指向对象的指针列表中的内存泄漏 [英] Memory Leak in a list of pointers to objects

问题描述

我有一个指向对象的指针列表.

I have a list of pointers to objects.

 std::list<X*> xList;

我所需要的只是列表的大小，因此我的方法将填充该列表并在其上调用size()，然后返回该大小.

All I need is the size of the list so my method, populates this list and calls size() on it and then returns the size.

注意:我知道这不是最好的解决方案，但是我使用的API提供了动态分配对象的列表，这是我唯一的方法.

NOTE: I know this is not the best solution, but I am using an API that provides a list with dynamically allocated objects and this is the only way I can do it.

现在valgrind表示这里存在内存泄漏.我认为这是因为我从不删除列表中的对象.

Now valgrind is saying that there's memory leaks here. I am assuming that this is because I never delete the objects that are in the list.

我认为我会这样做:

std::list<X*>::iterator iter;
for (iter = xList.begin(); iter != xList.end(); ++iter)
{
    delete (*iter);
}

但这是对此的最佳解决方案吗?

but is this the best solution to this?

推荐答案

不，最好的解决方案是改用std::list<std::unique_ptr<X>>.现在，这些对象将在适当的时候删除它们自己，而您不必担心它.销毁std::list时，其拥有的X对象也将销毁.

No, the best solution would be to have a std::list<std::unique_ptr<X>> instead. Now the objects will delete themselves as and when it's appropriate, and you do not have to concern yourself with it. When the std::list is destroyed, the X objects which are owned by it are also destroyed.

这篇关于指向对象的指针列表中的内存泄漏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！