Why can't you have resource handles on the stack without

Question

C / C++

Thomas

Why can't you have resource handles on the stack without

RAII?

0

03.01.2024

13 ответов

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Thomas Автор вопроса

Kenshin Himura
Cause that will mean manual disposal of the resour...

Manual is fine by me

0

4 месяца назад

Kenshin Himura

Thomas
Manual is fine by me

By you. Not for the greater number of C++ developers, and not for the multitude of most developers in other programming languages, seeing that few of the major programming languages permit manual resource disposal.

0

4 месяца назад

Sebastian Dicke

Kenshin Himura
By you. Not for the greater number of C++ develope...

In Java, Perl, PHP and Python you have to close file handles manually if you do not want to run out of them. May other languages have automatism for that.

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4 месяца назад

Kenshin Himura

Sebastian Dicke
In Java, Perl, PHP and Python you have to close fi...

And I maintain that none can match RAII cause, as I explained above, RAII does not force you to think about resource disposal routines at the call site, ensuring cleaner code.

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4 месяца назад

Thomas Автор вопроса

Kenshin Himura
And I maintain that none can match RAII cause, as ...

I don't it's cleaner when I can't see what's happening, in most cases I want to know everything about all the code

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4 месяца назад

harꭑony5 (⊙ ◡ ⦿︎) ↺

Sebastian Dicke
In Java, Perl, PHP and Python you have to close fi...

Python has context managers that do that for you when the handle goes out of scope

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4 месяца назад

Kenshin Himura

Thomas
I don't it's cleaner when I can't see what's happe...

Clean code should have a separation between the logic of the function and resource management. Why should a function to process account balances also have memory management code? Why should code to calculate coordinates also have socket management code? https://www.fluentcpp.com/2016/12/15/respect-levels-of-abstraction/

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4 месяца назад

Thomas Автор вопроса

Kenshin Himura
Clean code should have a separation between the lo...

I thoroughly disagree with this, if logic should be separated from resource management, it should be actually separated, not just hidden, but mixed

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4 месяца назад

Kenshin Himura

harꭑony5 (⊙ ◡ ⦿︎) ↺
Python has context managers that do that for you w...

Yes, and it operates similar to RAII in C++; resource acquisition at beginning of context, then cleanup at end of context (scope). However, with Python, in order for you or users of your own classes to take advantage of this, you must implement the context management protocol. With C++, you just need a constructor, destructor, and any interface you or your users will need to access the internal resource. There is no protocol that you have to adhere to.

0

4 месяца назад

Thomas Автор вопроса

Kenshin Himura
Cause that will mean manual disposal of the resour...

https://youtu.be/LKKmPAQFNgE

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4 месяца назад

BSP

Thomas
https://youtu.be/LKKmPAQFNgE

I wonder what happens if you do stuff with the orphaned vector. Probably UAF eventually.

0

4 месяца назад