/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of jom.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/

#ifndef IOCOMPLETIONPORT_H
#define IOCOMPLETIONPORT_H

#include <qset.h>
#include <qmutex.h>
#include <qthread.h>
#include <qt_windows.h>

namespace NMakeFile {

class IoCompletionPortObserver
{
public:
    virtual void completionPortNotified(DWORD numberOfBytes, DWORD errorCode) = 0;
};

class IoCompletionPort : protected QThread
{
public:
    static IoCompletionPort *instance();
    static void destroyInstance();

    void registerObserver(IoCompletionPortObserver *notifier, HANDLE hFile);
    void unregisterObserver(IoCompletionPortObserver *notifier);

protected:
    void run();

private:
    IoCompletionPort();
    ~IoCompletionPort();

    static IoCompletionPort *m_instance;
    HANDLE hPort;
    QSet<IoCompletionPortObserver *> observers;
    QMutex mutex;
};

} // namespace NMakeFile

#endif // IOCOMPLETIONPORT_H