Circular References and Shared Pointers
When working with std::shared_ptr
, you might encounter an issue known as a circular reference. A circular reference occurs when two objects hold shared_ptr
references to each other. Since shared_ptr
uses reference counting, the count never reaches zero, causing a memory leak.
main.cpp
1234567891011121314151617181920212223242526#include <iostream> #include <memory> class B; // Forward declaration class A { public: std::shared_ptr<B> p_b; ~A() { std::cout << "A destroyed\n"; } }; class B { public: ~B() { std::cout << "B destroyed\n"; } std::shared_ptr<A> p_a; }; int main() { std::shared_ptr<A> a = std::make_shared<A>(); std::shared_ptr<B> b = std::make_shared<B>(); a->p_b = b; b->p_a = a; }
There is a way to fix this issue you need to use a different type of smart pointer.
Grazie per i tuoi commenti!
Chieda ad AI
Chieda ad AI
Chieda pure quello che desidera o provi una delle domande suggerite per iniziare la nostra conversazione
Awesome!
Completion rate improved to 5.56
Circular References and Shared Pointers
Scorri per mostrare il menu
When working with std::shared_ptr
, you might encounter an issue known as a circular reference. A circular reference occurs when two objects hold shared_ptr
references to each other. Since shared_ptr
uses reference counting, the count never reaches zero, causing a memory leak.
main.cpp
1234567891011121314151617181920212223242526#include <iostream> #include <memory> class B; // Forward declaration class A { public: std::shared_ptr<B> p_b; ~A() { std::cout << "A destroyed\n"; } }; class B { public: ~B() { std::cout << "B destroyed\n"; } std::shared_ptr<A> p_a; }; int main() { std::shared_ptr<A> a = std::make_shared<A>(); std::shared_ptr<B> b = std::make_shared<B>(); a->p_b = b; b->p_a = a; }
There is a way to fix this issue you need to use a different type of smart pointer.
Grazie per i tuoi commenti!