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std::jthread:: swap

From cppreference.net

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

Échange les handles sous-jacents de deux objets jthread.

Table des matières

Paramètres

autre - le jthread avec lequel échanger

Valeur de retour

(aucun)

Exemple

Exécuter ce code 
#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';
}

Sortie possible : 

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

Voir aussi

(C++20)
spécialise l'algorithme std::swap
(fonction)