shared_ptr::use_count
리소스 소유자의 수를 계산합니다.
long use_count() const;
설명
The member function returns the number of shared_ptr objects that own the resource that is owned by *this.
예제
// 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);
}
요구 사항
헤더 <memory>
네임스페이스: std