即callee拿到raw pointer,它没有理由去删除这个对象,删除对象的责任,应该是caller。 记住贤者的话 重新引述一下Herb Sutter的话 Don’t pass a smart pointer as a function parameter unless you want to use or manipulate the smart pointer itself, such as to share or transfer ownership. Prefer passing ob...
smart pointer是用来“管理”资源的，或者说它对资源有“所有权”。如果根本不存在需要管理的资源，smart pointer就根本没有存在的意义，也根本不该使用
"shared_ptr"也是raw pointer的container。它通过维护它所包括pointer的reference-counted全部权而与其它全部shared_ptr的副本进行协作。仅仅有当全部shared_ptr的副本都被销毁时,被它所包括的raw pointer所指向的object才会被销毁。当想要将一个raw pointer赋给多个拥有者时,使用shared_ptr。 shared_ptr的大小是两个指针...
Weak pointer和shared pointer是有一些区别的。当reference count掉到0,Weak pointer是没有能力将对象留在内存的。 使用weak pointer相对于raw pointer的一个很大的优势就是当weak pointer包裹的object使用ConditionalBeginDestory()手动删除时,weak pointer自动变成NULL。这个功能能让你来检查pointer指向的资源是否还正常被...
为了解决这个问题,我们引入了Smart Pointer,用于管理Source对象的生命周期。我们并没有使用C++ 11,因为SRS需要支持在各种不同的环境编译。 相反,我们实现了一个简化版本的Smart Pointer,只支持了部分功能。 Design 在处理这个问题之前,我们需要改进 SRS 的 shared ptr,它用于 RTMP 共享消息、GB 会话以及未来的源对象。
Pass a raw pointer to anew-ed object in the smart pointer constructor. (Some utility functions or smart pointer constructors do this for you.) Use the overloaded->and*operators to access the object. Let the smart pointer delete the object. ...
{//implement serialization for auto_ptr<T>//note: this must be added to the boost namesapce in order to//be called by the libarytemplate<typenameArchive,typenameT>inlinevoidsave(Archive&ar,conststd::auto_ptr<T>&t,constunsignedintfile_version){//only the raw pointer has to be savedcont ...
If your object has a RAW pointer then you need to remember the rule of 3 (now the rule of 5 in C++11). Constructor Destructor Copy Constructor Assignment Operator Move Constructor (C++11) Move Assignment (C++11) 智能指针 Smart Memory Management ...
A unique_ptr is a container for a raw pointer, which the unique_ptr is said to own. A unique_ptrexplicitly prevents copying of its contained pointer (as would happen with normal assignment), but the std::move function can be used to transfer ownership of the contained pointer to another ...
Or I might have a raw pointer that owns a reference to its target that I’d like to attach without an additional reference being procured. This can also be useful for coalescing references in rare cases: XML void Attach(Interface * other) noexcept { InternalRelease(); m_ptr = other; }...