#include <chrono> #include <iostream> #include <thread> // 建议其他线程运行一小段时间的“忙睡眠” void little_sleep(std::chrono::microseconds us) { auto start = std::chrono::high_resolution_clock::now(); auto end = start + us; do { std::this_thread::yield(); } while (std::chr...
\n" << std::flush; const auto start{now()}; std::this_thread::sleep_until(awake_time()); std::chrono::duration<double, std::milli> elapsed{now() - start}; std::cout << "已等待 " << elapsed.count() << " ms\n"; } 可能的输出: 你好,等待者... 已等待 2000.17 ms...
cout << "协程开始,线程 ID:" << std::this_thread::get_id() << '\n'; co_await switch_to_new_thread(out); // 等待器在此销毁 std::cout << "协程恢复,线程 ID:" << std::this_thread::get_id() << '\n'; } int main() { std::jthread out; resuming_on_new_thread(out); ...
#include <chrono> #include <iostream> #include <thread> 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::basic_string::resize_and_overwrite (P1072R10) Rvalue reference overload of std::basic_string::substr for efficient slicing (P2438R2) Formatting ranges, tuples, escaped presentation of characters and strings, std::thread::id, and stacktraces. (P2286R8) (P2585R1) (P2693R1) I...
thread−jthread(C++20) atomic−atomic_flag atomic_ref(C++20)−memory_order Mutual exclusion−Condition variables Futures−Semaphores(C++20) latch(C++20)−barrier(C++20) Safe Reclamation(C++26) Execution support library(C++26) Feature test macros(C++20) ...
Coroutine started on thread: "<< std::this_thread::get_id() <<'\n'; co_await switch_to_new_thread(*out);// awaiter destroyed herestd::cout <<"Coroutine resumed on thread: "<< std::this_thread::get_id() <<'\n'; }intmain() { std::jthread out; resuming_on_new_thread(&...
()std::future<int>f2=std::async(std::launch::async,[](){return8;});// future from a promisestd::promise<int>p;std::future<int>f3=p.get_future();std::thread([](std::promise<int>&p){p.set_value(9);},std::ref(p)).detach();std::cout<<"Waiting...";f1.wait();f2....
#include <iostream>#include <chrono>#include <thread>#include <mutex>#include #include <string>std::map<std::string,std::string>g_pages;std::mutexg_pages_mutex;voidsave_page(conststd::string&url){// simulate a long page fetchstd::this_thread::sleep_for(std::chrono::seconds(2));std...
std::this_thread::sleep_for(std::chrono::seconds(1)); // 获取异步调用的结果 int sum = result.get(); std::cout << "Sum: " << sum << std::endl; return 0; } 在这个示例中,std::async 异步地调用了 add 函数,并立即返回了一个 std::future 对象。主线程在等...