/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtCore module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef QTHREAD_P_H

#define QTHREAD_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

//

#include "qplatformdefs.h"

#include "QtCore/qthread.h"

#include "QtCore/qmutex.h"

#include "QtCore/qstack.h"

#include "QtCore/qwaitcondition.h"

#include "QtCore/qmap.h"

#include "private/qobject_p.h"

#ifdef Q_OS_SYMBIAN

#include <e32base.h>

#endif

QT_BEGIN_NAMESPACE

class QAbstractEventDispatcher;

class QEventLoop;

class QPostEvent

{

public:

    QObject *receiver;

    QEvent *event;

    int priority;

    inline QPostEvent()

        : receiver(0), event(0), priority(0)

    { }

    inline QPostEvent(QObject *r, QEvent *e, int p)

        : receiver(r), event(e), priority(p)

    { }

};

inline bool operator<(int priority, const QPostEvent &pe)

{

    return pe.priority < priority;

}

inline bool operator<(const QPostEvent &pe, int priority)

{

    return priority < pe.priority;

}

class QPostEventList : public QList<QPostEvent>

{

public:

    // recursion == recursion count for sendPostedEvents()

    int recursion;

    // sendOffset == the current event to start sending

    int startOffset;

    // insertionOffset == set by sendPostedEvents to tell postEvent() where to start insertions

    int insertionOffset;

    QMutex mutex;

    inline QPostEventList()

        : QList<QPostEvent>(), recursion(0), startOffset(0), insertionOffset(0)

    { }

};

#ifndef QT_NO_THREAD

class QThreadPrivate : public QObjectPrivate

{

    Q_DECLARE_PUBLIC(QThread)

public:

    QThreadPrivate(QThreadData *d = 0);

    ~QThreadPrivate();

    mutable QMutex mutex;

    bool running;

    bool finished;

    bool terminated;

    uint stackSize;

    QThread::Priority priority;

    static QThread *threadForId(int id);

#ifdef Q_OS_UNIX

    pthread_t thread_id;

    QWaitCondition thread_done;

    static void *start(void *arg);

#if defined(Q_OS_SYMBIAN)

    static void finish(void *arg, bool lockAnyway=true, bool closeNativeHandle=true);

#else

    static void finish(void *);

#endif

#endif // Q_OS_UNIX

#if defined(Q_OS_WIN32) || defined(Q_OS_WINCE)

    HANDLE handle;

    unsigned int id;

    int waiters;

    static unsigned int __stdcall start(void *);

    static void finish(void *, bool lockAnyway=true);

#endif // Q_OS_WIN32

#if defined(Q_OS_WIN32) || defined(Q_OS_WINCE) || defined (Q_OS_SYMBIAN)

    bool terminationEnabled, terminatePending;

# endif

    QThreadData *data;

    static void createEventDispatcher(QThreadData *data);

};

#else // QT_NO_THREAD

class QThreadPrivate : public QObjectPrivate

{

public:

    QThreadPrivate(QThreadData *d = 0) : data(d ? d : new QThreadData) {}

    ~QThreadPrivate() { delete data; }

    QThreadData *data;

    static void setCurrentThread(QThread*) {}

    static QThread *threadForId(int) { return QThread::currentThread(); }

    static void createEventDispatcher(QThreadData *data);

    Q_DECLARE_PUBLIC(QThread)

};

#endif // QT_NO_THREAD

class QThreadData

{

    QAtomicInt _ref;

public:

    QThreadData(int initialRefCount = 1);

    ~QThreadData();

    static QThreadData *current();

    static QThreadData *get2(QThread *thread)

    { Q_ASSERT_X(thread != 0, "QThread", "internal error"); return thread->d_func()->data; }

    void ref();

    void deref();

    QThread *thread;

    bool quitNow;

    int loopLevel;

    QAbstractEventDispatcher *eventDispatcher;

    QStack<QEventLoop *> eventLoops;

    QPostEventList postEventList;

    bool canWait;

    QMutex mutex;

# ifdef Q_OS_SYMBIAN

    RThread symbian_thread_handle;

# endif

};

// thread wrapper for the main() thread

class QAdoptedThread : public QThread

{

    Q_DECLARE_PRIVATE(QThread)

public:

    QAdoptedThread(QThreadData *data = 0);

    ~QAdoptedThread();

    void init();

    static QThread *createThreadForAdoption();

private:

    void run();

};

QT_END_NAMESPACE

#endif // QTHREAD_P_H