queue_simple.c

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/****************************************************************************
 *
 *  Copyright (c) 2017, Michael Becker (michael.f.becker@gmail.com)
 *
 *  This file is part of the FreeRTOS Add-ons project.
 *
 *  Source Code:
 *  https://github.com/michaelbecker/freertos-addons
 *
 *  Project Page:
 *  http://michaelbecker.github.io/freertos-addons/
 *
 *  On-line Documentation:
 *  http://michaelbecker.github.io/freertos-addons/docs/html/index.html
 *
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 *  copy of this software and associated documentation files
 *  (the "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so,subject to the
 *  following conditions:
 *
 *  + The above copyright notice and this permission notice shall be included
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#include <stdlib.h>
#include "queue_simple.h"


void InitQueue(Queue_t *Queue)
{
    if (Queue == NULL)
        return;

    Queue->Count = 0;
    DlInitHead(&Queue->Head);
}


void Enqueue(Queue_t *Queue, DlNode_t *Node)
{
    if (Queue == NULL)
        return;

    if (Node == NULL)
        return;

    Queue->Count++;
    DlAddNodeToHead(&Queue->Head, Node);
}


DlNode_t *Dequeue(Queue_t *Queue)
{
    DlNode_t *Node;

    if (Queue == NULL)
        return NULL;

    if (Queue->Count <= 0)
        return NULL;

    Queue->Count--;
    Node = DlRemoveNodeFromTail(&Queue->Head);

    return Node;
}