Is there a garbage collecting class for C++

Is there a class that does garbage collection for C++. I was thinking something like:

class A : public GarbageCollected<A>
{
  void kill()
  {
     GarbageCollected<A>.set_cleanup_flag();
  }
  ...
private:
  GarbageCollectedPointer<B> b_pointer; // Somehow we follow 
  GarbageCollectedPointer<B> b_pointer2; // these pointers.
};

class B
{
  ...
};

class GarbageContainer
{
  ...
};

int main()
{
  GarbageContainer gc;
  gc.add(new A());
  ...
}

The idea being that GarbageContainer would do mark and sweep on the objects or some other garbage collection method. It would save having to do reference counting and using weak_ptrs and garbage collection could be used just for objects it is felt necessary.

Are there any libraries that implement something like this?

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C++0x supports shared_ptr that uses reference counting to keep track of memory allocation. If used carefully, it serves as a good garbage collector.

The shared_ptr deallocates the memory when there are no objects left referring to a memory block (reference count has reached 0).

This tutorial on shared_ptr should get you started.

Here is an advanced tutorial on shared_ptr internals

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Look up Boehm's garbage collector. I don't think it has multiple GC containers out of the box, but you can add this feature yourself if you absolutely need it.

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在C / C ++中，libgc是垃圾收集库的一个很好的选择

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