15a83710eSEric Fiselier //===----------------------------------------------------------------------===// 25a83710eSEric Fiselier // 357b08b09SChandler Carruth // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 457b08b09SChandler Carruth // See https://llvm.org/LICENSE.txt for license information. 557b08b09SChandler Carruth // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 65a83710eSEric Fiselier // 75a83710eSEric Fiselier //===----------------------------------------------------------------------===// 85a83710eSEric Fiselier // 9*a7f9895cSLouis Dionne // UNSUPPORTED: no-threads 105a83710eSEric Fiselier 115a83710eSEric Fiselier // <thread> 125a83710eSEric Fiselier 135a83710eSEric Fiselier // template <class Clock, class Duration> 145a83710eSEric Fiselier // void sleep_until(const chrono::time_point<Clock, Duration>& abs_time); 155a83710eSEric Fiselier 165a83710eSEric Fiselier #include <thread> 175a83710eSEric Fiselier #include <cstdlib> 185a83710eSEric Fiselier #include <cassert> 195a83710eSEric Fiselier 207fc6a556SMarshall Clow #include "test_macros.h" 217fc6a556SMarshall Clow main(int,char **)222df59c50SJF Bastienint main(int, char**) 235a83710eSEric Fiselier { 245a83710eSEric Fiselier typedef std::chrono::system_clock Clock; 255a83710eSEric Fiselier typedef Clock::time_point time_point; 265a83710eSEric Fiselier std::chrono::milliseconds ms(500); 275a83710eSEric Fiselier time_point t0 = Clock::now(); 285a83710eSEric Fiselier std::this_thread::sleep_until(t0 + ms); 295a83710eSEric Fiselier time_point t1 = Clock::now(); 304f4d6c81SDavid Zarzycki // NOTE: Operating systems are (by default) best effort and therefore we may 314f4d6c81SDavid Zarzycki // have slept longer, perhaps much longer than we requested. 324f4d6c81SDavid Zarzycki assert(t1 - t0 >= ms); 332df59c50SJF Bastien 342df59c50SJF Bastien return 0; 355a83710eSEric Fiselier } 36