C# volatile 理解

最新推荐文章于 2025-03-28 16:50:01 发布

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最新推荐文章于 2025-03-28 16:50:01 发布 · 6.4k 阅读

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#volatile #C# #关键字 #多线程 #一致性

本文探讨了C#中的volatile关键字，旨在确保多线程环境下变量的一致性。volatile防止编译器优化导致的本地缓存，确保所有线程直接操作共享内存，从而保证变量的最新值可见性。

浅谈对C# volatile关键字的理解

一、MSDN解释：

The volatile keyword indicates that a field might be modified by multiple threads that are executing at the same time. Fields that are declared volatile are not subject to compiler optimizations that assume access by a single thread. This ensures that the most up-to-date value is present in the field at all times.
The volatile modifier is usually used for a field that is accessed by multiple threads without using the lock statement to serialize access.
The volatile keyword can be applied to fields of these types:
Reference types.
Pointer types (in an unsafe context). Note that although the pointer itself can be volatile, the object that it points to cannot. In other words, you cannot declare a "pointer to volatile."
Types such as sbyte, byte, short, ushort, int,