#include <atomic>

template <typename T>
void
do_delete(void* p)
{
  delete static_cast<T*>(p);
}
struct data_to_reclaim {
  void* data;
  std::function<void(void*)> deleter;
  data_to_reclaim* next;
  template <typename T>
  data_to_reclaim(T* p) : data(p), deleter(&do_delete<T>), next(0)
  {
  }
  ~data_to_reclaim() { deleter(data); }
};
std::atomic<data_to_reclaim*> nodes_to_reclaim;
void
add_to_reclaim_list(data_to_reclaim* node)
{
  node->next = nodes_to_reclaim.load();
  while (!nodes_to_reclaim.compare_exchange_weak(node->next, node))
    ;
}
template <typename T>
void
reclaim_later(T* data)
{
  add_to_reclaim_list(new data_to_reclaim(data));
}
void
delete_nodes_with_no_hazards()
{
  data_to_reclaim* current = nodes_to_reclaim.exchange(nullptr);
  while (current) {
    data_to_reclaim* const next = current->next;
    if (!outstanding_hazard_pointers_for(current->data)) {
      delete current;
    }
    else {
      add_to_reclaim_list(current);
    }
    current = next;
  }
}