remotedataqueue.cpp

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// Copyright (C) 2018 Edouard Griffiths, F4EXB.                                  //
//                                                                               //
// Remtoe sink channel (Rx) data blocks queue                                    //
//                                                                               //
// SDRangel can serve as a remote SDR front end that handles the interface       //
// with a physical device and sends or receives the I/Q samples stream via UDP   //
// to or from another SDRangel instance or any program implementing the same     //
// protocol. The remote SDRangel is controlled via its Web REST API.             //
//                                                                               //
// This program is free software; you can redistribute it and/or modify          //
// it under the terms of the GNU General Public License as published by          //
// the Free Software Foundation as version 3 of the License, or                  //
// (at your option) any later version.                                           //
//                                                                               //
// This program is distributed in the hope that it will be useful,               //
// but WITHOUT ANY WARRANTY; without even the implied warranty of                //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                  //
// GNU General Public License V3 for more details.                               //
//                                                                               //
// You should have received a copy of the GNU General Public License             //
// along with this program. If not, see <http://www.gnu.org/licenses/>.          //

#include <channel/remotedatablock.h>
#include <channel/remotedataqueue.h>
#include <QDebug>
#include <QMutexLocker>

RemoteDataQueue::RemoteDataQueue(QObject* parent) :
    QObject(parent),
    m_lock(QMutex::Recursive),
    m_queue()
{
}

RemoteDataQueue::~RemoteDataQueue()
{
    RemoteDataBlock* data;

    while ((data = pop()) != 0)
    {
        qDebug() << "RemoteDataQueue::~RemoteDataQueue: data block was still in queue";
        delete data;
    }
}

void RemoteDataQueue::push(RemoteDataBlock* data, bool emitSignal)
{
    if (data)
    {
        m_lock.lock();
        m_queue.append(data);
        m_lock.unlock();
    }

    if (emitSignal)
    {
        emit dataBlockEnqueued();
    }
}

RemoteDataBlock* RemoteDataQueue::pop()
{
    QMutexLocker locker(&m_lock);

    if (m_queue.isEmpty())
    {
        return 0;
    }
    else
    {
        return m_queue.takeFirst();
    }
}

int RemoteDataQueue::size()
{
    QMutexLocker locker(&m_lock);

    return m_queue.size();
}

void RemoteDataQueue::clear()
{
    QMutexLocker locker(&m_lock);
    m_queue.clear();
}