如何在线程创建和退出时调用函数?

问题描述

#include <pthread.h>
#include <iostream>

using namespace std;

void OnCreateThread()
{
    cout << "Create a thread." << endl;
}

void OnExitThread()
{
    cout << "Exit a thread." << endl;
}

void f(void*) {}

int main()
{
    //
    // What to do here ???
    //
    pthread_t dummy;
    pthread_create(&dummy, 0, f, 0);
    pthread_create(&dummy, 0, f, 0);
    while (true);
}

代码创建了两个本机线程，而不是std::thread ，我希望它输出如下:

The code creates two native threads, other than std::thread, and I want it to output as follows:

Create a thread.
Create a thread.
Exit a thread.
Exit a thread.

可以在Windows下使用FlsXXX函数完成.

It can be done under Windows by using FlsXXX functions.

但是，我不知道它是否也可以在Linux下完成.

However, I don't know whether it can also be done under Linux.

Linux下是否有标准方法?

Is there a standard way under Linux?

推荐答案

至少存在一个pthread_cleanup_push函数，该函数可让您添加一个在线程终止后立即被调用的函数.从未听说过可以创建相同的东西，但是某些API可能会有这样的东西.

There exists at least a pthread_cleanup_push function that lets you add a function that will be called just after thread termination. Never heard about the same for creation, but some API may have such.

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