std :: thread增加DLL引用计数，从而防止DLL的卸载 [英] std::thread increses DLL reference count, which prevents the unloading of the DLL

问题描述

我有一个Windows c ++ dll，该文件由第三方程序加载.我最近添加了一个线程池(这个 https://github.com/progschj/ThreadPool/blob/master/ThreadPool.h ).

I have a windows c++ dll which gets loaded by a third party program. I recently added a thread pool (this one https://github.com/progschj/ThreadPool/blob/master/ThreadPool.h).

但是，当第三方程序不再需要该dll时，该dll将不再被卸载.原因是线程池中产生的每个线程都会将dll引用计数增加一.一个问题是我不知道第三方程序何时不再需要该dll，因此我之前无法手动关闭线程池以减少引用计数.

But now the dll get no longer unloaded when the third party program no longer needs it. The reason is that every thread spawned in the thread pool increases the dll reference count by one. One problem is that I don't know when the third party program no longer needs the dll, so I can't manually shutdown the thread pool before, to reduce the reference count.

所以我的问题是，有没有一种方法可以创建一个线程而不增加dll的引用计数?如果是这样，当dll卸载时，我需要手动关闭线程池吗?

So my question is, is there a way to create a thread without increasing the dll's reference count? And if so, when the dll gets unloaded do I need to manually shut down the thread pool ?

旁注:我使用vs 2019和c ++ 17.

Side note: I use vs 2019 and c++17.

推荐答案

它调用的DLL_PROCESS_DETACH呢?如果是这样，您应该在其中加入线程.

And what about DLL_PROCESS_DETACH does it called? If so you should join threads in it.

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