#include <iostream> #include <thread> #include <mutex> #include <list> #include <future> using namespace std; int myThread(int num) { cout << "myThread() start thread id =" << this_thread::get_id() << endl; cout << "num is " << num << endl; std::chrono::microseconds s(5000); std::this_thread::sleep_for(s); cout << "myThread() end thread id =" << this_thread::get_id() << endl; return 5; } int main() { cout << "main run thread id =" << std::this_thread::get_id() << endl; /* packaged_task 包装函数,执行线程,可以拿到线程的返回值,不知道工作中应用场景在哪,但是学都学了,得记下来 */ // 创建一个打包任务,把任务包装起来 std::packaged_task<int(int)> mypt(myThread); std::thread t(std::ref(mypt), 121212); t.join(); std::future<int> res = mypt.get_future(); cout << res.get() << endl; cout << "main end" << endl; return 0; }
- packaged_task packaged 任务 thread taskpackaged_task packaged任务thread packaged_task std packaged_task packaged promise 线程packaged_task packaged task packaged_task packaged标准task package_task packages_task task package_task get_future package package_task package lambda future extensions threading system tasks