C + + Smart Pointer detailed
First, Introduction
Because the C + + language does not have an automatic memory recovery mechanism, the programmer will manually delete each new memory. The programmer forgets to delete, the process is too complex, resulting in no delete, and the exception causes the program to quit prematurely, and it is not uncommon to not execute the delete.
Using smart pointers can effecti
Why does a smart pointer still need release? Isn't it necessary to manage the reference count? Why?ProgramMember to release?
The reason is that the smart pointer object releases the interface pointed to when the object is destroyed, but if you destroy the com library before the function exits, you need to release it in advance.
For example:
: Coinitialize (null); // If Initialization is performed here
PS students know that there is such a thing, called smart object.
What exactly does it have in the egg?
A, smart object differs from a normal layer, which retains the source content of the image and all its original attributes.
In other words, no matter how you scale the selection of smart objects, it will not lose the original information.
Second
First, the concept of smart pointersThe smart pointer is a class, not a pointer , and the smart pointer automatically frees the system resources that are used by the contained pointer when it is no longer in use, rather than manually releasing it.Principle: The smart pointer encapsulates the AddRef () function and the
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The em
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............
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