std::thread::swap

1	`void` `swap(` `thread& other );`

(since C++11)

Exchanges the underlying handles of two thread objects.

Parameters

other

the thread to swap with

Return value

(none).

Exceptions

noexcept specification:

noexcept

Example

#include <iostream>
#include <thread>
#include <chrono>
  
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::thread t1(foo);
    std::thread t2(bar);
  
    std::cout << "thread 1 id: " << t1.get_id() << std::endl;
    std::cout << "thread 2 id: " << t2.get_id() << std::endl;
  
    std::swap(t1, t2);
  
    std::cout << "after std::swap(t1, t2):" << std::endl;
    std::cout << "thread 1 id: " << t1.get_id() << std::endl;
    std::cout << "thread 2 id: " << t2.get_id() << std::endl;
  
    t1.swap(t2);
  
    std::cout << "after t1.swap(t2):" << std::endl;
    std::cout << "thread 1 id: " << t1.get_id() << std::endl;
    std::cout << "thread 2 id: " << t2.get_id() << std::endl;
  
    t1.join();
    t2.join();
}

Possible output:

thread 1 id: 1892
thread 2 id: 2584
after std::swap(t1, t2):
thread 1 id: 2584
thread 2 id: 1892
after t1.swap(t2):
thread 1 id: 1892
thread 2 id: 2584

std::thread::swap

Parameters

Return value

Exceptions

Example

See also