shared_ptr::use_count
Compte le nombres de propriétaires de ressource.
long use_count() const;
Notes
The member function returns the number of shared_ptr objects that own the resource that is owned by *this.
Exemple
// std_tr1__memory__shared_ptr_use_count.cpp
// compile with: /EHsc
#include <memory>
#include <iostream>
int main()
{
std::shared_ptr<int> sp1(new int(5));
std::cout << "sp1.use_count() == "
<< sp1.use_count() << std::endl;
std::shared_ptr<int> sp2(sp1);
std::cout << "sp1.use_count() == "
<< sp1.use_count() << std::endl;
return (0);
}
Configuration requise
En-tête: <mémoire>
Espace de noms : std