harbour-books/app/src/BooksTask.cpp

/*
 * Copyright (C) 2015-2018 Jolla Ltd.
 * Copyright (C) 2015-2018 Slava Monich <slava.monich@jolla.com>
 *
 * You may use this file under the terms of the BSD license as follows:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * 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.
 *   * Neither the name of Jolla Ltd nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER OR 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.
 */

#include "BooksTask.h"
#include "BooksTaskQueue.h"

#include "HarbourDebug.h"

#include <QCoreApplication>

BooksTask::BooksTask(QThread* aThread) :
    iAboutToQuit(false),
    iSubmitted(false),
    iStarted(false),
    iReleased(false),
    iDone(false)
{
    setAutoDelete(false);
    if (aThread) moveToThread(aThread);
    connect(qApp, SIGNAL(aboutToQuit()), SLOT(onAboutToQuit()));
    connect(this, SIGNAL(runFinished()), SLOT(onRunFinished()),
        Qt::QueuedConnection);
}

BooksTask::~BooksTask()
{
    HASSERT(iReleased);
    if (iSubmitted) wait();
}

void BooksTask::release(QObject* aHandler)
{
    disconnect(aHandler);
    iReleased = true;
    if (!iSubmitted || iDone) {
        delete this;
    }
}

void BooksTask::run()
{
    HASSERT(!iStarted);
    iStarted = true;
    performTask();
    Q_EMIT runFinished();
}

void BooksTask::onRunFinished()
{
    HASSERT(!iDone);
    if (!iReleased) {
        Q_EMIT done();
    }
    iDone = true;
    if (iReleased) {
        delete this;
    }
}

void BooksTask::onAboutToQuit()
{
    HDEBUG("OK");
    iAboutToQuit = true;
}