File content as of revision 29:b6af04b77a56:

/**
 * ACKme WiConnect Host Library is licensed under the BSD licence: 
 * 
 * Copyright (c)2014 ACKme Networks.
 * 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. 
 * 3. The name of the author may not be used to endorse or promote products 
 * derived from this software without specific prior written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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


#include "api/WiconnectTypes.h"


namespace wiconnect
{

/**
 * Class for hold queued commands
 *
 * @note Internal use only
 */
class CommandQueue
{
public:
    /*************************************************************************************************/
    CommandQueue()
    {
        head = tail = queue;
        count = 0;
    }

    /*************************************************************************************************/
    bool isFull()
    {
        return count == WICONNECT_MAX_QUEUED_COMMANDS;
    }

    /*************************************************************************************************/
    bool isEmpty()
    {
        return count == 0;
    }

    /*************************************************************************************************/
    bool push(QueuedCommand *cmd)
    {
        if(isFull())
        {
            return false;
        }
        ++count;
        *tail = cmd;
        if(++tail >= queue + WICONNECT_MAX_QUEUED_COMMANDS)
        {
            tail = queue;
        }

        return true;
    }

    /*************************************************************************************************/
    QueuedCommand* pop()
    {
        if(isEmpty())
            return NULL;

        QueuedCommand* cmd = *head;
        --count;
        if(++head >= queue + WICONNECT_MAX_QUEUED_COMMANDS)
        {
            head = queue;
        }
        return cmd;
    }

protected:
    QueuedCommand* queue[WICONNECT_MAX_QUEUED_COMMANDS];
    QueuedCommand** head;
    QueuedCommand** tail;
    int count;
};




}