/*

 * Copyright (C) 2010 Apple Inc. All rights reserved.

 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)

 *

 * 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "WorkQueue.h"

#include <QLocalSocket>

#include <QObject>

#include <QThread>

#include <wtf/Threading.h>

class WorkQueue::WorkItemQt : public QObject {

    Q_OBJECT

public:

    WorkItemQt(WorkQueue* workQueue, WorkItem* workItem)

        : m_queue(workQueue)

        , m_source(0)

        , m_signal(0)

        , m_workItem(workItem)

    {

    }

    WorkItemQt(WorkQueue* workQueue, QObject* source, const char* signal, WorkItem* workItem)

        : m_queue(workQueue)

        , m_source(source)

        , m_signal(signal)

        , m_workItem(workItem)

    {

        connect(m_source, m_signal, SLOT(execute()), Qt::QueuedConnection);

    }

    ~WorkItemQt()

    {

        delete m_workItem;

    }

    Q_SLOT void execute() 

    { 

        if (m_queue->m_isValid)

            m_workItem->execute();

    }

    virtual void timerEvent(QTimerEvent*)

    {

        execute(); 

        delete this;

    }

    WorkQueue* m_queue;

    QObject* m_source;

    const char* m_signal;

    WorkItem* m_workItem;

};

void WorkQueue::connectSignal(QObject* o, const char* signal, PassOwnPtr<WorkItem> workItem)

{

    WorkQueue::WorkItemQt* itemQt = new WorkQueue::WorkItemQt(this, o, signal, workItem.leakPtr());

    itemQt->moveToThread(m_workThread);

    m_signalListeners.add(o, itemQt);

}

void WorkQueue::disconnectSignal(QObject* o, const char* name)

{

    HashMap<QObject*, WorkItemQt*>::iterator it = m_signalListeners.find(o);

    for (; it != m_signalListeners.end(); ++it) {

        if (strcmp(it->second->m_signal, name))

            continue;

        delete it->second;

        m_signalListeners.remove(it);

        return;

    }

}

void WorkQueue::moveSocketToWorkThread(QLocalSocket* socket)

{

    ASSERT(m_workThread);

    ASSERT(socket);

    socket->setParent(0);

    socket->moveToThread(m_workThread);

}

void WorkQueue::platformInitialize(const char*)

{

    m_workThread = new QThread();

    m_workThread->start();

}

void WorkQueue::platformInvalidate()

{

    m_workThread->exit();

    m_workThread->wait();

    delete m_workThread;

    deleteAllValues(m_signalListeners);

}

void WorkQueue::scheduleWork(PassOwnPtr<WorkItem> item)

{

    WorkQueue::WorkItemQt* itemQt = new WorkQueue::WorkItemQt(this, item.leakPtr());

    itemQt->startTimer(0);

    itemQt->moveToThread(m_workThread);

}

#include "WorkQueueQt.moc"