Source/WTF/wtf/SinglyLinkedList.h

/*
 * Copyright (C) 2011 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

namespace WTF {

template <typename Node>
class SinglyLinkedList {
public:
    SinglyLinkedList();
    
    bool isEmpty();

    void push(Node*);
    Node* pop();

private:
    Node* m_head;
};

template <typename Node> inline SinglyLinkedList<Node>::SinglyLinkedList()
    : m_head(0)
{
}

template <typename Node> inline bool SinglyLinkedList<Node>::isEmpty()
{
    return !m_head;
}

template <typename Node> inline void SinglyLinkedList<Node>::push(Node* node)
{
    ASSERT(node);
    node->setNext(m_head);
    m_head = node;
}

template <typename Node> inline Node* SinglyLinkedList<Node>::pop()
{
    Node* tmp = m_head;
    m_head = m_head->next();
    return tmp;
}

}

using WTF::SinglyLinkedList;