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JingSmithV2EX 第 385143 号会员，加入于 2019-02-19 11:29:42 +08:00 |
| CompletableFuture 的 Signaller 实现是不是有并发问题？ 程序员 • JingSmith • 254 天前 • 最后回复来自 yeqizhang | 2 |
JingSmith 最近回复了
254 天前 回复了 JingSmith 创建的主题 › 程序员 › CompletableFuture 的 Signaller 实现是不是有并发问题？ |
没 bug ，先 unpark 的话，下次 park 会失效，应该是有个标志位，能抵消一次 park
```java
@Test
public void test() throws InterruptedException {
Thread thread = new Thread(() -> {
try {
TimeUnit.SECONDS.sleep(3);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
System.out.println("start park in thread 1");
LockSupport.park(Thread.currentThread());
System.out.println("start park in thread 2");
LockSupport.park(Thread.currentThread());
System.out.println("end park in thread");
});
thread.start();
TimeUnit.SECONDS.sleep(1);
System.out.println("start unpark in main");
LockSupport.unpark(thread);
LockSupport.unpark(thread);
System.out.println("end unpark in main");
TimeUnit.SECONDS.sleep(4);
LockSupport.unpark(thread);
TimeUnit.SECONDS.sleep(100);
}
```
```java
@Test
public void test() throws InterruptedException {
Thread thread = new Thread(() -> {
try {
TimeUnit.SECONDS.sleep(3);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
System.out.println("start park in thread 1");
LockSupport.park(Thread.currentThread());
System.out.println("start park in thread 2");
LockSupport.park(Thread.currentThread());
System.out.println("end park in thread");
});
thread.start();
TimeUnit.SECONDS.sleep(1);
System.out.println("start unpark in main");
LockSupport.unpark(thread);
LockSupport.unpark(thread);
System.out.println("end unpark in main");
TimeUnit.SECONDS.sleep(4);
LockSupport.unpark(thread);
TimeUnit.SECONDS.sleep(100);
}
```
2019-10-12 12:57:22 +08:00 回复了 zgray 创建的主题 › macOS › 发现一个可能的 IDEA 输入法卡顿的原因 |
新买的 2019 macbookpro vega 20 显卡跑起来都有轻微卡顿，简直了，idea 神优化
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