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      std::shared_ptr::use_count

      Da cppreference.com
      < cpp‎ | memory‎ | shared ptr

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      long use_count()const;

      Returns the number of different shared_ptr instances (this included) managing the current object. If there is no managed object, ​0​ is returned.

      Índice

      [editar]Parâmetros

      (Nenhum)
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      (none)
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      [editar]Valor de retorno

      the number of shared_ptr instances managing the current object or ​0​ if there is no managed object.

      [editar]Exemplo

      #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);}

      Saída: 

      sp1.use_count() == 1 fun: sp.use_count() == 2

      [editar]Veja também

      Verifica se o objeto gerenciado é gerido apenas pela instância shared_ptr atual
      Original:
      checks whether the managed object is managed only by the current shared_ptr instance
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      (função pública membro)[edit]
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