W3CHINA.ORG讨论区--Program with DOM in C/C++ Using Smart Pointer Class Wrappers

贴子主题： Program with DOM in C/C++ Using Smart Pointer Class Wrappers

本主题类别:

Smart Pointer
是内存智能指针

它的文档在MSDN中可以找到：

The template class describes an object that stores a pointer to an allocated object of type Type* that ensures that the object to which it points gets destroyed automatically when control leaves a block.

template <class Type>
class auto_ptr
Parameter
Type
The type of object for which storage is being allocated or deallocated.
Remarks
The template class describes an object that stores a pointer to an allocated object myptr of type Type *. The stored pointer must either be null or designate an object allocated by a new expression. An object constructed with a nonnull pointer owns the pointer. It transfers ownership if its stored value is assigned to another object. (It replaces the stored value after a transfer with a null pointer.) The destructor for auto_ptr<Type> deletes the allocated object if it owns it. Hence, an object of class auto_ptr<Type> ensures that an allocated object is automatically deleted when control leaves a block, even through a thrown exception. You should not construct two auto_ptr<Type> objects that own the same object.

You can pass an auto_ptr<Type> object by value as an argument to a function call. You can return such an object by value as well. Both operations depend on the implicit construction of intermediate objects of class auto_ptr<Type>::auto_ptr_ref<Other>, by various subtle conversion rules. You cannot, however, reliably manage a sequence of auto_ptr<Type> objects with a Standard Template Library container.

它是一个模板类允许C++实现象 C# Java那样的自动回收内存
当new一个内存并用auto_ptr关联后，内存的生存周期就由它管理
当auto_ptr析构的时候会释放内存

这样做的效率比 .Net JAVA2 的GC效率高明很多

一个内存的生存周期管理权是可以再分发的～～～
这个模板类是 stl里面的

唯一的不足是不能维护数组内存
如果你要的化可以自己写一个
很简单的

如果你还有什么疑问可以看我的一个封装了
真巧我没看过那篇E文不过我也这样做了

地址是这个, 你可以下下去看一下哦～～
http://bbs.xml.org.cn/viewfile.asp?ID=1633


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