What is the role of a weak reference counter in memory management?

The weak reference count is used in memory management systems with reference counting (for example, in ARC in iOS) to prevent cyclic dependencies.

Main idea:

• Strong references increase the ownership count of an object, preventing it from being deleted.
• Weak references do not increase the ownership count, so they do not prevent the object from being deleted.

Role of the weak reference count:

• Allows tracking how many weak references point to an object.
• When the object is deleted (the strong reference count reaches zero), weak references are automatically nulled to avoid dangling pointers.

Example: if two objects reference each other with strong references, they will never be deleted. Using weak references breaks the cycle, allowing the system to correctly free memory.