停止调用JNI函数的Java线程 [英] Stop Java thread which call JNI function

问题描述

在这里，我想停止我的线程或杀死我在Java层上创建的线程，该线程正在调用JNI函数.有时，根据我的应用程序要求，如果发生这种情况，我必须在某些情况下停止此 JNI函数执行，否则就不会.

Here I want to stop my thread or kill my thread which is created on Java layer, and this thread is calling JNI function. Sometimes as per my application requirement, I have to stop this JNI function execution on some conditions if its going on, otherwise not.

new Thread(new Runnable() {
    @Override
    public void run() {
         // My jni function call, It calls my JNI layer C function.
         }
   }

现在，当该线程执行开始并且在JNI级别上进行工作时，我对此无后顾之忧，但是在某些情况下，从其他类或方法中，我想停止此JNI工作，那么如何停止该线程.

Now when this thread execution is started and its doing work at JNI level I have no worries about that, but from other class or methods on some condition I want to stop this JNI work so how can I stop this thread.

注意:在这里，我的线程也没有while循环，因此我也无法检查一些全局标志变量.

Note: Here my thread also has no while-loop so I cant check with some global flag variable also.

所以没有人知道如何在不使用while循环的情况下调用任何JNI函数时杀死线程.

So does anyone have an idea on how to kill a thread while its call any JNI function without while loop.

推荐答案

如果线程正在执行本机代码，则不能安全中断线程.即使您的线程有一个事件循环，您也需要等到它完成本机调用.对您的代码一无所知，我想您有一个运行时间很长的本机调用，您不希望它阻塞主线程，因此为该调用创建了一个单独的线程.您无法安全中断单个本地通话.这里没有银弹.无论如何，您都需要更改代码，我的建议是:

You can't safely interrupt a thread, if it is executing a native code. Even if your thread had an event loop, you need to wait until it finishes the native call. Knowing nothing about your code, i would guess that you had a long running native call, you didn't want it to clog the main thread, so you created a separate thread for that call. There is no way you can safely interrupt a single native call. No silver bullet here. You need to change your code in any case, my suggestions would be:

• 将您的单个长本地调用分解为一系列短调用，并在Java端运行事件循环
• 在本机端内部分解本机调用，并在本机端运行事件循环.您的本机界面将需要另一种设置中断标志的方法.

Thread.interrupt() 不会对您有帮助，因为调用本机函数"不属于Javadoc中指定的任何可中断操作. Java线程将继续运行，只设置其中断状态.

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