kotlin - 如何在 Kotlin 中使用 volatile

Question

我尝试过这样的事情:

private volatile var instanceState: InstanceState = InstanceState.starts

Error:  'Expected member declaration'

像这样:

private volatile var instanceState: InstanceState = InstanceState.starts

Error:  'Property getter or setter expected'

Kotlin 不支持 Volatile ？

Answer 1

您可以使用 @Volatile 将属性标记为 volatile注释:

@Volatile var name:String = "stack"

生成的字段声明等同于 Java 的:

private volatile java.lang.String name;

根据 @Volatile文档:

Marks the JVM backing field of the annotated property as volatile, meaning that writes to this field are immediately made visible to other threads.