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std::jthread:: swap

From cppreference.net

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std::jthread
void swap ( std:: jthread & other ) noexcept ;
(C++20 이후)

두 jthread 객체의 기본 핸들을 교환합니다.

목차

매개변수

other - 교환할 jthread

반환값

(없음)

예제

이 코드 실행 
#include <chrono>
#include <iostream>
#include <thread>
void foo()
{
    std::this_thread::sleep_for(std::chrono::seconds(1));
}
void bar()
{
    std::this_thread::sleep_for(std::chrono::seconds(1));
}
int main()
{
    std::jthread t1(foo);
    std::jthread t2(bar);
    std::cout << "thread 1 id: " << t1.get_id() << '\n'
              << "thread 2 id: " << t2.get_id() << '\n';
    std::swap(t1, t2);
    std::cout << "after std::swap(t1, t2):" << '\n'
              << "thread 1 id: " << t1.get_id() << '\n'
              << "thread 2 id: " << t2.get_id() << '\n';
    t1.swap(t2);
    std::cout << "after t1.swap(t2):" << '\n'
              << "thread 1 id: " << t1.get_id() << '\n'
              << "thread 2 id: " << t2.get_id() << '\n';
}

가능한 출력: 

thread 1 id: 140185268262656
thread 2 id: 140185259869952
after std::swap(t1, t2):
thread 1 id: 140185259869952
thread 2 id: 140185268262656
after t1.swap(t2):
thread 1 id: 140185268262656
thread 2 id: 140185259869952

참고 항목

(C++20)
std::swap 알고리즘을 특수화함
(함수)