forked from mirror/libcxx
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35 lines
1.0 KiB
C++
35 lines
1.0 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// UNSUPPORTED: libcpp-has-no-threads
|
|
// FLAKY_TEST.
|
|
|
|
// <thread>
|
|
|
|
// template <class Clock, class Duration>
|
|
// void sleep_until(const chrono::time_point<Clock, Duration>& abs_time);
|
|
|
|
#include <thread>
|
|
#include <cstdlib>
|
|
#include <cassert>
|
|
|
|
int main()
|
|
{
|
|
typedef std::chrono::system_clock Clock;
|
|
typedef Clock::time_point time_point;
|
|
std::chrono::milliseconds ms(500);
|
|
time_point t0 = Clock::now();
|
|
std::this_thread::sleep_until(t0 + ms);
|
|
time_point t1 = Clock::now();
|
|
std::chrono::nanoseconds ns = (t1 - t0) - ms;
|
|
std::chrono::nanoseconds err = 5 * ms / 100;
|
|
// The time slept is within 5% of 500ms
|
|
assert(std::abs(ns.count()) < err.count());
|
|
}
|