| 1 | //===----------------------------------------------------------------------===// |
|---|
| 2 | // |
|---|
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
|---|
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
|---|
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
|---|
| 6 | // |
|---|
| 7 | //===----------------------------------------------------------------------===// |
|---|
| 8 | // |
|---|
| 9 | // UNSUPPORTED: no-threads |
|---|
| 10 | |
|---|
| 11 | // <thread> |
|---|
| 12 | |
|---|
| 13 | // template <class Clock, class Duration> |
|---|
| 14 | // void sleep_until(const chrono::time_point<Clock, Duration>& abs_time); |
|---|
| 15 | |
|---|
| 16 | #include <cassert> |
|---|
| 17 | #include <chrono> |
|---|
| 18 | #include <cstdlib> |
|---|
| 19 | #include <thread> |
|---|
| 20 | |
|---|
| 21 | #include "test_macros.h" |
|---|
| 22 | |
|---|
| 23 | int main(int, char**) |
|---|
| 24 | { |
|---|
| 25 | typedef std::chrono::system_clock Clock; |
|---|
| 26 | typedef Clock::time_point time_point; |
|---|
| 27 | std::chrono::milliseconds ms(500); |
|---|
| 28 | time_point t0 = Clock::now(); |
|---|
| 29 | std::this_thread::sleep_until(t0 + ms); |
|---|
| 30 | time_point t1 = Clock::now(); |
|---|
| 31 | // NOTE: Operating systems are (by default) best effort and therefore we may |
|---|
| 32 | // have slept longer, perhaps much longer than we requested. |
|---|
| 33 | assert(t1 - t0 >= ms); |
|---|
| 34 | |
|---|
| 35 | return 0; |
|---|
| 36 | } |
|---|
| 37 | |
|---|
