std::swap(std::thread)
来自cppreference.com
void swap( std::thread &lhs, std::thread &rhs ) noexcept; |
(C++11 起) | |
对 std::thread 重载 std::swap 算法。交换 lhs
与 rhs
的状态。等效地调用 lhs.swap(rhs) 。
参数
lhs, rhs | - | 要交换状态的 thread |
返回值
(无)
示例
运行此代码
#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() { using std::swap; std::thread t1(foo); std::thread t2(bar); std::cout << "thread 1 id: " << t1.get_id() << '\n' << "thread 2 id: " << t2.get_id() << '\n'; 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'; t1.join(); t2.join(); }
可能的输出:
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
参阅
交换二个 thread 对象 (公开成员函数) |