ToneBufferQueue.h

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/****
 * Sming Framework Project - Open Source framework for high efficiency native ESP8266 development.
 * Created 2015 by Skurydin Alexey
 * http://github.com/SmingHub/Sming
 * All files of the Sming Core are provided under the LGPL v3 license.
 *
 * ToneBufferQueue.h
 *
 * @author Sept 2019 mikee47 <mike@sillyhouse.net>
 *
 ****/

#pragma once

#include "ToneBuffer.h"
#include <esp_attr.h>

class ToneBufferQueue
{
public:
    ~ToneBufferQueue()
    {
        clear();
    }

    void insert(ToneBuffer* buf)
    {
        buf->next = head;
        head = buf;
    }

    void append(ToneBuffer* buf);

    void append(ToneBufferQueue& queue)
    {
        append(queue.head);
        queue.head = nullptr;
    }

    ToneBuffer* IRAM_ATTR dequeue();

    ToneBuffer* peek() const
    {
        return head;
    }

    bool empty() const
    {
        return head == nullptr;
    }

    void clear()
    {
        delete head;
        head = nullptr;
    }

private:
    ToneBuffer* head = nullptr;
};