CODEWITHSUNDEEP
c++memory-leaks
May
May

Reputation: 121

how to fix c++ memory leaks?

I have code like this, when class A manages an object B and vector<shared_ptr<B>>, then I create a Afrom a static method, when I do this, I think if A::returnA() goes out of scope, then A::returnA() will be deleted, then B that's managed by A is deleted, then vector<shared_ptr<B>> is deleted.

However, when I run this code, the memory usage displayed in monitor is huge, and continue increasing, I don't know why this is leaking memory. 

#include <vector>
#include <memory>
#include <iostream>
using namespace std;

class A {
public:
    static A returnA(){
        return A();
    }
    class B {
    public:
        ~B() { cout << "~B" << endl; }
    };
    B b;
    vector<std::shared_ptr<B>> v;
    A(){
        std::unique_ptr<B> b2 = make_unique<B>();
        v.emplace_back(new B());
    };
    ~A() { cout << "~A" << endl; }
};

int main() {
    while(1){
        A::returnA();
    }
}

enter image description here

Upvotes: 0

Views: 298

Answers (1)

user1118321
user1118321

Reputation: 26395

Your screenshot does not show the memory of your app. It shows the memory of Xcode. It's Xcode that's taking up so much memory, possibly because it's keeping the log of cout so you can scroll through it.

Upvotes: 3

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