std::jthread::get_id
来自 cppreference.com
std::jthread::id get_id() const noexcept; |
(自 C++20 起) | |
返回 std::jthread::id 的值(它是 std::thread::id 的类型别名),标识与 *this 关联的线程。
内容 |
[编辑] 参数
(无)
[编辑] 返回值
类型为 std::jthread::id 的值,标识与 *this 关联的线程。如果没有关联的线程,则返回默认构造的 std::jthread::id。
[编辑] 示例
运行此代码
#include <chrono> #include <iostream> #include <thread> void foo() { std::this_thread::sleep_for(std::chrono::seconds(1)); } int main() { std::jthread t1(foo); std::jthread::id t1_id = t1.get_id(); std::jthread t2(foo); std::jthread::id t2_id = t2.get_id(); std::cout << "t1's id: " << t1_id << '\n'; std::cout << "t2's id: " << t2_id << '\n'; t1.join(); t2.join(); std::cout << "t1's id after join: " << t1.get_id() << '\n'; std::cout << "t2's id after join: " << t2.get_id() << '\n'; }
可能的输出
t1's id: 140146221688576 t2's id: 140146213295872 t1's id after join: thread::id of a non-executing thread t2's id after join: thread::id of a non-executing thread
[编辑] 另请参阅
表示线程的 id ( std::thread 的公共成员类) | |
检查线程是否可连接,即是否可能在并行上下文中运行 (公共成员函数) |