在基于回调的模块边界,经常出现需要延迟释放一个对象以便回调者进行一定的操作的情况.如果用定时器又比较麻烦.用内存池也不是很方便.
下面给出一种最简洁的解决方法 :
template<typename T,int BufferSize=10>class DelayCleaner
...{
public: DelayCleaner(void)
...{ _index=0; memset(_bufferArray,0,sizeof(T*)*BufferSize);
} virtual ~DelayCleaner(void) ...{ for(int i=0;i<BufferSize;i++) ...{ delete _bufferArray[_index]; _bufferArray[_index]=NULL; _index++; _index%=BufferSize; } } void AddObjToBuffer(T* obj) ...{ if(_bufferArray[_index]!=NULL) ...{ delete _bufferArray[_index]; } _bufferArray[_index]=obj; _index++; _index%=BufferSize; } void DelayDelete(T* obj) ...{ AddObjToBuffer(obj); }private: unsigned int _index; T* _bufferArray[BufferSize];
};// 需要延迟删除的对象class Target...{public: Target() ...{ } ~Target() ...{ }};// 测试代码: DelayCleaner< Target,5 > targetBuffer; for(int i=0;i<8;i++) targetBuffer.DelayDelete(new Target());