std::shared_ptr::use_count
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| long use_count() const; |
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Returns the number of different shared_ptr instances (this included) managing the current object. If there is no managed object, 0 is returned.
Sommaire |
[modifier] Paramètres
(Aucun)
Original:
(none)
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[modifier] Retourne la valeur
the number of shared_ptr instances managing the current object or 0 if there is no managed object.
[modifier] Exemple
#include <memory> #include <iostream> void fun(std::shared_ptr<int> sp) { std::cout << "fun: sp.use_count() == " << sp.use_count() << std::endl; } int main() { std::shared_ptr<int> sp1 {std::make_shared<int>(5)}; std::cout << "sp1.use_count() == " << sp1.use_count() << std::endl; fun(sp1); }
Résultat :
sp1.use_count() == 1 fun: sp.use_count() == 2
[modifier] Voir aussi
| vérifie si l'objet géré est géré uniquement par l'instance actuelle shared_ptr Original: checks whether the managed object is managed only by the current shared_ptr instance The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
