73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
#ifndef SINGLETONBASE_H
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#define SINGLETONBASE_H
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//做一个单例
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#include <QHash>
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#include <QList>
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//#include <iostream>
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template<typename KeyType,typename ValueType,typename ChildType>
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class SingletonBase
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{
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public:
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SingletonBase()
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{
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this->initInstance();
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}
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// ~SingletonBase();
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void add(const KeyType& key,const ValueType& val)
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{
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QHash<KeyType,ValueType> *t=SingletonBase<KeyType,ValueType,ChildType>::ht;
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(*t)[key]=val;
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}
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bool contains(const KeyType& key)
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{
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return SingletonBase<KeyType,ValueType,ChildType>::ht->contains(key);
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}
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ValueType& get(const KeyType& key)
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{
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QHash<KeyType,ValueType> *t=SingletonBase<KeyType,ValueType,ChildType>::ht;
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return (*t)[key];
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}
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QList<KeyType> keys()
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{
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return SingletonBase<KeyType,ValueType,ChildType>::ht->keys();
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}
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private:
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void initInstance()
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{
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// if(SingletonBase<KeyType,ValueType,ChildType>::ht)
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// {
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// delete SingletonBase<KeyType,ValueType,ChildType>::ht;
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// SingletonBase<KeyType,ValueType,ChildType>::ht==NULL;
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// }
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if(!SingletonBase<KeyType,ValueType,ChildType>::ht)
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{
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SingletonBase<KeyType,ValueType,ChildType>::ht=new QHash<KeyType,ValueType>;
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}
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}
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protected:
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class CG // 它的唯一工作就是在析构函数中删除CSingleton的实例
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{
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public:
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~CG()
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{
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if (SingletonBase::ht)
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delete SingletonBase::ht;
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}
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};
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static CG Garbo; // 定义一个静态成员，在程序结束时，系统会调用它的析构函数
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static QHash<KeyType,ValueType> *ht;
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};
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template<typename KT,typename VT,typename CT>
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QHash<KT,VT> *SingletonBase<KT,VT,CT>::ht=NULL;
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#endif // SINGLETONBASE_H
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