c++ - QThread::currentThread () 与 QObject::thread()

Question

除了第一个函数的常量性之外，如果这两个函数之间有任何区别，我正在寻找答案:

QThread * QObject::thread() const
QThread * QThread::currentThread()

Answer 1

它们完全不同。

QThread * QObject::thread() const 返回特定 QObject 所在的线程。

QThread * QThread::currentThread() 返回指向管理当前执行线程的 QThread 的指针。

class MyClass : public QObject
{

};

int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    MyClass * obj = new MyClass();
    QThread thread2;
    obj->moveToThread(&thread2);
    thread2.start();

    qDebug() << "The current thread is " << QThread::currentThread();
    qDebug() << "The thread2 address is " << &thread2;
    qDebug() << "The object is in thread " << obj->thread();

    return app.exec();
}

示例输出:

The current thread is QThread(0x1436b20)
The thread2 address is QThread(0x7fff29753a30)
The object is in thread QThread(0x7fff29753a30)