firemail

标题: QSocketNotifier: Socket notifiers cannot be enabled or disabled from another ... [打印本页]

---

作者: Qter    时间: 2018-3-11 22:40
标题: QSocketNotifier: Socket notifiers cannot be enabled or disabled from another ...
QSocketNotifier: Socket notifiers cannot be enabled or disabled from another thread


主线程中不能调用网络请求，把网络请求放线程中。

---

作者: Qter    时间: 2018-3-24 14:03
跟单例的实现方法也有关系，如下两个，上面会报这个错，下面正常

1.     static QSharedPointer<QControlSo>& instance()
   
2.     {
   
3. 
   
4.         if (m_pInstance.isNull())
   
5.         {
   
6.             QMutexLocker mutexLocker(&m_Mutex);
   
7.             if (m_pInstance.isNull())
   
8.                 m_pInstance = QSharedPointer<QControlSo>(new QControlSo());
   
9.         }
   
10.         return m_pInstance;
    
11.     }

复制代码

下面的正确

1. static QControlSo &instance(void)
   
2.         {
   
3.     #ifdef Q_ATOMIC_POINTER_TEST_AND_SET_IS_ALWAYS_NATIVE
   
4.             if(!QAtomicPointer<QControlSo>::isTestAndSetNative())//运行时进行检测
   
5.                 qDebug() << "Error: don's support TestAndSetNative!!!!!!";
   
6.     #endif
   
7.             //双重检测加锁
   
8.             if(m_pInstance.testAndSetOrdered(0,0)){
   
9.                 QMutexLocker locker(&m_Mutex);
   
10.                 m_pInstance.testAndSetOrdered(0, new QControlSo);
    
11.             }
    
12.             return * m_pInstance;
    
13.         }
    
14. 
    
15. private://下与上相同
    
16.     QControlSo();
    
17.     QControlSo(const QControlSo &);
    
18.     QControlSo & operator=(const QControlSo &);
    
19.     QReadWriteLock internalMutex;
    
20.     static QMutex m_Mutex;
    
21.     static QAtomicPointer<QControlSo> m_pInstance;
    
22. 
    
23. QMutex QControlSo::m_Mutex;
    
24. QAtomicPointer<QControlSo> QControlSo::m_pInstance;

复制代码

---

欢迎光临 firemail (http://firemail.wang:8088/)

Powered by Discuz! X3