C++ freeing static variables referring heap resource

最新推荐文章于 2025-12-18 16:28:22 发布

转载最新推荐文章于 2025-12-18 16:28:22 发布 · 350 阅读

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#variables #c++ #delete #function

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本文探讨了C++中静态变量的生命周期及释放方式。一种方法是在主函数返回后销毁静态std::auto_ptr。另一种方法是注册一个atexit函数，在程序退出时删除静态指针。这两种方法都能确保静态变量被正确清理。

It will have static lifetime and be destroyed after main returns:

static std::auto_ptr<T> thePointer;

Another option is to register your own atexit function:

// static
void YourClass::freePointer(void)
{
    delete getPointer();
}

// static
T* YourClass::getPointer(void)
{
    if (!thePointer)
    {
        thePointer = new T;
        atexit(freePointer);
    }

    return thePointer;
}