“安全句柄已关闭"线程中止:是否可以避免程序崩溃?

问题描述

我使用不确定的DLL，这些DLL可以使用不确定的资源(例如COM端口).一些DLL方法没有自己的超时，因此我被迫中止执行线程.但是，如果线程正在使用COM端口等资源，而我中止了线程，则程序将崩溃，并显示错误安全句柄已关闭".我知道为什么会发生这种情况，但是有什么办法可以捕捉到该异常或将其跳过，而不是实际崩溃吗?

Im using undetermined DLLs which can use undetermined resources such as a COM port.Some DLL methods don't have their own timeouts, so i am forced to abort the execution thread.But if the thread is using a resource such as a COM port, and i abort the thread, my program crashes with the error "Safe handle has been closed". I know why this happens but is there any way to catch this exception or skip it, rather than an actual crash?

推荐答案

解决方案:在注释中感谢Sinatr.在单独的AppDomain中运行代码会绕过异常和崩溃.

Solution:Running the code in a separate AppDomain bypasses the exception and crash - thanks to Sinatr in the comments.

代码示例.之前(崩溃)

Code example. Before (crashed)

Work work = new Work();
Thread execThread = new Thread(new ParameterizedThreadStart(work.COM_StartCommand));
execThread.Start("COM4");

Thread.Sleep(5000);
execThread.Abort();

for (int i = 0; i < 1000; i++)
{
    Console.WriteLine("bump" + i); //crashes around iteration 20
    Thread.Sleep(1000);
}

之后:(永不崩溃)

using (Isolated<Work> isolated = new Isolated<Work>())
{
    Thread TestThread = new Thread(new ParameterizedThreadStart(isolated.Value.COM_StartCommand));
    TestThread.Start("COM4");

Thread.Sleep(5000);
TestThread.Abort();
}

for (int i = 0; i < 1000; i++)
{
    Console.WriteLine("bump" + i);
    Thread.Sleep(1000);
}

灵感来自 https://bitlush.com/blog/executing-code-in-a-separate-application-domain-using-c-sharp .现在，我只需要传递变量.

Inspired by https://bitlush.com/blog/executing-code-in-a-separate-application-domain-using-c-sharp.Now I just need to pass around variables.

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