QT单例模式的宏实现

将http://www.cnblogs.com/codingmylife/archive/2010/07/14/1777409.html中的单例模式，用宏的方式重写

#define Declare_Singlon(className)\
    public:\
    static className &getInstance(void){\
        className::instance.testAndSetOrdered(0,0);\
        if (instance.testAndSetOrdered(0, 0)){\
            QMutexLocker locker(&mutex);\
            instance.testAndSetOrdered(0, new className);\
        }\
        return  *instance;\
    }\
    private:\
    QReadWriteLock internalMutex;\
    className();\
    className(const className &);\
    className & operator =(const className &);\
    static  QMutex mutex;\
    static  QAtomicPointer<className> instance;

#define Implement_Singlon(className)\
    QMutex className::mutex;\
    QAtomicPointer<className> className::instance = 0;

注：由于宏中不支持#ifndef，将其移除，

使用方法：

class xmlAppsetting
{
    Declare_Singlon(xmlAppsetting)
private:
    FyXMLOpe xmlOpe;
    QString strFileName;
    // DeviceInfo
    QString strTpsList;
    QString strTPSName;
    QString strPortList;
    QString strPort;
    QString strGJYList;
    QString strGJYName;
public:
    void InitFromXML();
    void SaveToXML();
};

在CPP文件中加入

Implement_Singlon(xmlAppsetting)