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std::jthread:: get_id

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std::jthread
std :: jthread :: id get_id ( ) const noexcept ;
(C++20 이후)

std::jthread::id 값(이는 std::thread::id 의 타입 별칭임)을 반환하며, 이는 * this 와 연결된 스레드를 식별합니다.

목차

매개변수

(없음)

반환값

std::jthread::id 타입의 값으로, * this 와 연관된 스레드를 식별합니다. 연관된 스레드가 없는 경우, 기본 생성된 std::jthread::id 가 반환됩니다.

예제

이 코드 실행 
#include <chrono>
#include <iostream>
#include <thread>
void foo()
{
    std::this_thread::sleep_for(std::chrono::seconds(1));
}
int main()
{
    std::jthread t1(foo);
    std::jthread::id t1_id = t1.get_id();
    std::jthread t2(foo);
    std::jthread::id t2_id = t2.get_id();
    std::cout << "t1's id: " << t1_id << '\n';
    std::cout << "t2's id: " << t2_id << '\n';
    t1.join();
    t2.join();
    std::cout << "t1's id after join: " << t1.get_id() << '\n';
    std::cout << "t2's id after join: " << t2.get_id() << '\n';
}

가능한 출력: 

t1's id: 140146221688576
t2's id: 140146213295872
t1's id after join: thread::id of a non-executing thread
t2's id after join: thread::id of a non-executing thread

참고 항목

스레드의 id 를 나타냄
( std::thread 의 public member class)
스레드가 조인 가능한지 확인함, 즉 병렬 컨텍스트에서 실행 중일 수 있는지 여부
(public member function)