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libcxx initial import

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
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Howard Hinnant
2010-05-11 19:42:16 +00:00
commit bc8d3f97eb
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32
test/thread/thread.threads/thread.thread.this/sleep_for.pass.cpp Normal file
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//===----------------------------------------------------------------------===//
//
// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <thread>
// template <class Rep, class Period>
// void sleep_for(const chrono::duration<Rep, Period>& rel_time);
#include <thread>
#include <cstdlib>
#include <cassert>
int main()
{
typedef std::chrono::system_clock Clock;
typedef Clock::time_point time_point;
typedef Clock::duration duration;
std::chrono::milliseconds ms(500);
time_point t0 = Clock::now();
std::this_thread::sleep_for(ms);
time_point t1 = Clock::now();
std::chrono::nanoseconds ns = (t1 - t0) - ms;
std::chrono::nanoseconds err = ms / 100;
// The time slept is within 1% of 500ms
assert(std::abs(ns.count()) < err.count());
}