CODEWITHSUNDEEP
c++shared-ptr
Daniel
Daniel

Reputation: 31569

C++ destruction list

I have a class to do a computation using some callbacks. those callbacks need to allocate data (dynamic arrays) that needs to live outside of the callback scope but not after the class destructs. I thought about make a vector of auto_ptr that will just get destructed automatically when the class destructs:

class MyClass
{
    vector<auto_ptr<MyObject>> ThingsToDie;
};

The problem is I have a lot of objects allocated and they don't share a base type so I can't use one vector for this, and making a vector for every type is a lot of work.
A hierarchy like the following:

auto_ptr_base (virtual destructor)
      |
 auto_ptr<T>

Will solve my problem because I could do something like

class MyClass
{
    vector<auto_ptr_base> ThingsToDie;
};

and the destruction will be virtually dispatched to each specialized type automatically.
The problem is that the STL doesn't have that hierarchy and I don't want to re-implement auto_ptr.
Is there any other solution for this?

Upvotes: 1

Views: 137

Answers (1)

Yochai Timmer
Yochai Timmer

Reputation: 49221

You could use a vector<shared_ptr<void>>.

Read this: Why do std::shared_ptr<void> work

Upvotes: 5

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