Using QThread : QThread « Qt « C++

1. C++
2. Qt
3. QThread

Using QThread

  
/****************************************************************************
**
** 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 documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** 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
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#include <QThread>


class MyThread : public QThread
{
    Q_OBJECT

protected:
    void run();
};





#include <QCache>
#include <QMutex>
#include <QThreadStorage>

#include "threads.h"


void MyThread::run()
 
{
 
}


#define Counter ReentrantCounter


class Counter
 
{
public:
    Counter() { n = 0; }

    void increment() { ++n; }
    void decrement() { --n; }
    int value() const { return n; }

private:
    int n;
};


#undef Counter
#define Counter ThreadSafeCounter


class Counter
 
{
public:
    Counter() { n = 0; }

    void increment() { QMutexLocker locker(&mutex); ++n; }
    void decrement() { QMutexLocker locker(&mutex); --n; }
    int value() const { QMutexLocker locker(&mutex); return n; }

private:
    mutable QMutex mutex;
    int n;
};


typedef int SomeClass;


QThreadStorage<QCache<QString, SomeClass> *> caches;

void cacheObject(const QString &key, SomeClass *object)
 
{
    if (!caches.hasLocalData())
        caches.setLocalData(new QCache<QString, SomeClass>);

    caches.localData()->insert(key, object);
}

void removeFromCache(const QString &key)
 
{
    if (!caches.hasLocalData())
        return;

    caches.localData()->remove(key);
}


int main()
{
    return 0;
}

   
    
  

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