QThread的currentThreadId()和currentThreadId一样吗--加括号与不加括号的区别

        首先，介绍下QThread的currentThreadId()方法：

Qt::HANDLE QThread::currentThreadId () [static]

Returns the thread handle of the currently executing thread.

Warning: The handle returned by this function is used for internal purposes and should not be used in any application code.

Warning: On Windows, the returned value is a pseudo-handle for the current thread. It can't be used for numerical comparison. i.e., this function returns the DWORD (Windows-Thread ID) returned by the Win32 function getCurrentThreadId(), not the HANDLE (Windows-Thread HANDLE) returned by the Win32 function getCurrentThread().

他是QThread类的一个静态方法，返回值是当前thread的HANDLE。

但是，我最近在用他来测试的 时候，发现currentThreadId()和currentThreadId的结果是不一样的，刚开始是忘记加括号，感觉结果不对，最后，找出原因，结果就正确了。

下面是我的代码:

//test.h文件

#include <QtGui/QMainWindow>

#include <QThread>

 

calss Test : public QWidget

{

        Q_OBJECT

public:

         test();

         ~test();

};

class MyThread : public QThread

{

     public:

            MyThread();

           ~MyThread();

     protected:

           void  run();

};

//test.cpp

#include <test.h>

Test::test() : QWidget

{

      MyThread  *mThread = new MyThread();

      mThread->start();

      qDebug()<<"[run中带() = ]"<<QThread::currentThreadId();

     qDebug()<<"[run中不带() = ]"<<QThread::currentThreadId;

}

MyThread::mythread()

{

}

void MyThread::run()

{

 

      qDebug()<<"[run中带() = ]"<<currentThreadId();

     qDebug()<<"[run中不带() = ]"<<currentThreadId;

}

//main.cpp

#include <test.h>

int main(int argc, char *argv[])
{
 QApplication a(argc, argv);
 sbpNatureTest w;
 w.show();

  qDebug()<<"{main中带() = }"<<(int)QThread::currentThreadId();

 qDebug()<<"{main中不带() = }"<<(int)QThread::currentThreadId;

 return a.exec();
}

上述结果中，除了run()中为次线程，其他地方都为主线程，即，main中和test() 中结果是一致的，  run()中和他们不同。

但是，带()和不带()的结果不同。