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std::thread::swap

线程：：交换

void swap( thread& other ​(since C++11)

交换两个线程对象的底层句柄。

参数

other-the thread to swap with

返回值

%280%29

例外

noexcept规格：

noexcept

例

二次

#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(
}

二次

可能的产出：

二次

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

二次

另见

std::swap(std::thread) (C++11)specializes the std::swap algorithm (function template)

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