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【问题】notify丢失的问题

2020/8/28镜像同步3 回复

以下截取自java语言规范。第二点提到notify不能被丢失，这点是需要代码去保证的吗，就比如interruptException就再notify一次？ > ### 17.2.4 Interactions of Waits, Notification, and Interruption The above specifications allow us to determine several properties having to do with the interaction of waits, notification, and interruption. If a thread is both notified and interrupted while waiting, it may either: - return normally from wait, while still having a pending interrupt (in other words, a call to Thread.interrupted would return true) - return from wait by throwing an InterruptedException > The thread may not reset its interrupt status and return normally from the call to wait. Similarly, notifications cannot be lost due to interrupts. Assume that a set s of threads is in the wait set of an object m, and another thread performs a notify on m. Then either: - at least one thread in s must return normally from wait, or - all of the threads in s must exit wait by throwing InterruptedException > Note that if a thread is both interrupted and woken via notify, and that thread returns from wait by throwing an InterruptedException, then some other thread in the wait set must be notified.

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