119 lines
2.0 KiB
C++
119 lines
2.0 KiB
C++
//-----------------------------------------------------------------------------+
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// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
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// = FileName : TSafeHeapMem.h
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// = Version : ver2.0
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// = Author : xlc
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// = CreateDate : 2002-09-09
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// = Description: 类的声明 可以自由浅拷贝的堆内存资源
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// = Maintainers:
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//
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//-----------------------------------------------------------------------------+
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#ifndef _TSAFEHEAPMEM_H_
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#define _TSAFEHEAPMEM_H_
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#ifndef _TSAFERESOURCE_H_
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#include "TSafeResource.h"
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#endif
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template<class T> class TSafeHeapMem : public TSafeResource
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{
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public:
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//初次分配堆内存
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TSafeHeapMem(long size = 0);
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//放弃堆空间
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virtual ~TSafeHeapMem();
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//分配一个新资源并放弃原资源
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void Realloc(long size);
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T& operator*();
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T& operator[](long index);
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protected:
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//释放堆内存
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virtual void Release();
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//获取堆内存
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virtual void Apply(TSafeResource& source);
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protected:
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T* p;
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};
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template<class T>
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TSafeHeapMem<T>::TSafeHeapMem(long size)
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{
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//初次分配堆内存
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//如果要求的长度<=0,则分配一个空内存，
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if(size <= 0)
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{
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p = NULL;
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}
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else
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{
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p = new T[size];
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}
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}
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template<class T>
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void TSafeHeapMem<T>::Realloc(long size)
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{
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//分配一个新资源并放弃原资源
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Detach();
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if(size <= 0)
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{
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p = NULL;
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}
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else
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{
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p = new T[size];
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}
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}
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template<class T>
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TSafeHeapMem<T>::~TSafeHeapMem()
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{
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//放弃堆空间
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Detach();
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}
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template<class T>
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T& TSafeHeapMem<T>::operator*()
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{
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//p 不能为null
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return *p;
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}
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template<class T>
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T& TSafeHeapMem<T>::operator[](long index)
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{
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//index必须是有效的
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return p[index];
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}
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template<class T>
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void TSafeHeapMem<T>::Release()
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{
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//释放堆内存
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//如果内存为不存在，则不进行任何操作。
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if(p != NULL)
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{
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delete[] p;
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p = NULL;
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}
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}
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template<class T>
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void TSafeHeapMem<T>::Apply(TSafeResource&source)
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{
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//获取堆内存
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//得到它的地址，
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p = ((TSafeHeapMem<T>&)source).p;
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}
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#endif |