wtf/SinglyLinkedList.h

   1 /*
   2  * Copyright (C) 2011 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef SinglyLinkedList_h
  27 #define SinglyLinkedList_h
  28
  29 namespace WTF {
  30
  31 template <typename Node> class SinglyLinkedList {
  32 public:
  33     SinglyLinkedList();
  34
  35     bool isEmpty();
  36
  37     void push(Node*);
  38     Node* pop();
  39
  40 private:
  41     Node* m_head;
  42 };
  43
  44 template <typename Node> inline SinglyLinkedList<Node>::SinglyLinkedList()
  45     : m_head(0)
  46 {
  47 }
  48
  49 template <typename Node> inline bool SinglyLinkedList<Node>::isEmpty()
  50 {
  51     return !m_head;
  52 }
  53
  54 template <typename Node> inline void SinglyLinkedList<Node>::push(Node* node)
  55 {
  56     ASSERT(node);
  57     node->setNext(m_head);
  58     m_head = node;
  59 }
  60
  61 template <typename Node> inline Node* SinglyLinkedList<Node>::pop()
  62 {
  63     Node* tmp = m_head;
  64     m_head = m_head->next();
  65     return tmp;
  66 }
  67
  68 }
  69
  70 using WTF::SinglyLinkedList;
  71
  72 #endif