1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef LIBMEMUNREACHABLE_LINKED_LIST_H_ 18 #define LIBMEMUNREACHABLE_LINKED_LIST_H_ 19 20 namespace android { 21 22 template <class T> 23 class LinkedList { 24 public: LinkedList()25 LinkedList() : next_(this), prev_(this), data_() {} LinkedList(T data)26 explicit LinkedList(T data) : LinkedList() { data_ = data; } ~LinkedList()27 ~LinkedList() {} insert(LinkedList<T> & node)28 void insert(LinkedList<T>& node) { 29 assert(node.empty()); 30 node.next_ = this->next_; 31 node.next_->prev_ = &node; 32 this->next_ = &node; 33 node.prev_ = this; 34 } remove()35 void remove() { 36 this->next_->prev_ = this->prev_; 37 this->prev_->next_ = this->next_; 38 this->next_ = this; 39 this->prev_ = this; 40 } data()41 T data() { return data_; } empty()42 bool empty() { return next_ == this && prev_ == this; } next()43 LinkedList<T>* next() { return next_; } 44 45 private: 46 LinkedList<T>* next_; 47 LinkedList<T>* prev_; 48 T data_; 49 }; 50 51 template <class T> 52 class LinkedListHead { 53 public: LinkedListHead()54 LinkedListHead() : node_() {} ~LinkedListHead()55 ~LinkedListHead() {} 56 57 private: 58 LinkedList<T> node_; 59 }; 60 61 } // namespace android 62 63 #endif 64