)，请使用

If you can (if you can use .NET 4 that is), use BlockingCollection<T>:

为实现IProducerConsumerCollection<T>的线程安全集合提供阻止和绑定功能.

Provides blocking and bounding capabilities for thread-safe collections that implement IProducerConsumerCollection<T>.

如果没有，则完全封装该列表，并添加访问List<T>'s状态的线程安全方法.不要公开引用该列表，也不要通过任何方法返回该列表-始终封装该引用，以确保可以锁定对它的所有访问.

If not then encapsulate the list completely and add thread-safe methods that access the List<T>'s state. Don't make the reference to the list public or return it from any methods - always encapsulate the reference so you can guarantee that you are locking around all access to it.

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