Class Iterator

src/include/base/cef_callback_list.h:165–198

 protected:
  // An iterator class that can be used to access the list of callbacks.
  class Iterator {
   public:
    explicit Iterator(CallbackListBase<CallbackType>* list)
        : list_(list), list_iter_(list_->callbacks_.begin()) {
      ++list_->active_iterator_count_;
    }

    Iterator(const Iterator& iter)
        : list_(iter.list_), list_iter_(iter.list_iter_) {
      ++list_->active_iterator_count_;
    }

    ~Iterator() {
      if (list_ && --list_->active_iterator_count_ == 0) {
        list_->Compact();
      }
    }

    CallbackType* GetNext() {
      while ((list_iter_ != list_->callbacks_.end()) && list_iter_->is_null())
        ++list_iter_;

      CallbackType* cb = NULL;
      if (list_iter_ != list_->callbacks_.end()) {
        cb = &(*list_iter_);
        ++list_iter_;
      }
      return cb;
    }

   private:
    CallbackListBase<CallbackType>* list_;
    typename std::list<CallbackType>::iterator list_iter_;
  };

  CallbackListBase() : active_iterator_count_(0) {}