Hi there Does deleting the 'instance' on line 24 result in

To answer your question; no Deleting instance results in output being deleted. int number is basically automatically deleted when the function returns, static int x is never deleted, and never created, there's just one x for the entire lifetime of the program

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11 месяцев назад

Sahand 🏔️ Автор вопроса

Thomas
L21 calls new L11 calls new (called by L22) So 2 c...

Yes, technically I need to delete 'output' if I want to deallocate it. But also I need it to return from my function.. actually I will be happy if it gets deleted by deleting the 'instance' variable, so the memory leaks will be avoided ....

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11 месяцев назад

Azadi

Why should deleting the object instance delete all data in func?

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11 месяцев назад

Thomas

Sahand 🏔️
Yes, technically I need to delete 'output' if I wa...

Are you on Linux? I think you should try ltrace

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11 месяцев назад

Sahand 🏔️ Автор вопроса

Azadi
Why should deleting the object instance delete all...

I thought deleting instance result in deleting on-heap-allocated data too .. that's my guess

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11 месяцев назад

Thomas

Sahand 🏔️
I thought deleting instance result in deleting on-...

It does, but variables in functions are not on-heap

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11 месяцев назад

Sahand 🏔️ Автор вопроса

Thomas
Are you on Linux? I think you should try ltrace

That's an online compiler

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11 месяцев назад

Sahand 🏔️ Автор вопроса

Thomas
It does, but variables in functions are not on-hea...

Yep

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11 месяцев назад

Sahand 🏔️ Автор вопроса

Thomas
output is the only thing you allocate, so it's the...

What do you mean by "when you reassign instance" ? Like what I did on line 22 here ? https://t.me/thedevs_c/246528

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11 месяцев назад

Azadi

Sahand 🏔️
I thought deleting instance result in deleting on-...

delete will free the memory allocated by new. So in this case yes. As for the static variable,it remains until your program terminates.

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11 месяцев назад

Thomas

Sahand 🏔️
What do you mean by "when you reassign instance" ?...

yes

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11 месяцев назад

Sahand 🏔️ Автор вопроса

Thomas
output is the only thing you allocate, so it's the...

Here you said "that is never deleted" but here https://t.me/thedevs_c/246534 you also said deleting instance results in deleting output... So .. ? I'm a bit confused 😬 Will output be deleted by deleting instance?

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11 месяцев назад

Thomas

// this is never deleted A *instance = new A; A *output = new A; instance = output; // output is deleted delete instance;

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11 месяцев назад

Thomas

Thomas
// this is never deleted A *instance = new A; A *...

instance = output; overwrites the original address of instance, and then the original can never be deleted, because you lost the address to it

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11 месяцев назад

Sahand 🏔️ Автор вопроса

Thomas
instance = output; overwrites the original address...

Oh now I understand A* instance = new A; A* ptr = instance; instance = instance->func(); /* some code */ // GC delete instance; instance = ptr; delete instance; This one also works right ?

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11 месяцев назад

Thomas

Sahand 🏔️
Oh now I understand A* instance = new A; A* ptr =...

yeah

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11 месяцев назад

Thomas · Accepted Answer

Thomas

output is the only thing you allocate, so it's the only thing you need to delete from inside func(). BUT this still leaks memory, because the original instance is overwritten when you reassign instance, so that is never deleted

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11 месяцев назад

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Hi there Does deleting the 'instance' on line 24 result in

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