Singleton*Singleton::m_pInstance=NULL; 17 18 /** 19 * @fn creatInstance 20 * @brief Create a Singleton instance. 21 * @return A pointer to Singleton Instance, or NULL if failed. 22 * @author wei.chen (2010-7-19) 23 */ 24 Singleton*Singleton::creatInstance() 25 { 26 std::cout...
QMutex SingleTon::mutex; QAtomicPointer<SingleTon> SingleTon::instance = 0; 双重锁检测在C++中是安全的,另外提供了读写锁,在修改单例数据的函数中使用写锁(QWriteLocker locker(&internalMutex););在读取单例数据的函数中使用读锁(QReadLocker locker(&internalMutex);)。 之前没考虑到乱序执行问题,并且此前...
sealed class Singleton { private Singleton() { } public static readonly Singleton TheInstance = new Singleton(); } ASingleton classes are even easier in C# than they are in C++ because the .NET Framework has the notion of singletons built in. Here's the C# Singleton pa...
1//Header file Singleton.h2classSingleton {3public:4staticSingleton& Instance() {//Unique point of access5if(0==_instance)6_instance =newSingleton();7return*_instance;8}9voidDoSomething();10private:11Singleton();//Prevent clients from creating a new Singleton12~Singleton();//Prevent clients...
Thread 1 再次实例化instance 这个单态已经不在是单态 二,为了解决刚才的问题:单态模式2 public static synchronized Singleton getInstance() { if (instance == null) //1 instance = new Singleton(); //2 return instance; //3 } 采用同步来解决,这种方式解决了问题,但是仔细分析 ...
return *instance;} private:SingleTon();//禁⽌构造函数。SingleTon(const SingleTon &);//禁⽌拷贝构造函数。SingleTon & operator=(const SingleTon &);//禁⽌赋值拷贝函数。QReadWriteLock internalMutex;//函数使⽤的读写锁。static QMutex mutex;//实例互斥锁。static QAtomicPointer<SingleTon> ...
Cannot load an instance of the following .NET Framework object: assembly Microsoft.Office.Interop.Excel, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c. Cannot marshal 'parameter #2': There is no marshaling support for nested arrays. cannot open <servicename> service on comp...
map<string,void*>m_vSingleton;//store the instance of Singleton: (key,value) -- (name,pointer) vector<releaseFun>m_vSingletonReleaseFun;//store the destructor of singleton }; externAppInstance* GetAppInstance(); #endif 这样你就可以将Singleton存到AppInstance之中,在附件Singleton之中,你会发现...
问尝试使用Singleton访问变量时的NPEEN假如后端有一个系统访问方式是通过IP加端口的形式访问的，如：10.1...
// instance_ pointer must acquire visibility over the singleton data. subtle::AtomicWord value = subtle::Acquire_Load(&instance_); if(value != 0 && value !=internal::kBeingCreatedMarker) { returnreinterpret_cast<Type*>(value); }