c++ - 在非 boost 线程中使用 boost::thread_specific_ptr

Question

我正在阅读 the documentation section for boost::thread_specific_ptr ，并尝试解析这段:

Note: on some platforms, cleanup of thread-specific data is not performed for threads created with the platform's native API. On those platforms such cleanup is only done for threads that are started with boost::thread unless boost::on_thread_exit() is called manually from that thread.

首先，可能是迂腐的一点:我假设他们的意思是说 boost::this_thread::at_thread_exit() 而不是 boost::on_thread_exit()。否则我真的迷路了。

更重要的是，线程到底需要做什么？将一些空操作函数传递给 at_thread_exit() 就足够了吗，还是需要传递其他东西？

(这个主题在评论 here 中讨论过，但我仍然不确定我需要做什么。)

(背景故事:我正在寻找我提出的问题的解决方案 earlier today)。

Answer 1

经过更多的挖掘，似乎那个神秘的段落确实意味着说 on_thread_exit()。它指的是一个未记录的函数，它不带任何参数。

这是该函数的声明和随附的注释，来自 boost_1_55_0/boost/thread/detail/tss_hooks.hpp:

BOOST_THREAD_DECL void __cdecl on_thread_exit(void);
    //Function to be called just be fore a thread ends
        //in an exe or dll that uses Boost.Threads.
    //Must be called in the context of the thread
        //that is ending.
    //Called automatically by Boost.Threads when
        //a method for doing so has been discovered.
    //Must not be omitted; may be called multiple times.

所以，iiuc，我需要做的是编写特定于平台的代码，只要任何类型的线程终止，如果该线程一直在使用 boost::thread_specific_ptr，就会触发对该函数的调用>.