FutureTask&Sync innerRun

最新推荐文章于 2022-07-23 16:06:38 发布

liuzhaomin

最新推荐文章于 2022-07-23 16:06:38 发布

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文章标签： thread

本文链接：https://blog.youkuaiyun.com/liuzhaomin/article/details/83920847

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/**
         * The thread running task. When nulled after set/cancel, this
         * indicates that the results are accessible.  Must be
         * volatile, to ensure visibility upon completion.
         */
        private volatile Thread runner;

void innerRun() {
            if (!compareAndSetState(0, RUNNING))    //设置失败，直接返回；成功，继续
                return;
            try {
                runner = Thread.currentThread();
                if (getState() == RUNNING) // recheck after setting thread
                    innerSet(callable.call());
                else
                    releaseShared(0); // cancel
            } catch (Throwable ex) {
                innerSetException(ex);
            }
        }